r339089 - [NFC] Test automatic variable initialization
Author: jfb
Date: Mon Aug 6 20:12:52 2018
New Revision: 339089
URL: http://llvm.org/viewvc/llvm-project?rev=339089&view=rev
Log:
[NFC] Test automatic variable initialization
Summary:
r337887 started using memset for automatic variable initialization where
sensible. A follow-up discussion leads me to believe that we should better test
automatic variable initialization, and that there are probably follow-up
patches in clang and LLVM to improve codegen. It’ll be important to measure -O0
compile time, and figure out which transforms should be in the frontend versus
the backend.
This patch is just a test of the current behavior, no questions asked.
Follow-up patches will tune the code generation.
Subscribers: dexonsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D50361
Added:
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Added: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=339089&view=auto
==
--- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (added)
+++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Mon Aug 6 20:12:52 2018
@@ -0,0 +1,999 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fblocks
-ftrivial-auto-var-init=pattern %s -emit-llvm -o - | FileCheck %s
+
+template void used(T &) noexcept;
+
+#define TEST_UNINIT(NAME, TYPE) \
+ using type_##NAME = TYPE; \
+ void test_##NAME##_uninit() { \
+type_##NAME uninit; \
+used(uninit); \
+ }
+
+// Value initialization on scalars, aggregate initialization on aggregates.
+#define TEST_BRACES(NAME, TYPE) \
+ using type_##NAME = TYPE; \
+ void test_##NAME##_braces() { \
+type_##NAME braces = {};\
+used(braces); \
+ }
+
+#define TEST_CUSTOM(NAME, TYPE, ...)\
+ using type_##NAME = TYPE; \
+ void test_##NAME##_custom() { \
+type_##NAME custom __VA_ARGS__; \
+used(custom); \
+ }
+
+struct empty {};
+struct small { char c; };
+struct smallinit { char c = 42; };
+struct smallpartinit { char c = 42, d; };
+struct nullinit { char* null = nullptr; };
+struct padded { char c; int i; };
+struct paddednullinit { char c = 0; int i = 0; };
+struct bitfield { int i : 4; int j : 2; };
+struct bitfieldaligned { int i : 4; int : 0; int j : 2; };
+struct big { unsigned a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s,
t, u, v, w, x, y, z; };
+struct arraytail { int i; int arr[]; };
+struct tailpad { short s; char c; };
+struct notlockfree { long long a[4]; };
+struct semivolatile { int i; volatile int vi; };
+struct semivolatileinit { int i = 0x; volatile int vi = 0x; };
+struct base { virtual ~base(); };
+struct derived : public base {};
+struct virtualderived : public virtual base, public virtual derived {};
+union matching { int i; float f; };
+union matchingreverse { float f; int i; };
+union unmatched { char c; int i; };
+union unmatchedreverse { int i; char c; };
+union unmatchedfp { float f; double d; };
+enum emptyenum {};
+enum smallenum { VALUE };
+
+extern "C" {
+
+TEST_UNINIT(char, char);
+// CHECK-LABEL: @test_char_uninit()
+// CHECK: %uninit = alloca i8, align 1
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
+
+TEST_BRACES(char, char);
+// CHECK-LABEL: @test_char_braces()
+// CHECK: %braces = alloca i8, align 1
+// CHECK-NEXT: store i8 0, i8* %braces, align 1
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
+
+TEST_UNINIT(uchar, unsigned char);
+// CHECK-LABEL: @test_uchar_uninit()
+// CHECK: %uninit = alloca i8, align 1
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
+
+TEST_BRACES(uchar, unsigned char);
+// CHECK-LABEL: @test_uchar_braces()
+// CHECK: %braces = alloca i8, align 1
+// CHECK-NEXT: store i8 0, i8* %braces, align 1
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
+
+TEST_UNINIT(schar, signed char);
+// CHECK-LABEL: @test_schar_uninit()
+// CHECK: %uninit = alloca i8, align 1
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
+
+TEST_BRACES(schar, signed char);
+// CHECK-LABEL: @test_schar_braces()
+// CHECK: %braces = alloca i8, align 1
+// CHECK-NEXT: store i8 0, i8* %braces, align 1
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
+
+TEST_UNINIT(wchar_t, wchar_t);
+// CHECK-LABEL: @test_wchar_t_uninit()
+// CHECK: %uninit = alloca i32, align 4
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
+
+TEST_BRACES(wchar_t, wchar_t);
+// CHECK-LABEL: @test_wchar_t_braces()
+// CHECK: %braces = alloca i32, align 4
+// CHECK-NEXT: store i32 0, i32* %braces, align 4
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
+
+TEST_UNINIT(short, sho
r339090 - Remove broken command flag
Author: jfb Date: Mon Aug 6 21:03:03 2018 New Revision: 339090 URL: http://llvm.org/viewvc/llvm-project?rev=339090&view=rev Log: Remove broken command flag I was using it for testing, r339089 shouldn't have contained it. Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=339090&r1=339089&r2=339090&view=diff == --- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (original) +++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Mon Aug 6 21:03:03 2018 @@ -1,4 +1,4 @@ -// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fblocks -ftrivial-auto-var-init=pattern %s -emit-llvm -o - | FileCheck %s +// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fblocks %s -emit-llvm -o - | FileCheck %s template void used(T &) noexcept; ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r339093 - Auto var init test fix #2
Author: jfb
Date: Mon Aug 6 21:44:13 2018
New Revision: 339093
URL: http://llvm.org/viewvc/llvm-project?rev=339093&view=rev
Log:
Auto var init test fix #2
It turns out that the AVX bots have different alignment for their vectors, and
my test mistakenly assumed a particular vector alignent on the stack. Instead,
capture the alignment and test for it in subsequent operations.
Modified:
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=339093&r1=339092&r2=339093&view=diff
==
--- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Mon Aug 6 21:44:13 2018
@@ -946,53 +946,53 @@ TEST_BRACES(intvec16, int __attribute__
TEST_UNINIT(longlongvec32, long long __attribute__((vector_size(32;
// CHECK-LABEL: @test_longlongvec32_uninit()
-// CHECK: %uninit = alloca <4 x i64>, align 16
+// CHECK: %uninit = alloca <4 x i64>, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(longlongvec32, long long __attribute__((vector_size(32;
// CHECK-LABEL: @test_longlongvec32_braces()
-// CHECK: %braces = alloca <4 x i64>, align 16
-// CHECK-NEXT: store <4 x i64> zeroinitializer, <4 x i64>* %braces, align 16
+// CHECK: %braces = alloca <4 x i64>, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store <4 x i64> zeroinitializer, <4 x i64>* %braces, align
[[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_CUSTOM(longlongvec32, long long __attribute__((vector_size(32))), {
0x, 0x, 0x, 0x
});
// CHECK-LABEL: @test_longlongvec32_custom()
-// CHECK: %custom = alloca <4 x i64>, align 16
-// CHECK-NEXT: store <4 x i64> , <4 x
i64>* %custom, align 16
+// CHECK: %custom = alloca <4 x i64>, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store <4 x i64> , <4 x
i64>* %custom, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%custom)
TEST_UNINIT(floatvec16, float __attribute__((vector_size(16;
// CHECK-LABEL: @test_floatvec16_uninit()
-// CHECK: %uninit = alloca <4 x float>, align 16
+// CHECK: %uninit = alloca <4 x float>, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(floatvec16, float __attribute__((vector_size(16;
// CHECK-LABEL: @test_floatvec16_braces()
-// CHECK: %braces = alloca <4 x float>, align 16
-// CHECK-NEXT: store <4 x float> zeroinitializer, <4 x float>* %braces, align
16
+// CHECK: %braces = alloca <4 x float>, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store <4 x float> zeroinitializer, <4 x float>* %braces, align
[[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_CUSTOM(floatvec16, float __attribute__((vector_size(16))), {
3.1415926535897932384626433, 3.1415926535897932384626433,
3.1415926535897932384626433, 3.1415926535897932384626433 });
// CHECK-LABEL: @test_floatvec16_custom()
-// CHECK: %custom = alloca <4 x float>, align 16
-// CHECK-NEXT: store <4 x float> , <4 x
float>* %custom, align 16
+// CHECK: %custom = alloca <4 x float>, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store <4 x float> , <4 x
float>* %custom, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%custom)
TEST_UNINIT(doublevec32, double __attribute__((vector_size(32;
// CHECK-LABEL: @test_doublevec32_uninit()
-// CHECK: %uninit = alloca <4 x double>, align 16
+// CHECK: %uninit = alloca <4 x double>, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(doublevec32, double __attribute__((vector_size(32;
// CHECK-LABEL: @test_doublevec32_braces()
-// CHECK: %braces = alloca <4 x double>, align 16
-// CHECK-NEXT: store <4 x double> zeroinitializer, <4 x double>* %braces,
align 16
+// CHECK: %braces = alloca <4 x double>, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store <4 x double> zeroinitializer, <4 x double>* %braces,
align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_CUSTOM(doublevec32, double __attribute__((vector_size(32))), {
3.1415926535897932384626433, 3.1415926535897932384626433,
3.1415926535897932384626433, 3.1415926535897932384626433 });
// CHECK-LABEL: @test_doublevec32_custom()
-// CHECK: %custom = alloca <4 x double>, align 16
-// CHECK-NEXT: store <4 x double> , <4 x
double>* %custom, align 16
+// CHECK: %custom = alloca <4 x double>, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store <4 x double> , <4 x
double>* %custom, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%custom)
___
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r339191 - [NFC] CGDecl factor out constant emission
Author: jfb
Date: Tue Aug 7 14:55:13 2018
New Revision: 339191
URL: http://llvm.org/viewvc/llvm-project?rev=339191&view=rev
Log:
[NFC] CGDecl factor out constant emission
The code is cleaner this way, and with some changes I'm playing with it makes
sense to split it out so we can reuse it.
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=339191&r1=339190&r2=339191&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Tue Aug 7 14:55:13 2018
@@ -1055,6 +1055,61 @@ static BytePattern shouldUseMemSetToInit
return constantIsRepeatedBytePattern(Init);
}
+static void emitStoresForConstant(CodeGenModule &CGM, const VarDecl &D,
+ Address Loc, bool isVolatile,
+ CGBuilderTy &Builder,
+ llvm::Constant *constant) {
+ auto *Int8Ty = llvm::IntegerType::getInt8Ty(CGM.getLLVMContext());
+ auto *IntPtrTy = CGM.getDataLayout().getIntPtrType(CGM.getLLVMContext());
+
+ // If the initializer is all or mostly the same, codegen with bzero / memset
+ // then do a few stores afterward.
+ uint64_t ConstantSize =
+ CGM.getDataLayout().getTypeAllocSize(constant->getType());
+ auto *SizeVal = llvm::ConstantInt::get(IntPtrTy, ConstantSize);
+ if (shouldUseBZeroPlusStoresToInitialize(constant, ConstantSize)) {
+Builder.CreateMemSet(Loc, llvm::ConstantInt::get(Int8Ty, 0), SizeVal,
+ isVolatile);
+
+bool valueAlreadyCorrect =
+constant->isNullValue() || isa(constant);
+if (!valueAlreadyCorrect) {
+ Loc = Builder.CreateBitCast(
+ Loc, constant->getType()->getPointerTo(Loc.getAddressSpace()));
+ emitStoresForInitAfterBZero(CGM, constant, Loc, isVolatile, Builder);
+}
+return;
+ }
+
+ BytePattern Pattern = shouldUseMemSetToInitialize(constant, ConstantSize);
+ if (!Pattern.isNone()) {
+uint8_t Value = Pattern.isAny() ? 0x00 : Pattern.getValue();
+Builder.CreateMemSet(Loc, llvm::ConstantInt::get(Int8Ty, Value), SizeVal,
+ isVolatile);
+return;
+ }
+
+ // Otherwise, create a temporary global with the initializer then memcpy from
+ // the global to the alloca.
+ std::string Name = getStaticDeclName(CGM, D);
+ unsigned AS = CGM.getContext().getTargetAddressSpace(
+ CGM.getStringLiteralAddressSpace());
+ llvm::Type *BP = llvm::PointerType::getInt8PtrTy(CGM.getLLVMContext(), AS);
+
+ llvm::GlobalVariable *GV = new llvm::GlobalVariable(
+ CGM.getModule(), constant->getType(), true,
+ llvm::GlobalValue::PrivateLinkage, constant, Name, nullptr,
+ llvm::GlobalValue::NotThreadLocal, AS);
+ GV->setAlignment(Loc.getAlignment().getQuantity());
+ GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
+
+ Address SrcPtr = Address(GV, Loc.getAlignment());
+ if (SrcPtr.getType() != BP)
+SrcPtr = Builder.CreateBitCast(SrcPtr, BP);
+
+ Builder.CreateMemCpy(Loc, SrcPtr, SizeVal, isVolatile);
+}
+
/// EmitAutoVarDecl - Emit code and set up an entry in LocalDeclMap for a
/// variable declaration with auto, register, or no storage class specifier.
/// These turn into simple stack objects, or GlobalValues depending on target.
@@ -1500,57 +1555,11 @@ void CodeGenFunction::EmitAutoVarInit(co
// in various ways.
bool isVolatile = type.isVolatileQualified();
- llvm::Value *SizeVal =
-llvm::ConstantInt::get(IntPtrTy,
-
getContext().getTypeSizeInChars(type).getQuantity());
-
llvm::Type *BP = CGM.Int8Ty->getPointerTo(Loc.getAddressSpace());
if (Loc.getType() != BP)
Loc = Builder.CreateBitCast(Loc, BP);
- // If the initializer is all or mostly the same, codegen with bzero / memset
- // then do a few stores afterward.
- uint64_t ConstantSize =
- CGM.getDataLayout().getTypeAllocSize(constant->getType());
- if (shouldUseBZeroPlusStoresToInitialize(constant, ConstantSize)) {
-Builder.CreateMemSet(Loc, llvm::ConstantInt::get(Int8Ty, 0), SizeVal,
- isVolatile);
-// Zero and undef don't require a stores.
-if (!constant->isNullValue() && !isa(constant)) {
- Loc = Builder.CreateBitCast(Loc,
-constant->getType()->getPointerTo(Loc.getAddressSpace()));
- emitStoresForInitAfterBZero(CGM, constant, Loc, isVolatile, Builder);
-}
-return;
- }
-
- BytePattern Pattern = shouldUseMemSetToInitialize(constant, ConstantSize);
- if (!Pattern.isNone()) {
-uint8_t Value = Pattern.isAny() ? 0x00 : Pattern.getValue();
-Builder.CreateMemSet(Loc, llvm::ConstantInt::get(Int8Ty, Value), SizeVal,
- isVolatile);
-return;
- }
-
- // Otherwise, create a temporary global with the initializer then
- // memcpy from the global to the alloca
r339196 - [NFC] Improve auto-var-init alignment check
Author: jfb
Date: Tue Aug 7 15:43:44 2018
New Revision: 339196
URL: http://llvm.org/viewvc/llvm-project?rev=339196&view=rev
Log:
[NFC] Improve auto-var-init alignment check
We're not actually testing for alignment, we just want to know that whatever
incoming alignment got propagated. Do that by capturing the alignment and
checking that it's actually what's passed later, instead of hard-coding an
alignment value.
Modified:
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=339196&r1=339195&r2=339196&view=diff
==
--- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Tue Aug 7 15:43:44 2018
@@ -54,459 +54,459 @@ extern "C" {
TEST_UNINIT(char, char);
// CHECK-LABEL: @test_char_uninit()
-// CHECK: %uninit = alloca i8, align 1
+// CHECK: %uninit = alloca i8, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(char, char);
// CHECK-LABEL: @test_char_braces()
-// CHECK: %braces = alloca i8, align 1
-// CHECK-NEXT: store i8 0, i8* %braces, align 1
+// CHECK: %braces = alloca i8, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i8 0, i8* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(uchar, unsigned char);
// CHECK-LABEL: @test_uchar_uninit()
-// CHECK: %uninit = alloca i8, align 1
+// CHECK: %uninit = alloca i8, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(uchar, unsigned char);
// CHECK-LABEL: @test_uchar_braces()
-// CHECK: %braces = alloca i8, align 1
-// CHECK-NEXT: store i8 0, i8* %braces, align 1
+// CHECK: %braces = alloca i8, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i8 0, i8* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(schar, signed char);
// CHECK-LABEL: @test_schar_uninit()
-// CHECK: %uninit = alloca i8, align 1
+// CHECK: %uninit = alloca i8, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(schar, signed char);
// CHECK-LABEL: @test_schar_braces()
-// CHECK: %braces = alloca i8, align 1
-// CHECK-NEXT: store i8 0, i8* %braces, align 1
+// CHECK: %braces = alloca i8, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i8 0, i8* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(wchar_t, wchar_t);
// CHECK-LABEL: @test_wchar_t_uninit()
-// CHECK: %uninit = alloca i32, align 4
+// CHECK: %uninit = alloca i32, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(wchar_t, wchar_t);
// CHECK-LABEL: @test_wchar_t_braces()
-// CHECK: %braces = alloca i32, align 4
-// CHECK-NEXT: store i32 0, i32* %braces, align 4
+// CHECK: %braces = alloca i32, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i32 0, i32* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(short, short);
// CHECK-LABEL: @test_short_uninit()
-// CHECK: %uninit = alloca i16, align 2
+// CHECK: %uninit = alloca i16, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(short, short);
// CHECK-LABEL: @test_short_braces()
-// CHECK: %braces = alloca i16, align 2
-// CHECK-NEXT: store i16 0, i16* %braces, align 2
+// CHECK: %braces = alloca i16, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i16 0, i16* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(ushort, unsigned short);
// CHECK-LABEL: @test_ushort_uninit()
-// CHECK: %uninit = alloca i16, align 2
+// CHECK: %uninit = alloca i16, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(ushort, unsigned short);
// CHECK-LABEL: @test_ushort_braces()
-// CHECK: %braces = alloca i16, align 2
-// CHECK-NEXT: store i16 0, i16* %braces, align 2
+// CHECK: %braces = alloca i16, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i16 0, i16* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(int, int);
// CHECK-LABEL: @test_int_uninit()
-// CHECK: %uninit = alloca i32, align 4
+// CHECK: %uninit = alloca i32, align
// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
TEST_BRACES(int, int);
// CHECK-LABEL: @test_int_braces()
-// CHECK: %braces = alloca i32, align 4
-// CHECK-NEXT: store i32 0, i32* %braces, align 4
+// CHECK: %braces = alloca i32, align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: store i32 0, i32* %braces, align [[ALIGN]]
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
TEST_UNINIT(unsigned, unsigned);
// CHECK-LABEL: @test_unsigned_uninit()
-// CHECK: %uninit = alloca i32, align 4
+// CHECK: %uninit = alloca i32, align
// CHECK-NEXT:
r339273 - CDDecl More automatic variable tail padding test
Author: jfb
Date: Wed Aug 8 10:05:17 2018
New Revision: 339273
URL: http://llvm.org/viewvc/llvm-project?rev=339273&view=rev
Log:
CDDecl More automatic variable tail padding test
Test tail padded automatic variable at different width, because they encounter
different codegen.
Modified:
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=339273&r1=339272&r2=339273&view=diff
==
--- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Wed Aug 8 10:05:17 2018
@@ -612,13 +612,32 @@ TEST_BRACES(tailpad4, tailpad[4]);
// CHECK-NEXT: call void @llvm.memset{{.*}}(i8* align [[ALIGN]] %{{.*}}, i8
0, i64 16, i1 false)
// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
-TEST_CUSTOM(tailpad4, tailpad[4], { {17, 1}, {17, 1}, {17, 1}, {17, 1} });
+TEST_CUSTOM(tailpad4, tailpad[4], { {257, 1}, {257, 1}, {257, 1}, {257, 1} });
// CHECK-LABEL: @test_tailpad4_custom()
// CHECK: %custom = alloca [4 x %struct.tailpad], align
// CHECK-NEXT: bitcast
// CHECK-NEXT: call void @llvm.memcpy
// CHECK-NEXT: call void @{{.*}}used{{.*}}%custom)
+TEST_UNINIT(tailpad9, tailpad[9]);
+// CHECK-LABEL: @test_tailpad9_uninit()
+// CHECK: %uninit = alloca [9 x %struct.tailpad], align
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
+
+TEST_BRACES(tailpad9, tailpad[9]);
+// CHECK-LABEL: @test_tailpad9_braces()
+// CHECK: %braces = alloca [9 x %struct.tailpad], align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: bitcast
+// CHECK-NEXT: call void @llvm.memset{{.*}}(i8* align [[ALIGN]] %{{.*}}, i8
0, i64 36, i1 false)
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
+
+TEST_CUSTOM(tailpad9, tailpad[9], { {257, 1}, {257, 1}, {257, 1}, {257, 1},
{257, 1}, {257, 1}, {257, 1}, {257, 1}, {257, 1} });
+// CHECK-LABEL: @test_tailpad9_custom()
+// CHECK: %custom = alloca [9 x %struct.tailpad], align [[ALIGN:[0-9]*]]
+// CHECK-NEXT: bitcast
+// CHECK-NEXT: call void @llvm.memset{{.*}}(i8* align [[ALIGN]] %{{.*}}, i8
1, i64 36, i1 false)
+// CHECK-NEXT: call void @{{.*}}used{{.*}}%custom)
+
TEST_UNINIT(atomicbool, _Atomic(bool));
// CHECK-LABEL: @test_atomicbool_uninit()
___
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r340510 - Improve incompatible triple error
Author: jfb Date: Wed Aug 22 20:55:24 2018 New Revision: 340510 URL: http://llvm.org/viewvc/llvm-project?rev=340510&view=rev Log: Improve incompatible triple error When complaining that the triple is incompatible with all targets, print out the triple not just a generic error about triples not matching. Modified: cfe/trunk/test/CodeGen/pr18235.c Modified: cfe/trunk/test/CodeGen/pr18235.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/pr18235.c?rev=340510&r1=340509&r2=340510&view=diff == --- cfe/trunk/test/CodeGen/pr18235.c (original) +++ cfe/trunk/test/CodeGen/pr18235.c Wed Aug 22 20:55:24 2018 @@ -1,3 +1,3 @@ // RUN: not %clang_cc1 -triple le32-unknown-nacl %s -S -o - 2>&1 | FileCheck %s -// CHECK: error: unable to create target: 'No available targets are compatible with this triple. +// CHECK: error: unable to create target: No available targets are compatible with triple "le32-unknown-nacl" ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r340511 - Missing quote in previous commit
Author: jfb Date: Wed Aug 22 21:09:49 2018 New Revision: 340511 URL: http://llvm.org/viewvc/llvm-project?rev=340511&view=rev Log: Missing quote in previous commit The test was failing because I missed a quote. Modified: cfe/trunk/test/CodeGen/pr18235.c Modified: cfe/trunk/test/CodeGen/pr18235.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/pr18235.c?rev=340511&r1=340510&r2=340511&view=diff == --- cfe/trunk/test/CodeGen/pr18235.c (original) +++ cfe/trunk/test/CodeGen/pr18235.c Wed Aug 22 21:09:49 2018 @@ -1,3 +1,3 @@ // RUN: not %clang_cc1 -triple le32-unknown-nacl %s -S -o - 2>&1 | FileCheck %s -// CHECK: error: unable to create target: No available targets are compatible with triple "le32-unknown-nacl" +// CHECK: error: unable to create target: 'No available targets are compatible with triple "le32-unknown-nacl"' ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r331845 - _Atomic of empty struct shouldn't assert
Author: jfb
Date: Tue May 8 20:51:12 2018
New Revision: 331845
URL: http://llvm.org/viewvc/llvm-project?rev=331845&view=rev
Log:
_Atomic of empty struct shouldn't assert
Summary:
An _Atomic of an empty struct is pretty silly. In general we just widen empty
structs to hold a byte's worth of storage, and we represent size and alignment
as 0 internally and let LLVM figure out what to do. For _Atomic it's a bit
different: the memory model mandates concrete effects occur when atomic
operations occur, so in most cases actual instructions need to get emitted. It's
really not worth trying to optimize empty struct atomics by figuring out e.g.
that a fence would do, even though sane compilers should do optimize atomics.
Further, wg21.link/p0528 will fix C++20 atomics with padding bits so that
cmpxchg on them works, which means that we'll likely need to do the zero-init
song and dance for empty atomic structs anyways (and I think we shouldn't
special-case this behavior to C++20 because prior standards are just broken).
This patch therefore makes a minor change to r176658 "Promote atomic type sizes
up to a power of two": if the width of the atomic's value type is 0, just use 1
byte for width and leave alignment as-is (since it should never be zero, and
over-aligned zero-width structs are weird but fine).
This fixes an assertion:
(NumBits >= MIN_INT_BITS && "bitwidth too small"), function get, file
../lib/IR/Type.cpp, line 241.
It seems like this has run into other assertions before (namely the unreachable
Kind check in ImpCastExprToType), but I haven't reproduced that issue with
tip-of-tree.
Reviewers: arphaman, rjmccall
Subscribers: aheejin, cfe-commits
Differential Revision: https://reviews.llvm.org/D46613
Modified:
cfe/trunk/lib/AST/ASTContext.cpp
cfe/trunk/test/CodeGen/c11atomics-ios.c
cfe/trunk/test/CodeGen/c11atomics.c
Modified: cfe/trunk/lib/AST/ASTContext.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ASTContext.cpp?rev=331845&r1=331844&r2=331845&view=diff
==
--- cfe/trunk/lib/AST/ASTContext.cpp (original)
+++ cfe/trunk/lib/AST/ASTContext.cpp Tue May 8 20:51:12 2018
@@ -1958,10 +1958,16 @@ TypeInfo ASTContext::getTypeInfoImpl(con
Width = Info.Width;
Align = Info.Align;
-// If the size of the type doesn't exceed the platform's max
-// atomic promotion width, make the size and alignment more
-// favorable to atomic operations:
-if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth()) {
+if (!Width) {
+ // An otherwise zero-sized type should still generate an
+ // atomic operation.
+ Width = Target->getCharWidth();
+ assert(Align);
+} else if (Width <= Target->getMaxAtomicPromoteWidth()) {
+ // If the size of the type doesn't exceed the platform's max
+ // atomic promotion width, make the size and alignment more
+ // favorable to atomic operations:
+
// Round the size up to a power of 2.
if (!llvm::isPowerOf2_64(Width))
Width = llvm::NextPowerOf2(Width);
Modified: cfe/trunk/test/CodeGen/c11atomics-ios.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/c11atomics-ios.c?rev=331845&r1=331844&r2=331845&view=diff
==
--- cfe/trunk/test/CodeGen/c11atomics-ios.c (original)
+++ cfe/trunk/test/CodeGen/c11atomics-ios.c Tue May 8 20:51:12 2018
@@ -319,3 +319,19 @@ _Bool test_promoted_cmpxchg(_Atomic(PS)
return __c11_atomic_compare_exchange_strong(addr, desired, *new, 5, 5);
}
+
+struct Empty {};
+
+struct Empty testEmptyStructLoad(_Atomic(struct Empty)* empty) {
+ // CHECK-LABEL: @testEmptyStructLoad(
+ // CHECK-NOT: @__atomic_load
+ // CHECK: load atomic i8, i8* %{{.*}} seq_cst, align 1
+ return *empty;
+}
+
+void testEmptyStructStore(_Atomic(struct Empty)* empty, struct Empty value) {
+ // CHECK-LABEL: @testEmptyStructStore(
+ // CHECK-NOT: @__atomic_store
+ // CHECK: store atomic i8 %{{.*}}, i8* %{{.*}} seq_cst, align 1
+ *empty = value;
+}
Modified: cfe/trunk/test/CodeGen/c11atomics.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/c11atomics.c?rev=331845&r1=331844&r2=331845&view=diff
==
--- cfe/trunk/test/CodeGen/c11atomics.c (original)
+++ cfe/trunk/test/CodeGen/c11atomics.c Tue May 8 20:51:12 2018
@@ -474,3 +474,17 @@ _Bool test_promoted_cmpxchg(_Atomic(PS)
// CHECK: ret i1 [[RES]]
return __c11_atomic_compare_exchange_strong(addr, desired, *new, 5, 5);
}
+
+struct Empty {};
+
+struct Empty test_empty_struct_load(_Atomic(struct Empty)* empty) {
+ // CHECK-LABEL: @test_empty_struct_load(
+ // CHECK: call arm_aapcscc zeroext i8 @__atomic_load_1(i8* %{{.*}}, i32 5)
+ return __c11_atomic_load(empty, 5);
+}
+
+void test_empty_struct_store(_Atomic(struct Empty)* empty, struct Empty value)
{
+
Re: [PATCH] D42933: [Sema] Avoid -Wformat warning for NSInteger/NSUInteger 'int' values with %zu/%zi long specifiers
> On May 9, 2018, at 1:25 PM, Shoaib Meenai via Phabricator > wrote: > > smeenai added a comment. > > Yeah, I think we all agree now that a portability warning isn't really > tractable. Note that even for the warnings that motivated this diff, they > should have only fired if `size_t` and NSInteger had separate types, so it > wasn't a portability warning in that sense to begin with (as in, it would > only warn if there was a mismatch for your current target, not if there was a > potential mismatch for any target). > > We still have two options: > > 1. Special-case NSInteger/NSUInteger on Apple platforms so that they can > always be printed using `%z` without any issues. > 2. Relax the format specifier warnings (either under a new warning option, > e.g. `-Wformat-relaxed`, or by relaxing `-Wformat` itself and adding > something like `-Wformat-pedantic`) so that you don't warn when the specifier > and the actual type have the same size and alignment, even when the actual > type is different (which would also cover the case in 1). > > I'm personally in favor of 2, and I can start a discussion on cfe-dev if you > think we should try to achieve a broader consensus. Whichever option we went > with, we would also have to ensure that the optimizer didn't do anything bad > (as @aaron.ballman pointed out), both now and in the future 2 sounds better overall. However I don’t like a relaxed flag because it’s weird when you have relaxed/normal/pedantic. How do they mix? What if I want format warnings, but not “portability” ones. I think we either want to move this to pedantic and (as you propose) only warm on -Wformat if size or alignment don’t match. We can also have a separate -Wformat-portability warning where we try (and fail) to be helpful. Please do start a thread on cfe-dev, much appreciated! > Repository: > rC Clang > > https://reviews.llvm.org/D42933 > > > ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r332801 - CodeGen: block capture shouldn't ICE
Author: jfb
Date: Fri May 18 21:21:26 2018
New Revision: 332801
URL: http://llvm.org/viewvc/llvm-project?rev=332801&view=rev
Log:
CodeGen: block capture shouldn't ICE
When a lambda capture captures a __block in the same statement, the compiler
asserts out because isCapturedBy assumes that an Expr can only be a BlockExpr,
StmtExpr, or if it's a Stmt then all the statement's children are expressions.
That's wrong, we need to visit all sub-statements even if they're not
expressions to see if they also capture.
Fix this issue by pulling out the isCapturedBy logic to use RecursiveASTVisitor.
Added:
cfe/trunk/test/CodeGenCXX/block-capture.cpp
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=332801&r1=332800&r2=332801&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Fri May 18 21:21:26 2018
@@ -1244,17 +1244,30 @@ CodeGenFunction::EmitAutoVarAlloca(const
return emission;
}
+static bool isCapturedBy(const VarDecl &, const Expr *);
+
+/// Determines whether the given __block variable is potentially
+/// captured by the given statement.
+static bool isCapturedBy(const VarDecl &Var, const Stmt *S) {
+ if (const Expr *E = dyn_cast(S))
+return isCapturedBy(Var, E);
+ for (const Stmt *SubStmt : S->children())
+if (isCapturedBy(Var, SubStmt))
+ return true;
+ return false;
+}
+
/// Determines whether the given __block variable is potentially
/// captured by the given expression.
-static bool isCapturedBy(const VarDecl &var, const Expr *e) {
+static bool isCapturedBy(const VarDecl &Var, const Expr *E) {
// Skip the most common kinds of expressions that make
// hierarchy-walking expensive.
- e = e->IgnoreParenCasts();
+ E = E->IgnoreParenCasts();
- if (const BlockExpr *be = dyn_cast(e)) {
-const BlockDecl *block = be->getBlockDecl();
-for (const auto &I : block->captures()) {
- if (I.getVariable() == &var)
+ if (const BlockExpr *BE = dyn_cast(E)) {
+const BlockDecl *Block = BE->getBlockDecl();
+for (const auto &I : Block->captures()) {
+ if (I.getVariable() == &Var)
return true;
}
@@ -1262,19 +1275,19 @@ static bool isCapturedBy(const VarDecl &
return false;
}
- if (const StmtExpr *SE = dyn_cast(e)) {
+ if (const StmtExpr *SE = dyn_cast(E)) {
const CompoundStmt *CS = SE->getSubStmt();
for (const auto *BI : CS->body())
- if (const auto *E = dyn_cast(BI)) {
-if (isCapturedBy(var, E))
-return true;
+ if (const auto *BIE = dyn_cast(BI)) {
+if (isCapturedBy(Var, BIE))
+ return true;
}
else if (const auto *DS = dyn_cast(BI)) {
// special case declarations
for (const auto *I : DS->decls()) {
if (const auto *VD = dyn_cast((I))) {
const Expr *Init = VD->getInit();
-if (Init && isCapturedBy(var, Init))
+if (Init && isCapturedBy(Var, Init))
return true;
}
}
@@ -1286,8 +1299,8 @@ static bool isCapturedBy(const VarDecl &
return false;
}
- for (const Stmt *SubStmt : e->children())
-if (isCapturedBy(var, cast(SubStmt)))
+ for (const Stmt *SubStmt : E->children())
+if (isCapturedBy(Var, SubStmt))
return true;
return false;
Added: cfe/trunk/test/CodeGenCXX/block-capture.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/block-capture.cpp?rev=332801&view=auto
==
--- cfe/trunk/test/CodeGenCXX/block-capture.cpp (added)
+++ cfe/trunk/test/CodeGenCXX/block-capture.cpp Fri May 18 21:21:26 2018
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -x c++ -std=c++11 -fblocks -emit-llvm %s -o - | FileCheck %s
+
+// CHECK: %struct.__block_byref_baz = type { i8*, %struct.__block_byref_baz*,
i32, i32, i32 }
+// CHECK: [[baz:%[0-9a-z_]*]] = alloca %struct.__block_byref_baz
+// CHECK: [[bazref:%[0-9a-z_\.]*]] = getelementptr inbounds
%struct.__block_byref_baz, %struct.__block_byref_baz* [[baz]], i32 0, i32 1
+// CHECK: store %struct.__block_byref_baz* [[baz]],
%struct.__block_byref_baz** [[bazref]]
+// CHECK: [[disposable:%[0-9a-z_]*]] = bitcast %struct.__block_byref_baz*
[[baz]] to i8*
+// CHECK: call void @_Block_object_dispose(i8* [[disposable]]
+
+int main() {
+ __block int baz = [&]() { return 0; }();
+ return 0;
+}
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r333246 - Make atomic non-member functions as nonnull
Author: jfb
Date: Thu May 24 17:07:09 2018
New Revision: 333246
URL: http://llvm.org/viewvc/llvm-project?rev=333246&view=rev
Log:
Make atomic non-member functions as nonnull
Summary:
As a companion to libc++ patch https://reviews.llvm.org/D47225, mark builtin
atomic non-member functions which accept pointers as nonnull.
The atomic non-member functions accept pointers to std::atomic /
std::atomic_flag as well as to the non-atomic value. These are all dereferenced
unconditionally when lowered, and therefore will fault if null. It's a tiny
gotcha for new users, especially when they pass in NULL as expected value
(instead of passing a pointer to a NULL value).
Reviewers: arphaman
Subscribers: aheejin, cfe-commits
Differential Revision: https://reviews.llvm.org/D47229
Modified:
cfe/trunk/lib/Sema/SemaChecking.cpp
cfe/trunk/test/Sema/atomic-ops.c
Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=333246&r1=333245&r2=333246&view=diff
==
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Thu May 24 17:07:09 2018
@@ -3451,9 +3451,10 @@ ExprResult Sema::SemaAtomicOpsOverloaded
return ExprError();
}
- // atomic_fetch_or takes a pointer to a volatile 'A'. We shouldn't let the
- // volatile-ness of the pointee-type inject itself into the result or the
- // other operands. Similarly atomic_load can take a pointer to a const 'A'.
+ // All atomic operations have an overload which takes a pointer to a volatile
+ // 'A'. We shouldn't let the volatile-ness of the pointee-type inject itself
+ // into the result or the other operands. Similarly atomic_load takes a
+ // pointer to a const 'A'.
ValType.removeLocalVolatile();
ValType.removeLocalConst();
QualType ResultType = ValType;
@@ -3466,16 +3467,27 @@ ExprResult Sema::SemaAtomicOpsOverloaded
// The type of a parameter passed 'by value'. In the GNU atomics, such
// arguments are actually passed as pointers.
QualType ByValType = ValType; // 'CP'
- if (!IsC11 && !IsN)
+ bool IsPassedByAddress = false;
+ if (!IsC11 && !IsN) {
ByValType = Ptr->getType();
+IsPassedByAddress = true;
+ }
- // The first argument --- the pointer --- has a fixed type; we
- // deduce the types of the rest of the arguments accordingly. Walk
- // the remaining arguments, converting them to the deduced value type.
- for (unsigned i = 1; i != TheCall->getNumArgs(); ++i) {
+ // The first argument's non-CV pointer type is used to deduce the type of
+ // subsequent arguments, except for:
+ // - weak flag (always converted to bool)
+ // - memory order (always converted to int)
+ // - scope (always converted to int)
+ for (unsigned i = 0; i != TheCall->getNumArgs(); ++i) {
QualType Ty;
if (i < NumVals[Form] + 1) {
switch (i) {
+ case 0:
+// The first argument is always a pointer. It has a fixed type.
+// It is always dereferenced, a nullptr is undefined.
+CheckNonNullArgument(*this, TheCall->getArg(i), DRE->getLocStart());
+// Nothing else to do: we already know all we want about this pointer.
+continue;
case 1:
// The second argument is the non-atomic operand. For arithmetic, this
// is always passed by value, and for a compare_exchange it is always
@@ -3484,14 +3496,16 @@ ExprResult Sema::SemaAtomicOpsOverloaded
assert(Form != Load);
if (Form == Init || (Form == Arithmetic && ValType->isIntegerType()))
Ty = ValType;
-else if (Form == Copy || Form == Xchg)
+else if (Form == Copy || Form == Xchg) {
+ if (IsPassedByAddress)
+// The value pointer is always dereferenced, a nullptr is
undefined.
+CheckNonNullArgument(*this, TheCall->getArg(i),
DRE->getLocStart());
Ty = ByValType;
-else if (Form == Arithmetic)
+} else if (Form == Arithmetic)
Ty = Context.getPointerDiffType();
else {
Expr *ValArg = TheCall->getArg(i);
- // Treat this argument as _Nonnull as we want to show a warning if
- // NULL is passed into it.
+ // The value pointer is always dereferenced, a nullptr is undefined.
CheckNonNullArgument(*this, ValArg, DRE->getLocStart());
LangAS AS = LangAS::Default;
// Keep address space of non-atomic pointer type.
@@ -3504,8 +3518,10 @@ ExprResult Sema::SemaAtomicOpsOverloaded
}
break;
case 2:
-// The third argument to compare_exchange / GNU exchange is a
-// (pointer to a) desired value.
+// The third argument to compare_exchange / GNU exchange is the desired
+// value, either by-value (for the *_n variant) or as a pointer.
+if (!IsN)
+ CheckNonNullArgument(*this, TheCall->getArg(i),
r333290 - Follow-up fix for nonnull atomic non-member functions
Author: jfb
Date: Fri May 25 10:36:49 2018
New Revision: 333290
URL: http://llvm.org/viewvc/llvm-project?rev=333290&view=rev
Log:
Follow-up fix for nonnull atomic non-member functions
Handling of the third parameter was only checking for *_n and not for the C11
variant, which means that cmpxchg of a 'desired' 0 value was erroneously
warning. Handle C11 properly, and add extgensive tests for this as well as NULL
pointers in a bunch of places.
Fixes r333246 from D47229.
Modified:
cfe/trunk/lib/Sema/SemaChecking.cpp
cfe/trunk/test/Sema/atomic-ops.c
Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=333290&r1=333289&r2=333290&view=diff
==
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Fri May 25 10:36:49 2018
@@ -3519,8 +3519,8 @@ ExprResult Sema::SemaAtomicOpsOverloaded
break;
case 2:
// The third argument to compare_exchange / GNU exchange is the desired
-// value, either by-value (for the *_n variant) or as a pointer.
-if (!IsN)
+// value, either by-value (for the C11 and *_n variant) or as a
pointer.
+if (IsPassedByAddress)
CheckNonNullArgument(*this, TheCall->getArg(i), DRE->getLocStart());
Ty = ByValType;
break;
Modified: cfe/trunk/test/Sema/atomic-ops.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/atomic-ops.c?rev=333290&r1=333289&r2=333290&view=diff
==
--- cfe/trunk/test/Sema/atomic-ops.c (original)
+++ cfe/trunk/test/Sema/atomic-ops.c Fri May 25 10:36:49 2018
@@ -530,11 +530,15 @@ void memory_checks(_Atomic(int) *Ap, int
(void)__atomic_compare_exchange_n(p, p, val, 0, memory_order_seq_cst,
memory_order_relaxed);
}
-void nullPointerWarning(_Atomic(int) *Ap, int *p, int val) {
+void nullPointerWarning() {
volatile _Atomic(int) vai;
_Atomic(int) ai;
volatile int vi = 42;
int i = 42;
+ volatile _Atomic(int*) vap;
+ _Atomic(int*) ap;
+ volatile int* vp = NULL;
+ int* p = NULL;
__c11_atomic_init((volatile _Atomic(int)*)0, 42); // expected-warning {{null
passed to a callee that requires a non-null argument}}
__c11_atomic_init((_Atomic(int)*)0, 42); // expected-warning {{null passed
to a callee that requires a non-null argument}}
@@ -607,4 +611,65 @@ void nullPointerWarning(_Atomic(int) *Ap
(void)__atomic_fetch_min((int*)0, 42, memory_order_relaxed); //
expected-warning {{null passed to a callee that requires a non-null argument}}
(void)__atomic_fetch_max((volatile int*)0, 42, memory_order_relaxed); //
expected-warning {{null passed to a callee that requires a non-null argument}}
(void)__atomic_fetch_max((int*)0, 42, memory_order_relaxed); //
expected-warning {{null passed to a callee that requires a non-null argument}}
+
+ // These don't warn: the "desired" parameter is passed by value. Even for
+ // atomic pointers the "desired" result can be NULL.
+ __c11_atomic_init(&vai, 0);
+ __c11_atomic_init(&ai, 0);
+ __c11_atomic_init(&vap, NULL);
+ __c11_atomic_init(&ap, NULL);
+ __c11_atomic_store(&vai, 0, memory_order_relaxed);
+ __c11_atomic_store(&ai, 0, memory_order_relaxed);
+ __c11_atomic_store(&vap, NULL, memory_order_relaxed);
+ __c11_atomic_store(&ap, NULL, memory_order_relaxed);
+ (void)__c11_atomic_exchange(&vai, 0, memory_order_relaxed);
+ (void)__c11_atomic_exchange(&ai, 0, memory_order_relaxed);
+ (void)__c11_atomic_exchange(&vap, NULL, memory_order_relaxed);
+ (void)__c11_atomic_exchange(&ap, NULL, memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_weak(&vai, &i, 0, memory_order_relaxed,
memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_weak(&ai, &i, 0, memory_order_relaxed,
memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_weak(&vap, &p, NULL,
memory_order_relaxed, memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_weak(&ap, &p, NULL,
memory_order_relaxed, memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_strong(&vai, &i, 0,
memory_order_relaxed, memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_strong(&ai, &i, 0, memory_order_relaxed,
memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_strong(&vap, &p, NULL,
memory_order_relaxed, memory_order_relaxed);
+ (void)__c11_atomic_compare_exchange_strong(&ap, &p, NULL,
memory_order_relaxed, memory_order_relaxed);
+ (void)__c11_atomic_fetch_add(&vai, 0, memory_order_relaxed);
+ (void)__c11_atomic_fetch_add(&ai, 0, memory_order_relaxed);
+ (void)__c11_atomic_fetch_sub(&vai, 0, memory_order_relaxed);
+ (void)__c11_atomic_fetch_sub(&ai, 0, memory_order_relaxed);
+ (void)__c11_atomic_fetch_and(&vai, 0, memory_order_relaxed);
+ (void)__c11_atomic_fetch_and(&ai, 0, memory_order_relaxed);
+ (void)__c11_atomic_fetch_or(&vai,
[libcxx] r333308 - Fix optional deduction guide test breakage
Author: jfb
Date: Fri May 25 13:43:57 2018
New Revision: 08
URL: http://llvm.org/viewvc/llvm-project?rev=08&view=rev
Log:
Fix optional deduction guide test breakage
Modified:
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.fail.cpp
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
Modified:
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.fail.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.fail.cpp?rev=08&r1=07&r2=08&view=diff
==
---
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.fail.cpp
(original)
+++
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.fail.cpp
Fri May 25 13:43:57 2018
@@ -28,7 +28,7 @@ int main()
// Test the implicit deduction guides
{
// optional()
-std::optional opt; // expected-error {{no viable constructor or
deduction guide for deduction of template arguments of 'optional'}}
+std::optional opt; // expected-error {{declaration of variable 'opt'
with deduced type 'std::optional' requires an initializer}}
}
{
Modified:
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp?rev=08&r1=07&r2=08&view=diff
==
---
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
(original)
+++
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
Fri May 25 13:43:57 2018
@@ -45,7 +45,7 @@ int main()
// optional(const optional &);
std::optional source('A');
std::optional opt(source);
-static_assert(std::is_same_v>, "");
+static_assert(std::is_same_v>>, "");
assert(static_cast(opt) == static_cast(source));
assert(*opt == *source);
}
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[libcxx] r333315 - Fix array deduction guide test breakage
Author: jfb
Date: Fri May 25 14:17:43 2018
New Revision: 15
URL: http://llvm.org/viewvc/llvm-project?rev=15&view=rev
Log:
Fix array deduction guide test breakage
No matching constructor
Modified:
libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp
Modified:
libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp?rev=15&r1=14&r2=15&view=diff
==
--- libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp
(original)
+++ libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp
Fri May 25 14:17:43 2018
@@ -51,6 +51,8 @@ int main()
}
// Test the implicit deduction guides
+// FIXME broken: no matching constructor
+#if 0
{
std::array source = {4.0, 5.0};
std::array arr(source); // array(array)
@@ -59,4 +61,5 @@ int main()
assert(arr[0] == 4.0);
assert(arr[1] == 5.0);
}
+#endif
}
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[libcxx] r333317 - Fix optional test breakage
Author: jfb
Date: Fri May 25 14:32:27 2018
New Revision: 17
URL: http://llvm.org/viewvc/llvm-project?rev=17&view=rev
Log:
Fix optional test breakage
It seems GCC and clang disagree. Talked to mclow on IRC, disabling for now.
Modified:
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
Modified:
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp?rev=17&r1=16&r2=17&view=diff
==
---
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
(original)
+++
libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp
Fri May 25 14:32:27 2018
@@ -43,11 +43,15 @@ int main()
{
// optional(const optional &);
+ // FIXME clang and GCC disagree about this!
+ // clang thinks opt is optional>, GCC thinks it's
optional.
+#if 0
std::optional source('A');
std::optional opt(source);
static_assert(std::is_same_v>>, "");
assert(static_cast(opt) == static_cast(source));
assert(*opt == *source);
+#endif
}
}
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[libcxx] r333325 - Add nonnull; use it for atomics
Author: jfb
Date: Fri May 25 16:43:53 2018
New Revision: 25
URL: http://llvm.org/viewvc/llvm-project?rev=25&view=rev
Log:
Add nonnull; use it for atomics
Summary:
The atomic non-member functions accept pointers to std::atomic /
std::atomic_flag as well as to the non-atomic value. These are all dereferenced
unconditionally when lowered, and therefore will fault if null. It's a tiny
gotcha for new users, especially when they pass in NULL as expected value
(instead of passing a pointer to a NULL value). We can therefore use the
nonnull attribute to denote that:
- A warning should be generated if the argument is null
- It is undefined behavior if the argument is null (because a dereference
will segfault)
This patch adds support for this attribute for clang and GCC, and sticks to the
subset of the syntax both supports. In particular, work around this GCC oddity:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60625
The attributes are documented:
- https://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Function-Attributes.html
- https://clang.llvm.org/docs/AttributeReference.html#nullability-attributes
I'm authoring a companion clang patch for the __c11_* and __atomic_* builtins,
which currently only warn on a subset of the pointer parameters.
In all cases the check needs to be explicit and not use the empty nonnull list,
because some of the overloads are for atomic and the values themselves are
allowed to be null.
Reviewers: arphaman, EricWF
Subscribers: aheejin, christof, cfe-commits
Differential Revision: https://reviews.llvm.org/D47225
Added:
libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp
Modified:
libcxx/trunk/include/__config
libcxx/trunk/include/atomic
Modified: libcxx/trunk/include/__config
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/__config?rev=25&r1=24&r2=25&view=diff
==
--- libcxx/trunk/include/__config (original)
+++ libcxx/trunk/include/__config Fri May 25 16:43:53 2018
@@ -1218,6 +1218,17 @@ _LIBCPP_FUNC_VIS extern "C" void __sanit
# endif
#endif
+#if __has_attribute(nonnull) || _GNUC_VER >= 400
+// Function pointer parameter must be non-null: warns on null parameter,
+// undefined behavior if the parameter is null. Omitting parameter indices
+// indicates that all parameters of pointer type cannot be null.
+//
+// Note: parameter indexing starts at 1.
+# define _LIBCPP_NONNULL(...) __attribute__((nonnull(__VA_ARGS__)))
+#else
+# define _LIBCPP_NONNULL(...)
+#endif
+
// Define availability macros.
#if defined(_LIBCPP_USE_AVAILABILITY_APPLE)
# define _LIBCPP_AVAILABILITY_SHARED_MUTEX
\
Modified: libcxx/trunk/include/atomic
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/atomic?rev=25&r1=24&r2=25&view=diff
==
--- libcxx/trunk/include/atomic (original)
+++ libcxx/trunk/include/atomic Fri May 25 16:43:53 2018
@@ -646,19 +646,23 @@ static inline _LIBCPP_CONSTEXPR int __to
} // namespace __gcc_atomic
template
+_LIBCPP_NONNULL(1)
static inline
typename enable_if<
__gcc_atomic::__can_assign::value>::type
-__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
+__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val)
+{
__a->__a_value = __val;
}
template
+_LIBCPP_NONNULL(1)
static inline
typename enable_if<
!__gcc_atomic::__can_assign::value &&
__gcc_atomic::__can_assign< _Atomic(_Tp)*, _Tp>::value>::type
-__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
+__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val)
+{
// [atomics.types.generic]p1 guarantees _Tp is trivially copyable. Because
// the default operator= in an object is not volatile, a byte-by-byte copy
// is required.
@@ -671,7 +675,9 @@ __c11_atomic_init(volatile _Atomic(_Tp)*
}
template
-static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val) {
+_LIBCPP_NONNULL(1)
+static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val)
+{
__a->__a_value = __val;
}
@@ -684,22 +690,28 @@ static inline void __c11_atomic_signal_f
}
template
+_LIBCPP_NONNULL(1)
static inline void __c11_atomic_store(volatile _Atomic(_Tp)* __a, _Tp __val,
- memory_order __order) {
+ memory_order __order)
+{
return __atomic_store(&__a->__a_value, &__val,
__gcc_atomic::__to_gcc_order(__order));
}
template
+_LIBCPP_NONNULL(1)
static inline void __c11_atomic_store(_Atomic(_Tp)* __a, _Tp __val,
- memory_order __order) {
+ memory_order __order)
+{
__atomic_store(&__a->__a_value, &__val,
__gcc_atomic::__to_gcc_order(__order));
}
template
+_LIBCPP_NONNULL(1)
static inline
[libcxx] r333327 - Fix GCC handling of ATOMIC_VAR_INIT
Author: jfb
Date: Fri May 25 17:13:53 2018
New Revision: 27
URL: http://llvm.org/viewvc/llvm-project?rev=27&view=rev
Log:
Fix GCC handling of ATOMIC_VAR_INIT
r25 from D47225 added warning checks, and the test was written to be C++11
correct by using ATOMIC_VAR_INIT (note that the committee fixed that
recently...). It seems like GCC can't handle ATOMIC_VAR_INIT well because it
generates 'type 'std::atomic' cannot be initialized with an initializer
list' on bot libcxx-libcxxabi-x86_64-linux-ubuntu-cxx03. Drop the
ATOMIC_VAR_INITs since they weren't required to test the diagnostics.
Modified:
libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp
Modified: libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp?rev=27&r1=26&r2=27&view=diff
==
--- libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp (original)
+++ libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp Fri May 25
17:13:53 2018
@@ -17,8 +17,8 @@
#include
int main() {
- std::atomic ai = ATOMIC_VAR_INIT(0);
- volatile std::atomic vai = ATOMIC_VAR_INIT(0);
+ std::atomic ai;
+ volatile std::atomic vai;
int i = 42;
atomic_is_lock_free((const volatile std::atomic*)0); // expected-error
{{null passed to a callee that requires a non-null argument}}
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[libcxx] r333351 - Revert "Add nonnull; use it for atomics"
Author: jfb
Date: Sat May 26 12:44:45 2018
New Revision: 51
URL: http://llvm.org/viewvc/llvm-project?rev=51&view=rev
Log:
Revert "Add nonnull; use it for atomics"
That's r25, as well as follow-up "Fix GCC handling of ATOMIC_VAR_INIT"
r27.
Marshall asked to revert:
Let's have a discussion about how to implement this so that it is more friendly
to people with installed code bases. We've had *extremely* loud responses to
unilaterally adding warnings - especially ones that can't be easily disabled -
to the libc++ code base in the past.
Removed:
libcxx/trunk/test/libcxx/atomics/diagnose_nonnull.fail.cpp
Modified:
libcxx/trunk/include/__config
libcxx/trunk/include/atomic
Modified: libcxx/trunk/include/__config
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/__config?rev=51&r1=50&r2=51&view=diff
==
--- libcxx/trunk/include/__config (original)
+++ libcxx/trunk/include/__config Sat May 26 12:44:45 2018
@@ -1218,17 +1218,6 @@ _LIBCPP_FUNC_VIS extern "C" void __sanit
# endif
#endif
-#if __has_attribute(nonnull) || _GNUC_VER >= 400
-// Function pointer parameter must be non-null: warns on null parameter,
-// undefined behavior if the parameter is null. Omitting parameter indices
-// indicates that all parameters of pointer type cannot be null.
-//
-// Note: parameter indexing starts at 1.
-# define _LIBCPP_NONNULL(...) __attribute__((nonnull(__VA_ARGS__)))
-#else
-# define _LIBCPP_NONNULL(...)
-#endif
-
// Define availability macros.
#if defined(_LIBCPP_USE_AVAILABILITY_APPLE)
# define _LIBCPP_AVAILABILITY_SHARED_MUTEX
\
Modified: libcxx/trunk/include/atomic
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/atomic?rev=51&r1=50&r2=51&view=diff
==
--- libcxx/trunk/include/atomic (original)
+++ libcxx/trunk/include/atomic Sat May 26 12:44:45 2018
@@ -646,23 +646,19 @@ static inline _LIBCPP_CONSTEXPR int __to
} // namespace __gcc_atomic
template
-_LIBCPP_NONNULL(1)
static inline
typename enable_if<
__gcc_atomic::__can_assign::value>::type
-__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val)
-{
+__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
__a->__a_value = __val;
}
template
-_LIBCPP_NONNULL(1)
static inline
typename enable_if<
!__gcc_atomic::__can_assign::value &&
__gcc_atomic::__can_assign< _Atomic(_Tp)*, _Tp>::value>::type
-__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val)
-{
+__c11_atomic_init(volatile _Atomic(_Tp)* __a, _Tp __val) {
// [atomics.types.generic]p1 guarantees _Tp is trivially copyable. Because
// the default operator= in an object is not volatile, a byte-by-byte copy
// is required.
@@ -675,9 +671,7 @@ __c11_atomic_init(volatile _Atomic(_Tp)*
}
template
-_LIBCPP_NONNULL(1)
-static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val)
-{
+static inline void __c11_atomic_init(_Atomic(_Tp)* __a, _Tp __val) {
__a->__a_value = __val;
}
@@ -690,28 +684,22 @@ static inline void __c11_atomic_signal_f
}
template
-_LIBCPP_NONNULL(1)
static inline void __c11_atomic_store(volatile _Atomic(_Tp)* __a, _Tp __val,
- memory_order __order)
-{
+ memory_order __order) {
return __atomic_store(&__a->__a_value, &__val,
__gcc_atomic::__to_gcc_order(__order));
}
template
-_LIBCPP_NONNULL(1)
static inline void __c11_atomic_store(_Atomic(_Tp)* __a, _Tp __val,
- memory_order __order)
-{
+ memory_order __order) {
__atomic_store(&__a->__a_value, &__val,
__gcc_atomic::__to_gcc_order(__order));
}
template
-_LIBCPP_NONNULL(1)
static inline _Tp __c11_atomic_load(volatile _Atomic(_Tp)* __a,
-memory_order __order)
-{
+memory_order __order) {
_Tp __ret;
__atomic_load(&__a->__a_value, &__ret,
__gcc_atomic::__to_gcc_order(__order));
@@ -719,9 +707,7 @@ static inline _Tp __c11_atomic_load(vola
}
template
-_LIBCPP_NONNULL(1)
-static inline _Tp __c11_atomic_load(_Atomic(_Tp)* __a, memory_order __order)
-{
+static inline _Tp __c11_atomic_load(_Atomic(_Tp)* __a, memory_order __order) {
_Tp __ret;
__atomic_load(&__a->__a_value, &__ret,
__gcc_atomic::__to_gcc_order(__order));
@@ -729,10 +715,8 @@ static inline _Tp __c11_atomic_load(_Ato
}
template
-_LIBCPP_NONNULL(1)
static inline _Tp __c11_atomic_exchange(volatile _Atomic(_Tp)* __a,
-_Tp __value, memory_order __order)
-{
+_Tp __value, memory_order __order) {
_Tp __ret;
__atomic_exchange(&__a->__a_va
Re: [libcxx] r333325 - Add nonnull; use it for atomics
> On May 26, 2018, at 12:36 PM, Marshall Clow wrote: > > > > On Fri, May 25, 2018 at 4:43 PM, JF Bastien via cfe-commits > mailto:cfe-commits@lists.llvm.org>> wrote: > Author: jfb > Date: Fri May 25 16:43:53 2018 > New Revision: 25 > > URL: http://llvm.org/viewvc/llvm-project?rev=25&view=rev > <http://llvm.org/viewvc/llvm-project?rev=25&view=rev> > Log: > Add nonnull; use it for atomics > > > JF - please revert this patch. r51 > Let's have a discussion about how to implement this so that it is more > friendly to people with installed code bases. > [ We've had *extremely* loud responses to unilaterally adding warnings - > especially ones that can't be easily disabled - to the libc++ code base in > the past. ] Ha! Interesting point which I hadn’t considered. I guess the clang warning can be controlled, but this one cannot? Agreed that’s suboptimal and we should figure out a way to make them controllable. > Also, please include both myself and EricWF on all libc++ reviews. Sorry, will do. I assumed you’d all have Herald auto-add if you wanted to be on a patch :-) ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [libcxx] r333325 - Add nonnull; use it for atomics
Hi Marshall, I’ve been thinking about this, and I propose we proceed the following way: Add a new warning to clang, -Wnonnull-attribute (modulo name bikeshed), which is part of the nonnull group and on by default. That warning specifically controls warnings generated by usage of the nonnull attribute in code. Wait a week or two so out-of-sync clang / libc++ codebases can catch up. Un-revert r51, adding the nonnull attributes to non-member atomic functions. That should address the concern you raised because library users can now silence the warning. In this case I think it’s fine to have the warning on by default because: It’s hard to trigger, you need to directly pass null to the functions, copying a null into the function won’t warn. The warning has zero false-positives. The code will definitely segfault when you call it. What do you think? Thanks, JF > On May 26, 2018, at 12:50 PM, JF Bastien via cfe-commits > wrote: > > > >> On May 26, 2018, at 12:36 PM, Marshall Clow > <mailto:mclow.li...@gmail.com>> wrote: >> >> >> >> On Fri, May 25, 2018 at 4:43 PM, JF Bastien via cfe-commits >> mailto:cfe-commits@lists.llvm.org>> wrote: >> Author: jfb >> Date: Fri May 25 16:43:53 2018 >> New Revision: 25 >> >> URL: http://llvm.org/viewvc/llvm-project?rev=25&view=rev >> <http://llvm.org/viewvc/llvm-project?rev=25&view=rev> >> Log: >> Add nonnull; use it for atomics >> >> >> JF - please revert this patch. > > r51 > >> Let's have a discussion about how to implement this so that it is more >> friendly to people with installed code bases. >> [ We've had *extremely* loud responses to unilaterally adding warnings - >> especially ones that can't be easily disabled - to the libc++ code base in >> the past. ] > > Ha! Interesting point which I hadn’t considered. I guess the clang warning > can be controlled, but this one cannot? Agreed that’s suboptimal and we > should figure out a way to make them controllable. > > >> Also, please include both myself and EricWF on all libc++ reviews. > > Sorry, will do. I assumed you’d all have Herald auto-add if you wanted to be > on a patch :-) > > > ___ > cfe-commits mailing list > cfe-commits@lists.llvm.org <mailto:cfe-commits@lists.llvm.org> > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits > <http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits> ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[libcxx] r333479 - Mark deduction guide tests as failing on apple-clang-9
Author: jfb Date: Tue May 29 16:28:04 2018 New Revision: 333479 URL: http://llvm.org/viewvc/llvm-project?rev=333479&view=rev Log: Mark deduction guide tests as failing on apple-clang-9 As discussed here: http://lists.llvm.org/pipermail/cfe-dev/2018-May/058116.html The tests fail on clang-5, as well as apple-clang-9. Mark them as such. Modified: libcxx/trunk/test/std/containers/container.adaptors/queue/queue.cons/deduct.pass.cpp libcxx/trunk/test/std/containers/container.adaptors/stack/stack.cons/deduct.pass.cpp libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp Modified: libcxx/trunk/test/std/containers/container.adaptors/queue/queue.cons/deduct.pass.cpp URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/containers/container.adaptors/queue/queue.cons/deduct.pass.cpp?rev=333479&r1=333478&r2=333479&view=diff == --- libcxx/trunk/test/std/containers/container.adaptors/queue/queue.cons/deduct.pass.cpp (original) +++ libcxx/trunk/test/std/containers/container.adaptors/queue/queue.cons/deduct.pass.cpp Tue May 29 16:28:04 2018 @@ -9,7 +9,7 @@ // // UNSUPPORTED: c++98, c++03, c++11, c++14 -// UNSUPPORTED: clang-5 +// UNSUPPORTED: clang-5, apple-clang-9 // UNSUPPORTED: libcpp-no-deduction-guides // Clang 5 will generate bad implicit deduction guides // Specifically, for the copy constructor. Modified: libcxx/trunk/test/std/containers/container.adaptors/stack/stack.cons/deduct.pass.cpp URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/containers/container.adaptors/stack/stack.cons/deduct.pass.cpp?rev=333479&r1=333478&r2=333479&view=diff == --- libcxx/trunk/test/std/containers/container.adaptors/stack/stack.cons/deduct.pass.cpp (original) +++ libcxx/trunk/test/std/containers/container.adaptors/stack/stack.cons/deduct.pass.cpp Tue May 29 16:28:04 2018 @@ -9,7 +9,7 @@ // // UNSUPPORTED: c++98, c++03, c++11, c++14 -// UNSUPPORTED: clang-5 +// UNSUPPORTED: clang-5, apple-clang-9 // UNSUPPORTED: libcpp-no-deduction-guides // Clang 5 will generate bad implicit deduction guides // Specifically, for the copy constructor. Modified: libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp?rev=333479&r1=333478&r2=333479&view=diff == --- libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp (original) +++ libcxx/trunk/test/std/containers/sequences/array/array.cons/deduct.pass.cpp Tue May 29 16:28:04 2018 @@ -9,7 +9,7 @@ // // UNSUPPORTED: c++98, c++03, c++11, c++14 -// UNSUPPORTED: clang-5 +// UNSUPPORTED: clang-5, apple-clang-9 // UNSUPPORTED: libcpp-no-deduction-guides // Clang 5 will generate bad implicit deduction guides // Specifically, for the copy constructor. Modified: libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp?rev=333479&r1=333478&r2=333479&view=diff == --- libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp (original) +++ libcxx/trunk/test/std/utilities/optional/optional.object/optional.object.ctor/deduct.pass.cpp Tue May 29 16:28:04 2018 @@ -9,7 +9,7 @@ // // UNSUPPORTED: c++98, c++03, c++11, c++14 -// UNSUPPORTED: clang-5 +// UNSUPPORTED: clang-5, apple-clang-9 // UNSUPPORTED: libcpp-no-deduction-guides // Clang 5 will generate bad implicit deduction guides // Specifically, for the copy constructor. ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r341860 - Implement -Watomic-implicit-seq-cst
Author: jfb
Date: Mon Sep 10 13:42:56 2018
New Revision: 341860
URL: http://llvm.org/viewvc/llvm-project?rev=341860&view=rev
Log:
Implement -Watomic-implicit-seq-cst
Summary:
_Atomic and __sync_* operations are implicitly sequentially-consistent. Some
codebases want to force explicit usage of memory order instead. This warning
allows them to know where implicit sequentially-consistent memory order is used.
The warning isn't on by default because _Atomic was purposefully designed to
have seq_cst as the default: the idea was that it's the right thing to use most
of the time. This warning allows developers who disagree to enforce explicit
usage instead.
A follow-up patch will take care of C++'s std::atomic. It'll be different enough
from this patch that I think it should be separate: for C++ the atomic
operations all have a memory order parameter (or two), but it's defaulted. I
believe this warning should trigger when the default is used, but not when
seq_cst is used explicitly (or implicitly as the failure order for cmpxchg).
Reviewers: rjmccall
Subscribers: dexonsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D51084
Added:
cfe/trunk/test/Sema/atomic-implicit-seq_cst.c
cfe/trunk/test/Sema/sync-implicit-seq_cst.c
Modified:
cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
cfe/trunk/lib/Sema/SemaChecking.cpp
Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=341860&r1=341859&r2=341860&view=diff
==
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Mon Sep 10 13:42:56
2018
@@ -7096,6 +7096,9 @@ def err_atomic_op_has_invalid_synch_scop
def warn_atomic_op_misaligned : Warning<
"%select{large|misaligned}0 atomic operation may incur "
"significant performance penalty">, InGroup>;
+def warn_atomic_implicit_seq_cst : Warning<
+ "implicit use of sequentially-consistent atomic may incur stronger memory
barriers than necessary">,
+ InGroup>, DefaultIgnore;
def err_overflow_builtin_must_be_int : Error<
"operand argument to overflow builtin must be an integer (%0 invalid)">;
Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=341860&r1=341859&r2=341860&view=diff
==
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Mon Sep 10 13:42:56 2018
@@ -1134,6 +1134,10 @@ Sema::CheckBuiltinFunctionCall(FunctionD
case Builtin::BI__sync_swap_8:
case Builtin::BI__sync_swap_16:
return SemaBuiltinAtomicOverloaded(TheCallResult);
+ case Builtin::BI__sync_synchronize:
+Diag(TheCall->getBeginLoc(), diag::warn_atomic_implicit_seq_cst)
+<< TheCall->getCallee()->getSourceRange();
+break;
case Builtin::BI__builtin_nontemporal_load:
case Builtin::BI__builtin_nontemporal_store:
return SemaBuiltinNontemporalOverloaded(TheCallResult);
@@ -4646,25 +4650,24 @@ static bool checkBuiltinArgument(Sema &S
return false;
}
-/// SemaBuiltinAtomicOverloaded - We have a call to a function like
-/// __sync_fetch_and_add, which is an overloaded function based on the pointer
-/// type of its first argument. The main ActOnCallExpr routines have already
-/// promoted the types of arguments because all of these calls are prototyped
as
-/// void(...).
+/// We have a call to a function like __sync_fetch_and_add, which is an
+/// overloaded function based on the pointer type of its first argument.
+/// The main ActOnCallExpr routines have already promoted the types of
+/// arguments because all of these calls are prototyped as void(...).
///
/// This function goes through and does final semantic checking for these
-/// builtins,
+/// builtins, as well as generating any warnings.
ExprResult
Sema::SemaBuiltinAtomicOverloaded(ExprResult TheCallResult) {
- CallExpr *TheCall = (CallExpr *)TheCallResult.get();
- DeclRefExpr *DRE
=cast(TheCall->getCallee()->IgnoreParenCasts());
+ CallExpr *TheCall = static_cast(TheCallResult.get());
+ Expr *Callee = TheCall->getCallee();
+ DeclRefExpr *DRE = cast(Callee->IgnoreParenCasts());
FunctionDecl *FDecl = cast(DRE->getDecl());
// Ensure that we have at least one argument to do type inference from.
if (TheCall->getNumArgs() < 1) {
Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args_at_least)
-<< 0 << 1 << TheCall->getNumArgs()
-<< TheCall->getCallee()->getSourceRange();
+<< 0 << 1 << TheCall->getNumArgs() << Callee->getSourceRange();
return ExprError();
}
@@ -4941,13 +4944,16 @@ Sema::SemaBuiltinAtomicOverloaded(ExprRe
if (TheCall->getNumArgs() < 1+NumFixed) {
Diag(TheCall->getEndLoc(), diag::err_typ
r337636 - [NFC] CodeGen: rename memset to bzero
Author: jfb
Date: Fri Jul 20 16:37:12 2018
New Revision: 337636
URL: http://llvm.org/viewvc/llvm-project?rev=337636&view=rev
Log:
[NFC] CodeGen: rename memset to bzero
The optimization looks for opportunities to emit bzero, not memset. Rename the
functions accordingly (and clang-format the diff) because I want to add a
fallback optimization which actually tries to generate memset. bzero is still
better and it would confuse the code to merge both.
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=337636&r1=337635&r2=337636&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Fri Jul 20 16:37:12 2018
@@ -846,11 +846,10 @@ void CodeGenFunction::EmitScalarInit(con
EmitStoreOfScalar(value, lvalue, /* isInitialization */ true);
}
-/// canEmitInitWithFewStoresAfterMemset - Decide whether we can emit the
-/// non-zero parts of the specified initializer with equal or fewer than
-/// NumStores scalar stores.
-static bool canEmitInitWithFewStoresAfterMemset(llvm::Constant *Init,
-unsigned &NumStores) {
+/// Decide whether we can emit the non-zero parts of the specified initializer
+/// with equal or fewer than NumStores scalar stores.
+static bool canEmitInitWithFewStoresAfterBZero(llvm::Constant *Init,
+ unsigned &NumStores) {
// Zero and Undef never requires any extra stores.
if (isa(Init) ||
isa(Init) ||
@@ -865,7 +864,7 @@ static bool canEmitInitWithFewStoresAfte
if (isa(Init) || isa(Init)) {
for (unsigned i = 0, e = Init->getNumOperands(); i != e; ++i) {
llvm::Constant *Elt = cast(Init->getOperand(i));
- if (!canEmitInitWithFewStoresAfterMemset(Elt, NumStores))
+ if (!canEmitInitWithFewStoresAfterBZero(Elt, NumStores))
return false;
}
return true;
@@ -875,7 +874,7 @@ static bool canEmitInitWithFewStoresAfte
dyn_cast(Init)) {
for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
llvm::Constant *Elt = CDS->getElementAsConstant(i);
- if (!canEmitInitWithFewStoresAfterMemset(Elt, NumStores))
+ if (!canEmitInitWithFewStoresAfterBZero(Elt, NumStores))
return false;
}
return true;
@@ -885,15 +884,13 @@ static bool canEmitInitWithFewStoresAfte
return false;
}
-/// emitStoresForInitAfterMemset - For inits that
-/// canEmitInitWithFewStoresAfterMemset returned true for, emit the scalar
-/// stores that would be required.
-static void emitStoresForInitAfterMemset(CodeGenModule &CGM,
- llvm::Constant *Init, Address Loc,
- bool isVolatile,
- CGBuilderTy &Builder) {
+/// For inits that canEmitInitWithFewStoresAfterBZero returned true for, emit
+/// the scalar stores that would be required.
+static void emitStoresForInitAfterBZero(CodeGenModule &CGM,
+llvm::Constant *Init, Address Loc,
+bool isVolatile, CGBuilderTy &Builder)
{
assert(!Init->isNullValue() && !isa(Init) &&
- "called emitStoresForInitAfterMemset for zero or undef value.");
+ "called emitStoresForInitAfterBZero for zero or undef value.");
if (isa(Init) || isa(Init) ||
isa(Init) || isa(Init) ||
@@ -909,7 +906,7 @@ static void emitStoresForInitAfterMemset
// If necessary, get a pointer to the element and emit it.
if (!Elt->isNullValue() && !isa(Elt))
-emitStoresForInitAfterMemset(
+emitStoresForInitAfterBZero(
CGM, Elt,
Builder.CreateConstInBoundsGEP2_32(Loc, 0, i, CGM.getDataLayout()),
isVolatile, Builder);
@@ -925,20 +922,19 @@ static void emitStoresForInitAfterMemset
// If necessary, get a pointer to the element and emit it.
if (!Elt->isNullValue() && !isa(Elt))
- emitStoresForInitAfterMemset(
+ emitStoresForInitAfterBZero(
CGM, Elt,
Builder.CreateConstInBoundsGEP2_32(Loc, 0, i, CGM.getDataLayout()),
isVolatile, Builder);
}
}
-/// shouldUseMemSetPlusStoresToInitialize - Decide whether we should use memset
-/// plus some stores to initialize a local variable instead of using a memcpy
-/// from a constant global. It is beneficial to use memset if the global is
all
-/// zeros, or mostly zeros and large.
-static bool shouldUseMemSetPlusStoresToInitialize(llvm::Constant *Init,
- uint64_t GlobalSize) {
- // If a global is all zeros, always use a memset.
+/// Decide whether we should use bzero plus some stores to initialize a local
+/// variable instead of using a memcpy from a constant global. It is
r337887 - CodeGen: use non-zero memset when possible for automatic variables
Author: jfb
Date: Tue Jul 24 21:29:03 2018
New Revision: 337887
URL: http://llvm.org/viewvc/llvm-project?rev=337887&view=rev
Log:
CodeGen: use non-zero memset when possible for automatic variables
Summary:
Right now automatic variables are either initialized with bzero followed by a
few stores, or memcpy'd from a synthesized global. We end up encountering a
fair amount of code where memcpy of non-zero byte patterns would be better than
memcpy from a global because it touches less memory and generates a smaller
binary. The optimizer could reason about this, but it's not really worth it
when clang already knows.
This code could definitely be more clever but I'm not sure it's worth it. In
particular we could track a histogram of bytes seen and figure out (as we do
with bzero) if a memset could be followed by a handful of stores. Similarly, we
could tune the heuristics for GlobalSize, but using the same as for bzero seems
conservatively OK for now.
Reviewers: dexonsmith
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D49771
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/test/CodeGen/init.c
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=337887&r1=337886&r2=337887&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Tue Jul 24 21:29:03 2018
@@ -948,6 +948,113 @@ static bool shouldUseBZeroPlusStoresToIn
canEmitInitWithFewStoresAfterBZero(Init, StoreBudget);
}
+/// A byte pattern.
+///
+/// Can be "any" pattern if the value was padding or known to be undef.
+/// Can be "none" pattern if a sequence doesn't exist.
+class BytePattern {
+ uint8_t Val;
+ enum class ValueType : uint8_t { Specific, Any, None } Type;
+ BytePattern(ValueType Type) : Type(Type) {}
+
+public:
+ BytePattern(uint8_t Value) : Val(Value), Type(ValueType::Specific) {}
+ static BytePattern Any() { return BytePattern(ValueType::Any); }
+ static BytePattern None() { return BytePattern(ValueType::None); }
+ bool isAny() const { return Type == ValueType::Any; }
+ bool isNone() const { return Type == ValueType::None; }
+ bool isValued() const { return Type == ValueType::Specific; }
+ uint8_t getValue() const {
+assert(isValued());
+return Val;
+ }
+ BytePattern merge(const BytePattern Other) const {
+if (isNone() || Other.isNone())
+ return None();
+if (isAny())
+ return Other;
+if (Other.isAny())
+ return *this;
+if (getValue() == Other.getValue())
+ return *this;
+return None();
+ }
+};
+
+/// Figures out whether the constant can be initialized with memset.
+static BytePattern constantIsRepeatedBytePattern(llvm::Constant *C) {
+ if (isa(C) || isa(C))
+return BytePattern(0x00);
+ if (isa(C))
+return BytePattern::Any();
+
+ if (isa(C)) {
+auto *Int = cast(C);
+if (Int->getBitWidth() % 8 != 0)
+ return BytePattern::None();
+const llvm::APInt &Value = Int->getValue();
+if (Value.isSplat(8))
+ return BytePattern(Value.getLoBits(8).getLimitedValue());
+return BytePattern::None();
+ }
+
+ if (isa(C)) {
+auto *FP = cast(C);
+llvm::APInt Bits = FP->getValueAPF().bitcastToAPInt();
+if (Bits.getBitWidth() % 8 != 0)
+ return BytePattern::None();
+if (!Bits.isSplat(8))
+ return BytePattern::None();
+return BytePattern(Bits.getLimitedValue() & 0xFF);
+ }
+
+ if (isa(C)) {
+llvm::Constant *Splat = cast(C)->getSplatValue();
+if (Splat)
+ return constantIsRepeatedBytePattern(Splat);
+return BytePattern::None();
+ }
+
+ if (isa(C) || isa(C)) {
+BytePattern Pattern(BytePattern::Any());
+for (unsigned I = 0, E = C->getNumOperands(); I != E; ++I) {
+ llvm::Constant *Elt = cast(C->getOperand(I));
+ Pattern = Pattern.merge(constantIsRepeatedBytePattern(Elt));
+ if (Pattern.isNone())
+return Pattern;
+}
+return Pattern;
+ }
+
+ if (llvm::ConstantDataSequential *CDS =
+ dyn_cast(C)) {
+BytePattern Pattern(BytePattern::Any());
+for (unsigned I = 0, E = CDS->getNumElements(); I != E; ++I) {
+ llvm::Constant *Elt = CDS->getElementAsConstant(I);
+ Pattern = Pattern.merge(constantIsRepeatedBytePattern(Elt));
+ if (Pattern.isNone())
+return Pattern;
+}
+return Pattern;
+ }
+
+ // BlockAddress, ConstantExpr, and everything else is scary.
+ return BytePattern::None();
+}
+
+/// Decide whether we should use memset to initialize a local variable instead
+/// of using a memcpy from a constant global. Assumes we've already decided to
+/// not user bzero.
+/// FIXME We could be more clever, as we are for bzero above, and generate
+/// memset followed by stores. It's unclear that's worth the effort.
+static BytePattern shouldUseMemSetToInitialize(llvm::Constant *Init,
+
r338743 - __c11_atomic_load's _Atomic can be const
Author: jfb
Date: Thu Aug 2 10:35:46 2018
New Revision: 338743
URL: http://llvm.org/viewvc/llvm-project?rev=338743&view=rev
Log:
__c11_atomic_load's _Atomic can be const
Summary:
C++11 onwards specs the non-member functions atomic_load and
atomic_load_explicit as taking the atomic by const (potentially volatile)
pointer. C11, in its infinite wisdom, decided to drop the const, and C17 will
fix this with DR459 (the current draft forgot to fix B.16, but that’s not the
normative part).
clang’s lib/Headers/stdatomic.h implements these as #define to the __c11_*
equivalent, which are builtins with custom typecheck. Fix the typecheck.
D47613 takes care of the libc++ side.
Discussion: http://lists.llvm.org/pipermail/cfe-dev/2018-May/058129.html
Reviewers: rsmith
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D47618
Modified:
cfe/trunk/lib/Sema/SemaChecking.cpp
cfe/trunk/test/Sema/atomic-ops.c
cfe/trunk/test/SemaOpenCL/atomic-ops.cl
Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=338743&r1=338742&r2=338743&view=diff
==
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Thu Aug 2 10:35:46 2018
@@ -4347,7 +4347,7 @@ ExprResult Sema::SemaAtomicOpsOverloaded
<< Ptr->getType() << Ptr->getSourceRange();
return ExprError();
}
-if (AtomTy.isConstQualified() ||
+if ((Form != Load && Form != LoadCopy && AtomTy.isConstQualified()) ||
AtomTy.getAddressSpace() == LangAS::opencl_constant) {
Diag(DRE->getLocStart(), diag::err_atomic_op_needs_non_const_atomic)
<< (AtomTy.isConstQualified() ? 0 : 1) << Ptr->getType()
Modified: cfe/trunk/test/Sema/atomic-ops.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/atomic-ops.c?rev=338743&r1=338742&r2=338743&view=diff
==
--- cfe/trunk/test/Sema/atomic-ops.c (original)
+++ cfe/trunk/test/Sema/atomic-ops.c Thu Aug 2 10:35:46 2018
@@ -115,7 +115,7 @@ void f(_Atomic(int) *i, const _Atomic(in
__c11_atomic_load(i, memory_order_seq_cst);
__c11_atomic_load(p, memory_order_seq_cst);
__c11_atomic_load(d, memory_order_seq_cst);
- __c11_atomic_load(ci, memory_order_seq_cst); // expected-error {{address
argument to atomic operation must be a pointer to non-const _Atomic type
('const _Atomic(int) *' invalid)}}
+ __c11_atomic_load(ci, memory_order_seq_cst);
int load_n_1 = __atomic_load_n(I, memory_order_relaxed);
int *load_n_2 = __atomic_load_n(P, memory_order_relaxed);
@@ -222,7 +222,7 @@ void f(_Atomic(int) *i, const _Atomic(in
__c11_atomic_init(ci, 0); // expected-error {{address argument to atomic
operation must be a pointer to non-const _Atomic type ('const _Atomic(int) *'
invalid)}}
__c11_atomic_store(ci, 0, memory_order_release); // expected-error {{address
argument to atomic operation must be a pointer to non-const _Atomic type
('const _Atomic(int) *' invalid)}}
- __c11_atomic_load(ci, memory_order_acquire); // expected-error {{address
argument to atomic operation must be a pointer to non-const _Atomic type
('const _Atomic(int) *' invalid)}}
+ __c11_atomic_load(ci, memory_order_acquire);
// Ensure the macros behave appropriately.
atomic_int n = ATOMIC_VAR_INIT(123);
Modified: cfe/trunk/test/SemaOpenCL/atomic-ops.cl
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaOpenCL/atomic-ops.cl?rev=338743&r1=338742&r2=338743&view=diff
==
--- cfe/trunk/test/SemaOpenCL/atomic-ops.cl (original)
+++ cfe/trunk/test/SemaOpenCL/atomic-ops.cl Thu Aug 2 10:35:46 2018
@@ -58,7 +58,8 @@ void f(atomic_int *i, const atomic_int *
__opencl_atomic_load(i, memory_order_seq_cst, memory_scope_work_group);
__opencl_atomic_load(p, memory_order_seq_cst, memory_scope_work_group);
__opencl_atomic_load(d, memory_order_seq_cst, memory_scope_work_group);
- __opencl_atomic_load(ci, memory_order_seq_cst, memory_scope_work_group); //
expected-error {{address argument to atomic operation must be a pointer to
non-const _Atomic type ('const __generic atomic_int *' (aka 'const __generic
_Atomic(int) *') invalid)}}
+ __opencl_atomic_load(ci, memory_order_seq_cst, memory_scope_work_group);
+ __opencl_atomic_load(i_c, memory_order_seq_cst, memory_scope_work_group); //
expected-error {{address argument to atomic operation must be a pointer to
non-constant _Atomic type ('__constant atomic_int *' (aka '__constant
_Atomic(int) *') invalid)}}
__opencl_atomic_store(i, 1, memory_order_seq_cst, memory_scope_work_group);
__opencl_atomic_store(p, 1, memory_order_seq_cst, memory_scope_work_group);
@@ -94,7 +95,7 @@ void f(atomic_int *i, const atomic_int *
__opencl_atomic_init(ci, 0); // expected-err
[libcxx] r333723 - Filesystem tests: un-confuse write time
Author: jfb
Date: Thu May 31 21:59:48 2018
New Revision: 333723
URL: http://llvm.org/viewvc/llvm-project?rev=333723&view=rev
Log:
Filesystem tests: un-confuse write time
Summary:
The filesystem test was confused about access versus write / modification time.
The spec says:
file_time_type last_write_time(const path& p, error_code& ec) noexcept;
Returns: The time of last data modification of p, determined as if by the
value of the POSIX stat structure member st_mtime obtained as if by POSIX
stat(). The signature with argument ec returns file_time_type::min() if an
error occurs.
The test was looking at st_atime, not st_mtime, when comparing the result from
last_write_time. That was probably due to using a pair instead of naming things
nicely or using types. I opted to rename things so it's clearer.
This used to cause test bot failures.
Reviewers: EricWF, mclow.lists, aemerson
Subscribers: christof, cfe-commits
Differential Revision: https://reviews.llvm.org/D47557
Modified:
libcxx/trunk/test/std/experimental/filesystem/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
Modified:
libcxx/trunk/test/std/experimental/filesystem/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/std/experimental/filesystem/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp?rev=333723&r1=333722&r2=333723&view=diff
==
---
libcxx/trunk/test/std/experimental/filesystem/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
(original)
+++
libcxx/trunk/test/std/experimental/filesystem/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
Thu May 31 21:59:48 2018
@@ -32,7 +32,9 @@
using namespace fs;
-std::pair GetTimes(path const& p) {
+struct Times { std::time_t access, write; };
+
+Times GetTimes(path const& p) {
using Clock = file_time_type::clock;
struct ::stat st;
if (::stat(p.c_str(), &st) == -1) {
@@ -48,11 +50,11 @@ std::pair GetT
}
std::time_t LastAccessTime(path const& p) {
-return GetTimes(p).first;
+return GetTimes(p).access;
}
std::time_t LastWriteTime(path const& p) {
-return GetTimes(p).second;
+return GetTimes(p).write;
}
std::pair GetSymlinkTimes(path const& p) {
@@ -228,11 +230,9 @@ TEST_CASE(get_last_write_time_dynamic_en
const path dir = env.create_dir("dir");
const auto file_times = GetTimes(file);
-const std::time_t file_access_time = file_times.first;
-const std::time_t file_write_time = file_times.second;
+const std::time_t file_write_time = file_times.write;
const auto dir_times = GetTimes(dir);
-const std::time_t dir_access_time = dir_times.first;
-const std::time_t dir_write_time = dir_times.second;
+const std::time_t dir_write_time = dir_times.write;
file_time_type ftime = last_write_time(file);
TEST_CHECK(Clock::to_time_t(ftime) == file_write_time);
@@ -253,9 +253,8 @@ TEST_CASE(get_last_write_time_dynamic_en
TEST_CHECK(ftime2 > ftime);
TEST_CHECK(dtime2 > dtime);
-TEST_CHECK(LastAccessTime(file) == file_access_time ||
- LastAccessTime(file) == Clock::to_time_t(ftime2));
-TEST_CHECK(LastAccessTime(dir) == dir_access_time);
+TEST_CHECK(LastWriteTime(file) == Clock::to_time_t(ftime2));
+TEST_CHECK(LastWriteTime(dir) == Clock::to_time_t(dtime2));
}
@@ -301,7 +300,7 @@ TEST_CASE(set_last_write_time_dynamic_en
};
for (const auto& TC : cases) {
const auto old_times = GetTimes(TC.p);
-file_time_type old_time(Sec(old_times.second));
+file_time_type old_time(Sec(old_times.write));
std::error_code ec = GetTestEC();
last_write_time(TC.p, TC.new_time, ec);
@@ -318,7 +317,7 @@ TEST_CASE(set_last_write_time_dynamic_en
TEST_CHECK(got_time <= TC.new_time + Sec(1));
TEST_CHECK(got_time >= TC.new_time - Sec(1));
}
-TEST_CHECK(LastAccessTime(TC.p) == old_times.first);
+TEST_CHECK(LastAccessTime(TC.p) == old_times.access);
}
}
}
@@ -348,10 +347,10 @@ TEST_CASE(last_write_time_symlink_test)
file_time_type got_time = last_write_time(sym);
std::time_t got_time_t = Clock::to_time_t(got_time);
-TEST_CHECK(got_time_t != old_times.second);
+TEST_CHECK(got_time_t != old_times.write);
TEST_CHECK(got_time_t == new_time_t);
TEST_CHECK(LastWriteTime(file) == new_time_t);
-TEST_CHECK(LastAccessTime(sym) == old_times.first);
+TEST_CHECK(LastAccessTime(sym) == old_times.access);
TEST_CHECK(GetSymlinkTimes(sym) == old_sym_times);
}
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[libcxx] r333776 - Mark __c11_atomic_load as const
Author: jfb
Date: Fri Jun 1 11:02:53 2018
New Revision: 333776
URL: http://llvm.org/viewvc/llvm-project?rev=333776&view=rev
Log:
Mark __c11_atomic_load as const
Summary:
C++11 onwards specs the non-member functions atomic_load and
atomic_load_explicit as taking the atomic by const (potentially volatile)
pointer. C11, in its infinite wisdom, decided to drop the const, and C17 will
fix this with DR459 (the current draft forgot to fix B.16, but that’s not the
normative part).
This patch fixes the libc++ version of the __c11_atomic_load builtins defined
for GCC's compatibility sake.
D47618 takes care of the clang side.
Discussion: http://lists.llvm.org/pipermail/cfe-dev/2018-May/058129.html
Reviewers: EricWF, mclow.lists
Subscribers: christof, cfe-commits
Differential Revision: https://reviews.llvm.org/D47613
Modified:
libcxx/trunk/include/atomic
Modified: libcxx/trunk/include/atomic
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/atomic?rev=333776&r1=333775&r2=333776&view=diff
==
--- libcxx/trunk/include/atomic (original)
+++ libcxx/trunk/include/atomic Fri Jun 1 11:02:53 2018
@@ -698,7 +698,7 @@ static inline void __c11_atomic_store(_A
}
template
-static inline _Tp __c11_atomic_load(volatile _Atomic(_Tp)* __a,
+static inline _Tp __c11_atomic_load(const volatile _Atomic(_Tp)* __a,
memory_order __order) {
_Tp __ret;
__atomic_load(&__a->__a_value, &__ret,
@@ -707,7 +707,7 @@ static inline _Tp __c11_atomic_load(vola
}
template
-static inline _Tp __c11_atomic_load(_Atomic(_Tp)* __a, memory_order __order) {
+static inline _Tp __c11_atomic_load(const _Atomic(_Tp)* __a, memory_order
__order) {
_Tp __ret;
__atomic_load(&__a->__a_value, &__ret,
__gcc_atomic::__to_gcc_order(__order));
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r335393 - [Sema] -Wformat-pedantic only for NSInteger/NSUInteger %zu/%zi on Darwin
Author: jfb
Date: Fri Jun 22 14:54:40 2018
New Revision: 335393
URL: http://llvm.org/viewvc/llvm-project?rev=335393&view=rev
Log:
[Sema] -Wformat-pedantic only for NSInteger/NSUInteger %zu/%zi on Darwin
Summary:
Pick D42933 back up, and make NSInteger/NSUInteger with %zu/%zi specifiers on
Darwin warn only in pedantic mode. The default -Wformat recently started
warning for the following code because of the added support for analysis for
the '%zi' specifier.
NSInteger i = NSIntegerMax;
NSLog(@"max NSInteger = %zi", i);
The problem is that on armv7 %zi is 'long', and NSInteger is typedefed to 'int'
in Foundation. We should avoid this warning as it's inconvenient to our users:
it's target specific (happens only on armv7 and not arm64), and breaks their
existing code. We should also silence the warning for the '%zu' specifier to
ensure consistency. This is acceptable because Darwin guarantees that, despite
the unfortunate choice of typedef, sizeof(size_t) == sizeof(NS[U]Integer), the
warning is therefore noisy for pedantic reasons. Once this is in I'll update
public documentation.
Related discussion on cfe-dev:
http://lists.llvm.org/pipermail/cfe-dev/2018-May/058050.html
Reviewers: ahatanak, vsapsai, alexshap, aaron.ballman, javed.absar, jfb,
rjmccall
Subscribers: kristof.beyls, aheejin, cfe-commits
Differential Revision: https://reviews.llvm.org/D47290
Added:
cfe/trunk/test/FixIt/fixit-format-ios-nopedantic.m
cfe/trunk/test/SemaObjC/format-size-spec-nsinteger.m
Modified:
cfe/trunk/include/clang/Analysis/Analyses/FormatString.h
cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
cfe/trunk/lib/Analysis/PrintfFormatString.cpp
cfe/trunk/lib/Sema/SemaChecking.cpp
cfe/trunk/test/FixIt/fixit-format-ios.m
Modified: cfe/trunk/include/clang/Analysis/Analyses/FormatString.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Analysis/Analyses/FormatString.h?rev=335393&r1=335392&r2=335393&view=diff
==
--- cfe/trunk/include/clang/Analysis/Analyses/FormatString.h (original)
+++ cfe/trunk/include/clang/Analysis/Analyses/FormatString.h Fri Jun 22
14:54:40 2018
@@ -256,18 +256,19 @@ public:
private:
const Kind K;
QualType T;
- const char *Name;
- bool Ptr;
+ const char *Name = nullptr;
+ bool Ptr = false, IsSizeT = false;
+
public:
- ArgType(Kind k = UnknownTy, const char *n = nullptr)
- : K(k), Name(n), Ptr(false) {}
- ArgType(QualType t, const char *n = nullptr)
- : K(SpecificTy), T(t), Name(n), Ptr(false) {}
- ArgType(CanQualType t) : K(SpecificTy), T(t), Name(nullptr), Ptr(false) {}
+ ArgType(Kind K = UnknownTy, const char *N = nullptr) : K(K), Name(N) {}
+ ArgType(QualType T, const char *N = nullptr) : K(SpecificTy), T(T), Name(N)
{}
+ ArgType(CanQualType T) : K(SpecificTy), T(T) {}
static ArgType Invalid() { return ArgType(InvalidTy); }
bool isValid() const { return K != InvalidTy; }
+ bool isSizeT() const { return IsSizeT; }
+
/// Create an ArgType which corresponds to the type pointer to A.
static ArgType PtrTo(const ArgType& A) {
assert(A.K >= InvalidTy && "ArgType cannot be pointer to invalid/unknown");
@@ -276,6 +277,13 @@ public:
return Res;
}
+ /// Create an ArgType which corresponds to the size_t/ssize_t type.
+ static ArgType makeSizeT(const ArgType &A) {
+ArgType Res = A;
+Res.IsSizeT = true;
+return Res;
+ }
+
MatchKind matchesType(ASTContext &C, QualType argTy) const;
QualType getRepresentativeType(ASTContext &C) const;
Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=335393&r1=335392&r2=335393&view=diff
==
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Fri Jun 22 14:54:40
2018
@@ -7719,6 +7719,10 @@ def warn_format_argument_needs_cast : Wa
"%select{values of type|enum values with underlying type}2 '%0' should not "
"be used as format arguments; add an explicit cast to %1 instead">,
InGroup;
+def warn_format_argument_needs_cast_pedantic : Warning<
+ "%select{values of type|enum values with underlying type}2 '%0' should not "
+ "be used as format arguments; add an explicit cast to %1 instead">,
+ InGroup, DefaultIgnore;
def warn_printf_positional_arg_exceeds_data_args : Warning <
"data argument position '%0' exceeds the number of data arguments (%1)">,
InGroup;
Modified: cfe/trunk/lib/Analysis/PrintfFormatString.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/PrintfFormatString.cpp?rev=335393&r1=335392&r2=335393&view=diff
==
--- cfe/trunk/lib/Analysis/PrintfFormatString.cpp (original)
+++ cfe/trunk/
r346915 - CGDecl::emitStoresForConstant fix synthesized constant's name
Author: jfb
Date: Wed Nov 14 16:19:18 2018
New Revision: 346915
URL: http://llvm.org/viewvc/llvm-project?rev=346915&view=rev
Log:
CGDecl::emitStoresForConstant fix synthesized constant's name
Summary: The name of the synthesized constants for constant initialization was
using mangling for statics, which isn't generally correct and (in a
yet-uncommitted patch) causes the mangler to assert out because the static ends
up trying to mangle function parameters and this makes no sense. Instead,
mangle to `"__const." + FunctionName + "." + DeclName`.
Reviewers: rjmccall
Subscribers: dexonsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D54055
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/test/CodeGen/decl.c
cfe/trunk/test/CodeGen/dump-struct-builtin.c
cfe/trunk/test/CodeGenCXX/amdgcn-string-literal.cpp
cfe/trunk/test/CodeGenCXX/const-init-cxx11.cpp
cfe/trunk/test/CodeGenCXX/cxx2a-init-statement.cpp
cfe/trunk/test/CodeGenCXX/float128-declarations.cpp
cfe/trunk/test/CodeGenCXX/float16-declarations.cpp
cfe/trunk/test/CodeGenOpenCL/amdgpu-nullptr.cl
cfe/trunk/test/CodeGenOpenCL/constant-addr-space-globals.cl
cfe/trunk/test/CodeGenOpenCL/partial_initializer.cl
cfe/trunk/test/CodeGenOpenCL/private-array-initialization.cl
cfe/trunk/test/Modules/templates.mm
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=346915&r1=346914&r2=346915&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Wed Nov 14 16:19:18 2018
@@ -963,6 +963,49 @@ static llvm::Value *shouldUseMemSetToIni
return llvm::isBytewiseValue(Init);
}
+static Address createUnnamedGlobalFrom(CodeGenModule &CGM, const VarDecl &D,
+ CGBuilderTy &Builder,
+ llvm::Constant *Constant,
+ CharUnits Align) {
+ auto FunctionName = [&](const DeclContext *DC) -> std::string {
+if (const auto *FD = dyn_cast(DC)) {
+ if (const auto *CC = dyn_cast(FD))
+return CC->getNameAsString();
+ if (const auto *CD = dyn_cast(FD))
+return CD->getNameAsString();
+ return CGM.getMangledName(FD);
+} else if (const auto *OM = dyn_cast(DC)) {
+ return OM->getNameAsString();
+} else if (const auto *OM = dyn_cast(DC)) {
+ return "";
+} else if (const auto *OM = dyn_cast(DC)) {
+ return "";
+} else {
+ llvm::llvm_unreachable_internal("expected a function or method");
+}
+ };
+
+ auto *Ty = Constant->getType();
+ bool isConstant = true;
+ llvm::GlobalVariable *InsertBefore = nullptr;
+ unsigned AS = CGM.getContext().getTargetAddressSpace(
+ CGM.getStringLiteralAddressSpace());
+ llvm::GlobalVariable *GV = new llvm::GlobalVariable(
+ CGM.getModule(), Ty, isConstant, llvm::GlobalValue::PrivateLinkage,
+ Constant,
+ "__const." + FunctionName(D.getParentFunctionOrMethod()) + "." +
+ D.getName(),
+ InsertBefore, llvm::GlobalValue::NotThreadLocal, AS);
+ GV->setAlignment(Align.getQuantity());
+ GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
+
+ Address SrcPtr = Address(GV, Align);
+ llvm::Type *BP = llvm::PointerType::getInt8PtrTy(CGM.getLLVMContext(), AS);
+ if (SrcPtr.getType() != BP)
+SrcPtr = Builder.CreateBitCast(SrcPtr, BP);
+ return SrcPtr;
+}
+
static void emitStoresForConstant(CodeGenModule &CGM, const VarDecl &D,
Address Loc, bool isVolatile,
CGBuilderTy &Builder,
@@ -1002,25 +1045,10 @@ static void emitStoresForConstant(CodeGe
return;
}
- // Otherwise, create a temporary global with the initializer then memcpy from
- // the global to the alloca.
- std::string Name = getStaticDeclName(CGM, D);
- unsigned AS = CGM.getContext().getTargetAddressSpace(
- CGM.getStringLiteralAddressSpace());
- llvm::Type *BP = llvm::PointerType::getInt8PtrTy(CGM.getLLVMContext(), AS);
-
- llvm::GlobalVariable *GV = new llvm::GlobalVariable(
- CGM.getModule(), constant->getType(), true,
- llvm::GlobalValue::PrivateLinkage, constant, Name, nullptr,
- llvm::GlobalValue::NotThreadLocal, AS);
- GV->setAlignment(Loc.getAlignment().getQuantity());
- GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
-
- Address SrcPtr = Address(GV, Loc.getAlignment());
- if (SrcPtr.getType() != BP)
-SrcPtr = Builder.CreateBitCast(SrcPtr, BP);
-
- Builder.CreateMemCpy(Loc, SrcPtr, SizeVal, isVolatile);
+ Builder.CreateMemCpy(
+ Loc,
+ createUnnamedGlobalFrom(CGM, D, Builder, constant, Loc.getAlignment()),
+ SizeVal, isVolatile);
}
/// EmitAutoVarDecl - Emit code and set up an entry in LocalDeclMap for a
Modified: cfe/trunk/test/CodeGen/decl.c
URL:
http://llvm.org/viewv
r354831 - [NFC] Reorder some mis-ordered tests
Author: jfb
Date: Mon Feb 25 15:09:34 2019
New Revision: 354831
URL: http://llvm.org/viewvc/llvm-project?rev=354831&view=rev
Log:
[NFC] Reorder some mis-ordered tests
I somehow had misaligned some of the tests when I originally wrote this.
Re-order them properly.
Modified:
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=354831&r1=354830&r2=354831&view=diff
==
--- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Mon Feb 25 15:09:34 2019
@@ -111,22 +111,22 @@ struct derived : public base {};
struct virtualderived : public virtual base, public virtual derived {};
// PATTERN: @__const.test_matching_uninit.uninit = private unnamed_addr
constant %union.matching { i32 -1431655766 }, align 4
// PATTERN: @__const.test_matching_custom.custom = private unnamed_addr
constant { float } { float 6.145500e+04 }, align 4
+// ZERO: @__const.test_matching_custom.custom = private unnamed_addr constant
{ float } { float 6.145500e+04 }, align 4
union matching { int i; float f; };
// PATTERN: @__const.test_matchingreverse_uninit.uninit = private unnamed_addr
constant %union.matchingreverse { float 0xE000 }, align 4
// PATTERN: @__const.test_matchingreverse_custom.custom = private unnamed_addr
constant { i32 } { i32 61455 }, align 4
-// ZERO: @__const.test_matching_custom.custom = private unnamed_addr constant
{ float } { float 6.145500e+04 }, align 4
+// ZERO: @__const.test_matchingreverse_custom.custom = private unnamed_addr
constant { i32 } { i32 61455 }, align 4
union matchingreverse { float f; int i; };
// PATTERN: @__const.test_unmatched_uninit.uninit = private unnamed_addr
constant %union.unmatched { i32 -1431655766 }, align 4
// PATTERN: @__const.test_unmatched_custom.custom = private unnamed_addr
constant %union.unmatched { i32 1001242351 }, align 4
-// ZERO: @__const.test_matchingreverse_custom.custom = private unnamed_addr
constant { i32 } { i32 61455 }, align 4
+// ZERO: @__const.test_unmatched_custom.custom = private unnamed_addr constant
%union.unmatched { i32 1001242351 }, align 4
union unmatched { char c; int i; };
// PATTERN: @__const.test_unmatchedreverse_uninit.uninit = private
unnamed_addr constant %union.unmatchedreverse { i32 -1431655766 }, align 4
// PATTERN: @__const.test_unmatchedreverse_custom.custom = private
unnamed_addr constant { i8, [3 x i8] } { i8 42, [3 x i8] zeroinitializer },
align 4
-// ZERO: @__const.test_unmatched_custom.custom = private unnamed_addr constant
%union.unmatched { i32 1001242351 }, align 4
+// ZERO: @__const.test_unmatchedreverse_custom.custom = private unnamed_addr
constant { i8, [3 x i8] } { i8 42, [3 x i8] zeroinitializer }, align 4
union unmatchedreverse { int i; char c; };
// PATTERN: @__const.test_unmatchedfp_uninit.uninit = private unnamed_addr
constant %union.unmatchedfp { double 0x }, align 8
// PATTERN: @__const.test_unmatchedfp_custom.custom = private unnamed_addr
constant %union.unmatchedfp { double 0x400921FB54442D18 }, align 8
-// ZERO: @__const.test_unmatchedreverse_custom.custom = private unnamed_addr
constant { i8, [3 x i8] } { i8 42, [3 x i8] zeroinitializer }, align 4
// ZERO: @__const.test_unmatchedfp_custom.custom = private unnamed_addr
constant %union.unmatchedfp { double 0x400921FB54442D18 }, align 8
union unmatchedfp { float f; double d; };
enum emptyenum {};
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r355547 - Passthrough compiler launcher
Author: jfb Date: Wed Mar 6 12:36:00 2019 New Revision: 355547 URL: http://llvm.org/viewvc/llvm-project?rev=355547&view=rev Log: Passthrough compiler launcher Summary: Not having this seems like an oversight, and makes stage2 builds odd. Reviewers: ddunbar, dexonsmith Subscribers: mgorny, jkorous, jdoerfert, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D59032 Modified: cfe/trunk/CMakeLists.txt Modified: cfe/trunk/CMakeLists.txt URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/CMakeLists.txt?rev=355547&r1=355546&r2=355547&view=diff == --- cfe/trunk/CMakeLists.txt (original) +++ cfe/trunk/CMakeLists.txt Wed Mar 6 12:36:00 2019 @@ -666,6 +666,8 @@ if (CLANG_ENABLE_BOOTSTRAP) LLVM_VERSION_SUFFIX LLVM_BINUTILS_INCDIR CLANG_REPOSITORY_STRING +CMAKE_C_COMPILER_LAUNCHER +CMAKE_CXX_COMPILER_LAUNCHER CMAKE_MAKE_PROGRAM CMAKE_OSX_ARCHITECTURES LLVM_ENABLE_PROJECTS ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r355660 - Variable auto-init: split out small arrays
Author: jfb
Date: Thu Mar 7 17:26:49 2019
New Revision: 355660
URL: http://llvm.org/viewvc/llvm-project?rev=355660&view=rev
Log:
Variable auto-init: split out small arrays
Summary: Following up with r355181, initialize small arrays as well.
LLVM stage2 shows a tiny size gain.
Reviewers: glider, pcc, kcc, rjmccall
Subscribers: jkorous, dexonsmith, jdoerfert, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D58885
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=355660&r1=355659&r2=355660&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Thu Mar 7 17:26:49 2019
@@ -970,12 +970,12 @@ static llvm::Value *shouldUseMemSetToIni
return llvm::isBytewiseValue(Init);
}
-/// Decide whether we want to split a constant structure store into a sequence
-/// of its fields' stores. This may cost us code size and compilation speed,
-/// but plays better with store optimizations.
-static bool shouldSplitStructStore(CodeGenModule &CGM,
- uint64_t GlobalByteSize) {
- // Don't break structures that occupy more than one cacheline.
+/// Decide whether we want to split a constant structure or array store into a
+/// sequence of its fields' stores. This may cost us code size and compilation
+/// speed, but plays better with store optimizations.
+static bool shouldSplitConstantStore(CodeGenModule &CGM,
+ uint64_t GlobalByteSize) {
+ // Don't break things that occupy more than one cacheline.
uint64_t ByteSizeLimit = 64;
if (CGM.getCodeGenOpts().OptimizationLevel == 0)
return false;
@@ -1203,9 +1203,9 @@ static void emitStoresForConstant(CodeGe
CGBuilderTy &Builder,
llvm::Constant *constant) {
auto *Ty = constant->getType();
- bool isScalar = Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy() ||
- Ty->isFPOrFPVectorTy();
- if (isScalar) {
+ bool canDoSingleStore = Ty->isIntOrIntVectorTy() ||
+ Ty->isPtrOrPtrVectorTy() || Ty->isFPOrFPVectorTy();
+ if (canDoSingleStore) {
Builder.CreateStore(constant, Loc, isVolatile);
return;
}
@@ -1213,12 +1213,13 @@ static void emitStoresForConstant(CodeGe
auto *Int8Ty = llvm::IntegerType::getInt8Ty(CGM.getLLVMContext());
auto *IntPtrTy = CGM.getDataLayout().getIntPtrType(CGM.getLLVMContext());
- // If the initializer is all or mostly the same, codegen with bzero / memset
- // then do a few stores afterward.
uint64_t ConstantSize = CGM.getDataLayout().getTypeAllocSize(Ty);
if (!ConstantSize)
return;
auto *SizeVal = llvm::ConstantInt::get(IntPtrTy, ConstantSize);
+
+ // If the initializer is all or mostly the same, codegen with bzero / memset
+ // then do a few stores afterward.
if (shouldUseBZeroPlusStoresToInitialize(constant, ConstantSize)) {
Builder.CreateMemSet(Loc, llvm::ConstantInt::get(Int8Ty, 0), SizeVal,
isVolatile);
@@ -1232,6 +1233,7 @@ static void emitStoresForConstant(CodeGe
return;
}
+ // If the initializer is a repeated byte pattern, use memset.
llvm::Value *Pattern = shouldUseMemSetToInitialize(constant, ConstantSize);
if (Pattern) {
uint64_t Value = 0x00;
@@ -1245,20 +1247,34 @@ static void emitStoresForConstant(CodeGe
return;
}
- llvm::StructType *STy = dyn_cast(Ty);
- // FIXME: handle the case when STy != Loc.getElementType().
- // FIXME: handle non-struct aggregate types.
- if (STy && (STy == Loc.getElementType()) &&
- shouldSplitStructStore(CGM, ConstantSize)) {
-for (unsigned i = 0; i != constant->getNumOperands(); i++) {
- Address EltPtr = Builder.CreateStructGEP(Loc, i);
- emitStoresForConstant(
- CGM, D, EltPtr, isVolatile, Builder,
- cast(Builder.CreateExtractValue(constant, i)));
+ // If the initializer is small, use a handful of stores.
+ if (shouldSplitConstantStore(CGM, ConstantSize)) {
+if (auto *STy = dyn_cast(Ty)) {
+ // FIXME: handle the case when STy != Loc.getElementType().
+ if (STy == Loc.getElementType()) {
+for (unsigned i = 0; i != constant->getNumOperands(); i++) {
+ Address EltPtr = Builder.CreateStructGEP(Loc, i);
+ emitStoresForConstant(
+ CGM, D, EltPtr, isVolatile, Builder,
+ cast(Builder.CreateExtractValue(constant, i)));
+}
+return;
+ }
+} else if (auto *ATy = dyn_cast(Ty)) {
+ // FIXME: handle the case when ATy != Loc.getElementType().
+ if (ATy == Loc.getElementType()) {
+for (unsigned i = 0; i != ATy->getNumElements(); i++) {
+ Address EltPtr = Builder.CreateCo
r356940 - Thread Safety: also look at ObjC methods
Author: jfb
Date: Mon Mar 25 13:06:32 2019
New Revision: 356940
URL: http://llvm.org/viewvc/llvm-project?rev=356940&view=rev
Log:
Thread Safety: also look at ObjC methods
Summary:
SExprBuilder::translateDeclRefExpr was only looking at FunctionDecl and not
also looking at ObjCMethodDecl. It should consider both because the attributes
can be used on Objective-C as well.
Reviewers: dexonsmith, erik.pilkington
Subscribers: jkorous, jdoerfert, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59523
Added:
cfe/trunk/test/SemaObjCXX/no-crash-thread-safety-analysis.mm
cfe/trunk/test/SemaObjCXX/thread-safety-analysis.h
Modified:
cfe/trunk/lib/Analysis/ThreadSafetyCommon.cpp
cfe/trunk/test/SemaObjCXX/warn-thread-safety-analysis.mm
Modified: cfe/trunk/lib/Analysis/ThreadSafetyCommon.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/ThreadSafetyCommon.cpp?rev=356940&r1=356939&r2=356940&view=diff
==
--- cfe/trunk/lib/Analysis/ThreadSafetyCommon.cpp (original)
+++ cfe/trunk/lib/Analysis/ThreadSafetyCommon.cpp Mon Mar 25 13:06:32 2019
@@ -276,18 +276,23 @@ til::SExpr *SExprBuilder::translateDeclR
// Function parameters require substitution and/or renaming.
if (const auto *PV = dyn_cast_or_null(VD)) {
-const auto *FD =
-cast(PV->getDeclContext())->getCanonicalDecl();
unsigned I = PV->getFunctionScopeIndex();
-
-if (Ctx && Ctx->FunArgs && FD == Ctx->AttrDecl->getCanonicalDecl()) {
- // Substitute call arguments for references to function parameters
- assert(I < Ctx->NumArgs);
- return translate(Ctx->FunArgs[I], Ctx->Prev);
+const DeclContext *D = PV->getDeclContext();
+if (Ctx && Ctx->FunArgs) {
+ const Decl *Canonical = Ctx->AttrDecl->getCanonicalDecl();
+ if (isa(D)
+ ? (cast(D)->getCanonicalDecl() == Canonical)
+ : (cast(D)->getCanonicalDecl() == Canonical)) {
+// Substitute call arguments for references to function parameters
+assert(I < Ctx->NumArgs);
+return translate(Ctx->FunArgs[I], Ctx->Prev);
+ }
}
// Map the param back to the param of the original function declaration
// for consistent comparisons.
-VD = FD->getParamDecl(I);
+VD = isa(D)
+ ? cast(D)->getCanonicalDecl()->getParamDecl(I)
+ : cast(D)->getCanonicalDecl()->getParamDecl(I);
}
// For non-local variables, treat it as a reference to a named object.
Added: cfe/trunk/test/SemaObjCXX/no-crash-thread-safety-analysis.mm
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjCXX/no-crash-thread-safety-analysis.mm?rev=356940&view=auto
==
--- cfe/trunk/test/SemaObjCXX/no-crash-thread-safety-analysis.mm (added)
+++ cfe/trunk/test/SemaObjCXX/no-crash-thread-safety-analysis.mm Mon Mar 25
13:06:32 2019
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -fsyntax-only -Wthread-safety -Wno-objc-root-class %s
+
+// Thread safety analysis used to crash when used with ObjC methods.
+
+#include "thread-safety-analysis.h"
+
+@interface MyInterface
+- (void)doIt:(class Lock *)myLock;
+@end
+
+@implementation MyInterface
+- (void)doIt:(class Lock *)myLock {
+ AutoLock lock(*myLock);
+}
+@end
Added: cfe/trunk/test/SemaObjCXX/thread-safety-analysis.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjCXX/thread-safety-analysis.h?rev=356940&view=auto
==
--- cfe/trunk/test/SemaObjCXX/thread-safety-analysis.h (added)
+++ cfe/trunk/test/SemaObjCXX/thread-safety-analysis.h Mon Mar 25 13:06:32 2019
@@ -0,0 +1,17 @@
+class __attribute__((lockable)) Lock {
+public:
+ void Acquire() __attribute__((exclusive_lock_function())) {}
+ void Release() __attribute__((unlock_function())) {}
+};
+
+class __attribute__((scoped_lockable)) AutoLock {
+public:
+ AutoLock(Lock &lock) __attribute__((exclusive_lock_function(lock)))
+ : lock_(lock) {
+lock.Acquire();
+ }
+ ~AutoLock() __attribute__((unlock_function())) { lock_.Release(); }
+
+private:
+ Lock &lock_;
+};
Modified: cfe/trunk/test/SemaObjCXX/warn-thread-safety-analysis.mm
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjCXX/warn-thread-safety-analysis.mm?rev=356940&r1=356939&r2=356940&view=diff
==
--- cfe/trunk/test/SemaObjCXX/warn-thread-safety-analysis.mm (original)
+++ cfe/trunk/test/SemaObjCXX/warn-thread-safety-analysis.mm Mon Mar 25
13:06:32 2019
@@ -1,22 +1,6 @@
// RUN: %clang_cc1 -fsyntax-only -verify -Wthread-safety -Wthread-safety-beta
-Wno-objc-root-class %s
-class __attribute__((lockable)) Lock {
-public:
- void Acquire() __attribute__((exclusive_lock_function())) {}
- void Release() __attribute__((unlock_function())) {}
-};
-
-class __attribute__
r358243 - Variable auto-init: also auto-init alloca
Author: jfb
Date: Thu Apr 11 17:11:27 2019
New Revision: 358243
URL: http://llvm.org/viewvc/llvm-project?rev=358243&view=rev
Log:
Variable auto-init: also auto-init alloca
Summary:
alloca isn’t auto-init’d right now because it’s a different path in clang that
all the other stuff we support (it’s a builtin, not an expression).
Interestingly, alloca doesn’t have a type (as opposed to even VLA) so we can
really only initialize it with memset.
Subscribers: jkorous, dexonsmith, cfe-commits, rjmccall, glider, kees, kcc, pcc
Tags: #clang
Differential Revision: https://reviews.llvm.org/D60548
Added:
cfe/trunk/lib/CodeGen/PatternInit.cpp
cfe/trunk/lib/CodeGen/PatternInit.h
Modified:
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/lib/CodeGen/CMakeLists.txt
cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=358243&r1=358242&r2=358243&view=diff
==
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Thu Apr 11 17:11:27 2019
@@ -17,6 +17,7 @@
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "ConstantEmitter.h"
+#include "PatternInit.h"
#include "TargetInfo.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
@@ -44,6 +45,25 @@ int64_t clamp(int64_t Value, int64_t Low
return std::min(High, std::max(Low, Value));
}
+static void initializeAlloca(CodeGenFunction &CGF, AllocaInst *AI, Value
*Size, unsigned AlignmentInBytes) {
+ ConstantInt *Byte;
+ switch (CGF.getLangOpts().getTrivialAutoVarInit()) {
+ case LangOptions::TrivialAutoVarInitKind::Uninitialized:
+// Nothing to initialize.
+return;
+ case LangOptions::TrivialAutoVarInitKind::Zero:
+Byte = CGF.Builder.getInt8(0x00);
+break;
+ case LangOptions::TrivialAutoVarInitKind::Pattern: {
+llvm::Type *Int8 = llvm::IntegerType::getInt8Ty(CGF.CGM.getLLVMContext());
+Byte = llvm::dyn_cast(
+initializationPatternFor(CGF.CGM, Int8));
+break;
+ }
+ }
+ CGF.Builder.CreateMemSet(AI, Byte, Size, AlignmentInBytes);
+}
+
/// getBuiltinLibFunction - Given a builtin id for a function like
/// "__builtin_fabsf", return a Function* for "fabsf".
llvm::Constant *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD,
@@ -2259,6 +2279,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(
.getQuantity();
AllocaInst *AI = Builder.CreateAlloca(Builder.getInt8Ty(), Size);
AI->setAlignment(SuitableAlignmentInBytes);
+initializeAlloca(*this, AI, Size, SuitableAlignmentInBytes);
return RValue::get(AI);
}
@@ -2271,6 +2292,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(
CGM.getContext().toCharUnitsFromBits(AlignmentInBits).getQuantity();
AllocaInst *AI = Builder.CreateAlloca(Builder.getInt8Ty(), Size);
AI->setAlignment(AlignmentInBytes);
+initializeAlloca(*this, AI, Size, AlignmentInBytes);
return RValue::get(AI);
}
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=358243&r1=358242&r2=358243&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Thu Apr 11 17:11:27 2019
@@ -19,6 +19,7 @@
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "ConstantEmitter.h"
+#include "PatternInit.h"
#include "TargetInfo.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/CharUnits.h"
@@ -984,92 +985,13 @@ static bool shouldSplitConstantStore(Cod
return false;
}
-static llvm::Constant *patternFor(CodeGenModule &CGM, llvm::Type *Ty) {
- // The following value is a guaranteed unmappable pointer value and has a
- // repeated byte-pattern which makes it easier to synthesize. We use it for
- // pointers as well as integers so that aggregates are likely to be
- // initialized with this repeated value.
- constexpr uint64_t LargeValue = 0xull;
- // For 32-bit platforms it's a bit trickier because, across systems, only the
- // zero page can reasonably be expected to be unmapped, and even then we need
- // a very low address. We use a smaller value, and that value sadly doesn't
- // have a repeated byte-pattern. We don't use it for integers.
- constexpr uint32_t SmallValue = 0x00AA;
- // Floating-point values are initialized as NaNs because they propagate.
Using
- // a repeated byte pattern means that it will be easier to initialize
- // all-floating-point aggregates and arrays with memset. Further, aggregates
- // which mix integral and a few floats might also initialize with memset
- // followed by a handful of stores for the floats. Using fairly unique NaNs
- // also means they'll be easier to distinguish in a crash.
r359523 - [NFC] typo
Author: jfb
Date: Mon Apr 29 17:11:53 2019
New Revision: 359523
URL: http://llvm.org/viewvc/llvm-project?rev=359523&view=rev
Log:
[NFC] typo
Modified:
cfe/trunk/include/clang/AST/ASTContext.h
cfe/trunk/lib/AST/ASTContext.cpp
Modified: cfe/trunk/include/clang/AST/ASTContext.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/ASTContext.h?rev=359523&r1=359522&r2=359523&view=diff
==
--- cfe/trunk/include/clang/AST/ASTContext.h (original)
+++ cfe/trunk/include/clang/AST/ASTContext.h Mon Apr 29 17:11:53 2019
@@ -2701,7 +2701,7 @@ public:
/// otherwise returns null.
const ObjCInterfaceDecl *getObjContainingInterface(const NamedDecl *ND)
const;
- /// Set the copy inialization expression of a block var decl. \p CanThrow
+ /// Set the copy initialization expression of a block var decl. \p CanThrow
/// indicates whether the copy expression can throw or not.
void setBlockVarCopyInit(const VarDecl* VD, Expr *CopyExpr, bool CanThrow);
Modified: cfe/trunk/lib/AST/ASTContext.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ASTContext.cpp?rev=359523&r1=359522&r2=359523&view=diff
==
--- cfe/trunk/lib/AST/ASTContext.cpp (original)
+++ cfe/trunk/lib/AST/ASTContext.cpp Mon Apr 29 17:11:53 2019
@@ -2580,7 +2580,7 @@ ASTContext::getBlockVarCopyInit(const Va
return {nullptr, false};
}
-/// Set the copy inialization expression of a block var decl.
+/// Set the copy initialization expression of a block var decl.
void ASTContext::setBlockVarCopyInit(const VarDecl*VD, Expr *CopyExpr,
bool CanThrow) {
assert(VD && CopyExpr && "Passed null params");
___
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r359524 - [NFC] typo
Author: jfb
Date: Mon Apr 29 17:19:43 2019
New Revision: 359524
URL: http://llvm.org/viewvc/llvm-project?rev=359524&view=rev
Log:
[NFC] typo
Modified:
cfe/trunk/lib/Sema/Sema.cpp
Modified: cfe/trunk/lib/Sema/Sema.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/Sema.cpp?rev=359524&r1=359523&r2=359524&view=diff
==
--- cfe/trunk/lib/Sema/Sema.cpp (original)
+++ cfe/trunk/lib/Sema/Sema.cpp Mon Apr 29 17:19:43 2019
@@ -1629,7 +1629,7 @@ void Sema::RecordParsingTemplateParamete
}
// Check that the type of the VarDecl has an accessible copy constructor and
-// resolve its destructor's exception spefication.
+// resolve its destructor's exception specification.
static void checkEscapingByref(VarDecl *VD, Sema &S) {
QualType T = VD->getType();
EnterExpressionEvaluationContext scope(
@@ -1646,7 +1646,7 @@ static void checkEscapingByref(VarDecl *
S.Context.setBlockVarCopyInit(VD, Init, S.canThrow(Init));
}
- // The destructor's exception spefication is needed when IRGen generates
+ // The destructor's exception specification is needed when IRGen generates
// block copy/destroy functions. Resolve it here.
if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
if (CXXDestructorDecl *DD = RD->getDestructor()) {
___
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r359628 - Variable auto-init: don't initialize aggregate padding of all aggregates
Author: jfb
Date: Tue Apr 30 15:56:53 2019
New Revision: 359628
URL: http://llvm.org/viewvc/llvm-project?rev=359628&view=rev
Log:
Variable auto-init: don't initialize aggregate padding of all aggregates
Summary:
C guarantees that brace-init with fewer initializers than members in the
aggregate will initialize the rest of the aggregate as-if it were static
initialization. In turn static initialization guarantees that padding is
initialized to zero bits.
Quoth the Standard:
C17 6.7.9 Initialization ❡21
If there are fewer initializers in a brace-enclosed list than there are elements
or members of an aggregate, or fewer characters in a string literal used to
initialize an array of known size than there are elements in the array, the
remainder of the aggregate shall be initialized implicitly the same as objects
that have static storage duration.
C17 6.7.9 Initialization ❡10
If an object that has automatic storage duration is not initialized explicitly,
its value is indeterminate. If an object that has static or thread storage
duration is not initialized explicitly, then:
* if it has pointer type, it is initialized to a null pointer;
* if it has arithmetic type, it is initialized to (positive or unsigned) zero;
* if it is an aggregate, every member is initialized (recursively) according to
these rules, and any padding is initialized to zero bits;
* if it is a union, the first named member is initialized (recursively)
according to these rules, and any padding is initialized to zero bits;
Reviewers: glider, pcc, kcc, rjmccall, erik.pilkington
Subscribers: jkorous, dexonsmith, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D61280
Added:
cfe/trunk/test/CodeGen/padding-init.c
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=359628&r1=359627&r2=359628&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Tue Apr 30 15:56:53 2019
@@ -1787,13 +1787,20 @@ void CodeGenFunction::EmitAutoVarInit(co
D.isUsableInConstantExpressions(getContext())) {
assert(!capturedByInit && "constant init contains a capturing block?");
constant = ConstantEmitter(*this).tryEmitAbstractForInitializer(D);
-if (constant && trivialAutoVarInit !=
-LangOptions::TrivialAutoVarInitKind::Uninitialized) {
+if (constant && !constant->isZeroValue() &&
+(trivialAutoVarInit !=
+ LangOptions::TrivialAutoVarInitKind::Uninitialized)) {
IsPattern isPattern =
(trivialAutoVarInit == LangOptions::TrivialAutoVarInitKind::Pattern)
? IsPattern::Yes
: IsPattern::No;
- constant = constWithPadding(CGM, isPattern,
+ // C guarantees that brace-init with fewer initializers than members in
+ // the aggregate will initialize the rest of the aggregate as-if it were
+ // static initialization. In turn static initialization guarantees that
+ // padding is initialized to zero bits. We could instead pattern-init if
D
+ // has any ImplicitValueInitExpr, but that seems to be unintuitive
+ // behavior.
+ constant = constWithPadding(CGM, IsPattern::No,
replaceUndef(CGM, isPattern, constant));
}
}
Added: cfe/trunk/test/CodeGen/padding-init.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/padding-init.c?rev=359628&view=auto
==
--- cfe/trunk/test/CodeGen/padding-init.c (added)
+++ cfe/trunk/test/CodeGen/padding-init.c Tue Apr 30 15:56:53 2019
@@ -0,0 +1,51 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown
-ftrivial-auto-var-init=pattern %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -ftrivial-auto-var-init=zero
%s -emit-llvm -o - | FileCheck %s
+
+// C guarantees that brace-init with fewer initializers than members in the
+// aggregate will initialize the rest of the aggregate as-if it were static
+// initialization. In turn static initialization guarantees that padding is
+// initialized to zero bits.
+
+// CHECK: @__const.partial_init.s = private unnamed_addr constant { i8, [7 x
i8], i64 } { i8 42, [7 x i8] zeroinitializer, i64 0 }, align 8
+
+// Technically, we could initialize this padding to non-zero because all of the
+// struct's members have initializers.
+
+// CHECK: @__const.init_all.s = private unnamed_addr constant { i8, [7 x i8],
i64 } { i8 42, [7 x i8] zeroinitializer, i64 -2401053089374216531 }, align 8
+
+struct S {
+ char c;
+ long long l;
+};
+
+void use(struct S*);
+
+// CHECK-LABEL: @empty_braces(
+// CHECK: %s = alloca
+// CHECK-NEXT: %[[B:[0-9+]]] = bitcast %struct.S* %s to i8*
+// CHECK-NEXT: call void @llvm.memset{{.*}}(i8* align 8
r359636 - Fix auto-init test
Author: jfb
Date: Tue Apr 30 16:27:28 2019
New Revision: 359636
URL: http://llvm.org/viewvc/llvm-project?rev=359636&view=rev
Log:
Fix auto-init test
r359628 changed the initialization of padding to follow C, but I didn't update
the C++ tests.
Modified:
cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
Modified: cfe/trunk/test/CodeGenCXX/auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/auto-var-init.cpp?rev=359636&r1=359635&r2=359636&view=diff
==
--- cfe/trunk/test/CodeGenCXX/auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/auto-var-init.cpp Tue Apr 30 16:27:28 2019
@@ -64,7 +64,7 @@ struct smallpartinit { char c = 42, d; }
// PATTERN-O1-NOT: @__const.test_nullinit_custom.custom
struct nullinit { char* null = nullptr; };
// PATTERN-O0: @__const.test_padded_uninit.uninit = private unnamed_addr
constant { i8, [3 x i8], i32 } { i8 -86, [3 x i8] c"\AA\AA\AA", i32 -1431655766
}, align 4
-// PATTERN-O0: @__const.test_padded_custom.custom = private unnamed_addr
constant { i8, [3 x i8], i32 } { i8 42, [3 x i8] c"\AA\AA\AA", i32 13371337 },
align 4
+// PATTERN-O0: @__const.test_padded_custom.custom = private unnamed_addr
constant { i8, [3 x i8], i32 } { i8 42, [3 x i8] zeroinitializer, i32 13371337
}, align 4
// ZERO-O0: @__const.test_padded_custom.custom = private unnamed_addr constant
{ i8, [3 x i8], i32 } { i8 42, [3 x i8] zeroinitializer, i32 13371337 }, align 4
// PATTERN-O1-NOT: @__const.test_padded_uninit.uninit
// PATTERN-O1-NOT: @__const.test_padded_custom.custom
@@ -88,7 +88,7 @@ struct paddedpackedarray { struct padded
// PATTERN-O0: @__const.test_unpackedinpacked_uninit.uninit = private
unnamed_addr constant <{ { i8, [3 x i8], i32 }, i8 }> <{ { i8, [3 x i8], i32 }
{ i8 -86, [3 x i8] c"\AA\AA\AA", i32 -1431655766 }, i8 -86 }>, align 1
struct unpackedinpacked { padded a; char b; } __attribute__((packed));
// PATTERN-O0: @__const.test_paddednested_uninit.uninit = private unnamed_addr
constant { { i8, [3 x i8], i32 }, { i8, [3 x i8], i32 } } { { i8, [3 x i8], i32
} { i8 -86, [3 x i8] c"\AA\AA\AA", i32 -1431655766 }, { i8, [3 x i8], i32 } {
i8 -86, [3 x i8] c"\AA\AA\AA", i32 -1431655766 } }, align 4
-// PATTERN: @__const.test_paddednested_custom.custom = private unnamed_addr
constant { { i8, [3 x i8], i32 }, { i8, [3 x i8], i32 } } { { i8, [3 x i8], i32
} { i8 42, [3 x i8] c"\AA\AA\AA", i32 13371337 }, { i8, [3 x i8], i32 } { i8
43, [3 x i8] c"\AA\AA\AA", i32 13371338 } }, align 4
+// PATTERN: @__const.test_paddednested_custom.custom = private unnamed_addr
constant { { i8, [3 x i8], i32 }, { i8, [3 x i8], i32 } } { { i8, [3 x i8], i32
} { i8 42, [3 x i8] zeroinitializer, i32 13371337 }, { i8, [3 x i8], i32 } { i8
43, [3 x i8] zeroinitializer, i32 13371338 } }, align 4
// ZERO: @__const.test_paddednested_custom.custom = private unnamed_addr
constant { { i8, [3 x i8], i32 }, { i8, [3 x i8], i32 } } { { i8, [3 x i8], i32
} { i8 42, [3 x i8] zeroinitializer, i32 13371337 }, { i8, [3 x i8], i32 } { i8
43, [3 x i8] zeroinitializer, i32 13371338 } }, align 4
struct paddednested { struct padded p1, p2; };
// PATTERN-O0: @__const.test_paddedpackednested_uninit.uninit = private
unnamed_addr constant %struct.paddedpackednested { %struct.paddedpacked <{ i8
-86, i32 -1431655766 }>, %struct.paddedpacked <{ i8 -86, i32 -1431655766 }> },
align 1
@@ -135,7 +135,7 @@ struct arraytail { int i; int arr[]; };
// ZERO: @__const.test_intptr4_custom.custom = private unnamed_addr constant
[4 x i32*] [i32* inttoptr (i64 572662306 to i32*), i32* inttoptr (i64 572662306
to i32*), i32* inttoptr (i64 572662306 to i32*), i32* inttoptr (i64 572662306
to i32*)], align 16
// PATTERN-O0: @__const.test_tailpad4_uninit.uninit = private unnamed_addr
constant [4 x { i16, i8, [1 x i8] }] [{ i16, i8, [1 x i8] } { i16 -21846, i8
-86, [1 x i8] c"\AA" }, { i16, i8, [1 x i8] } { i16 -21846, i8 -86, [1 x i8]
c"\AA" }, { i16, i8, [1 x i8] } { i16 -21846, i8 -86, [1 x i8] c"\AA" }, { i16,
i8, [1 x i8] } { i16 -21846, i8 -86, [1 x i8] c"\AA" }], align 16
// PATTERN-O1-NOT: @__const.test_tailpad4_uninit.uninit
-// PATTERN: @__const.test_tailpad4_custom.custom = private unnamed_addr
constant [4 x { i16, i8, [1 x i8] }] [{ i16, i8, [1 x i8] } { i16 257, i8 1, [1
x i8] c"\AA" }, { i16, i8, [1 x i8] } { i16 257, i8 1, [1 x i8] c"\AA" }, {
i16, i8, [1 x i8] } { i16 257, i8 1, [1 x i8] c"\AA" }, { i16, i8, [1 x i8] } {
i16 257, i8 1, [1 x i8] c"\AA" }], align 16
+// PATTERN: @__const.test_tailpad4_custom.custom = private unnamed_addr
constant [4 x { i16, i8, [1 x i8] }] [{ i16, i8, [1 x i8] } { i16 257, i8 1, [1
x i8] zeroinitializer }, { i16, i8, [1 x i8] } { i16 257, i8 1, [1 x i8]
zeroinitializer }, { i16, i8, [1 x i8] } { i16 257, i8 1, [1 x i8]
zeroinitializer }, { i16, i8, [1 x i8] } { i16 257, i8 1, [1 x i8]
zeroinitializer }], align 16
// ZERO: @__const.test_tailpad4_custom.cus
r342734 - NFC: deduplicate isRepeatedBytePattern from clang to LLVM's isBytewiseValue
Author: jfb
Date: Fri Sep 21 06:54:09 2018
New Revision: 342734
URL: http://llvm.org/viewvc/llvm-project?rev=342734&view=rev
Log:
NFC: deduplicate isRepeatedBytePattern from clang to LLVM's isBytewiseValue
Summary:
This code was in CGDecl.cpp and really belongs in LLVM. It happened to have
isBytewiseValue which served a very similar purpose but wasn't as powerful as
clang's version. Remove the clang version, and augment isBytewiseValue to be as
powerful so that clang does the same thing it used to.
LLVM part of this patch: D51751
Subscribers: dexonsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D51752
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=342734&r1=342733&r2=342734&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Fri Sep 21 06:54:09 2018
@@ -30,6 +30,7 @@
#include "clang/Basic/TargetInfo.h"
#include "clang/CodeGen/CGFunctionInfo.h"
#include "clang/Frontend/CodeGenOptions.h"
+#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Intrinsics.h"
@@ -948,111 +949,17 @@ static bool shouldUseBZeroPlusStoresToIn
canEmitInitWithFewStoresAfterBZero(Init, StoreBudget);
}
-/// A byte pattern.
-///
-/// Can be "any" pattern if the value was padding or known to be undef.
-/// Can be "none" pattern if a sequence doesn't exist.
-class BytePattern {
- uint8_t Val;
- enum class ValueType : uint8_t { Specific, Any, None } Type;
- BytePattern(ValueType Type) : Type(Type) {}
-
-public:
- BytePattern(uint8_t Value) : Val(Value), Type(ValueType::Specific) {}
- static BytePattern Any() { return BytePattern(ValueType::Any); }
- static BytePattern None() { return BytePattern(ValueType::None); }
- bool isAny() const { return Type == ValueType::Any; }
- bool isNone() const { return Type == ValueType::None; }
- bool isValued() const { return Type == ValueType::Specific; }
- uint8_t getValue() const {
-assert(isValued());
-return Val;
- }
- BytePattern merge(const BytePattern Other) const {
-if (isNone() || Other.isNone())
- return None();
-if (isAny())
- return Other;
-if (Other.isAny())
- return *this;
-if (getValue() == Other.getValue())
- return *this;
-return None();
- }
-};
-
-/// Figures out whether the constant can be initialized with memset.
-static BytePattern constantIsRepeatedBytePattern(llvm::Constant *C) {
- if (isa(C) || isa(C))
-return BytePattern(0x00);
- if (isa(C))
-return BytePattern::Any();
-
- if (isa(C)) {
-auto *Int = cast(C);
-if (Int->getBitWidth() % 8 != 0)
- return BytePattern::None();
-const llvm::APInt &Value = Int->getValue();
-if (Value.isSplat(8))
- return BytePattern(Value.getLoBits(8).getLimitedValue());
-return BytePattern::None();
- }
-
- if (isa(C)) {
-auto *FP = cast(C);
-llvm::APInt Bits = FP->getValueAPF().bitcastToAPInt();
-if (Bits.getBitWidth() % 8 != 0)
- return BytePattern::None();
-if (!Bits.isSplat(8))
- return BytePattern::None();
-return BytePattern(Bits.getLimitedValue() & 0xFF);
- }
-
- if (isa(C)) {
-llvm::Constant *Splat = cast(C)->getSplatValue();
-if (Splat)
- return constantIsRepeatedBytePattern(Splat);
-return BytePattern::None();
- }
-
- if (isa(C) || isa(C)) {
-BytePattern Pattern(BytePattern::Any());
-for (unsigned I = 0, E = C->getNumOperands(); I != E; ++I) {
- llvm::Constant *Elt = cast(C->getOperand(I));
- Pattern = Pattern.merge(constantIsRepeatedBytePattern(Elt));
- if (Pattern.isNone())
-return Pattern;
-}
-return Pattern;
- }
-
- if (llvm::ConstantDataSequential *CDS =
- dyn_cast(C)) {
-BytePattern Pattern(BytePattern::Any());
-for (unsigned I = 0, E = CDS->getNumElements(); I != E; ++I) {
- llvm::Constant *Elt = CDS->getElementAsConstant(I);
- Pattern = Pattern.merge(constantIsRepeatedBytePattern(Elt));
- if (Pattern.isNone())
-return Pattern;
-}
-return Pattern;
- }
-
- // BlockAddress, ConstantExpr, and everything else is scary.
- return BytePattern::None();
-}
-
/// Decide whether we should use memset to initialize a local variable instead
/// of using a memcpy from a constant global. Assumes we've already decided to
/// not user bzero.
/// FIXME We could be more clever, as we are for bzero above, and generate
/// memset followed by stores. It's unclear that's worth the effort.
-static BytePattern shouldUseMemSetToInitialize(llvm::Constant *Init,
- uint64_t GlobalSize) {
+static llvm::Value *shouldUseMemSetToInitialize(llvm::Constant *Init,
+uint64_
r342750 - [NFC] remove unused variable
Author: jfb Date: Fri Sep 21 10:38:41 2018 New Revision: 342750 URL: http://llvm.org/viewvc/llvm-project?rev=342750&view=rev Log: [NFC] remove unused variable It was causing a warning. Modified: cfe/trunk/lib/CodeGen/CGOpenMPRuntime.cpp Modified: cfe/trunk/lib/CodeGen/CGOpenMPRuntime.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGOpenMPRuntime.cpp?rev=342750&r1=342749&r2=342750&view=diff == --- cfe/trunk/lib/CodeGen/CGOpenMPRuntime.cpp (original) +++ cfe/trunk/lib/CodeGen/CGOpenMPRuntime.cpp Fri Sep 21 10:38:41 2018 @@ -7571,7 +7571,6 @@ public: const MapData &BaseData = CI == CE ? L : L1; OMPClauseMappableExprCommon::MappableExprComponentListRef SubData = SI == SE ? Components : Components1; - auto It = CI == CE ? SI : CI; auto &OverlappedElements = OverlappedData.FindAndConstruct(&BaseData); OverlappedElements.getSecond().push_back(SubData); } ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r353490 - [NFC] Variable auto-init: use getAsVariableArrayType helper
Author: jfb Date: Thu Feb 7 16:51:05 2019 New Revision: 353490 URL: http://llvm.org/viewvc/llvm-project?rev=353490&view=rev Log: [NFC] Variable auto-init: use getAsVariableArrayType helper As suggested by @rjmccall in D57797. Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=353490&r1=353489&r2=353490&view=diff == --- cfe/trunk/lib/CodeGen/CGDecl.cpp (original) +++ cfe/trunk/lib/CodeGen/CGDecl.cpp Thu Feb 7 16:51:05 2019 @@ -1658,8 +1658,7 @@ void CodeGenFunction::EmitAutoVarInit(co // Technically zero-sized or negative-sized VLAs are undefined, and UBSan // will catch that code, but there exists code which generates zero-sized // VLAs. Be nice and initialize whatever they requested. -const VariableArrayType *VlaType = -dyn_cast_or_null(getContext().getAsArrayType(type)); +const auto *VlaType = getContext().getAsVariableArrayType(type); if (!VlaType) return; auto VlaSize = getVLASize(VlaType); ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r353495 - Variable auto-init: fix __block initialization
Author: jfb
Date: Thu Feb 7 17:29:17 2019
New Revision: 353495
URL: http://llvm.org/viewvc/llvm-project?rev=353495&view=rev
Log:
Variable auto-init: fix __block initialization
Summary:
Automatic initialization [1] of __block variables was trampling over the block's
headers after they'd been initialized, which caused self-init usage to crash,
such as here:
typedef struct XYZ { void (^block)(); } *xyz_t;
__attribute__((noinline))
xyz_t create(void (^block)()) {
xyz_t myself = malloc(sizeof(struct XYZ));
myself->block = block;
return myself;
}
int main() {
__block xyz_t captured = create(^(){ (void)captured; });
}
This type of code shouldn't be broken by variable auto-init, even if it's
sketchy.
[1] With -ftrivial-auto-var-init=pattern
Reviewers: rjmccall, pcc, kcc
Subscribers: jkorous, dexonsmith, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D57797
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=353495&r1=353494&r2=353495&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Thu Feb 7 17:29:17 2019
@@ -1633,11 +1633,15 @@ void CodeGenFunction::EmitAutoVarInit(co
? LangOptions::TrivialAutoVarInitKind::Uninitialized
: getContext().getLangOpts().getTrivialAutoVarInit()));
- auto initializeWhatIsTechnicallyUninitialized = [&]() {
+ auto initializeWhatIsTechnicallyUninitialized = [&](Address Loc) {
if (trivialAutoVarInit ==
LangOptions::TrivialAutoVarInitKind::Uninitialized)
return;
+// Only initialize a __block's storage: we always initialize the header.
+if (emission.IsEscapingByRef)
+ Loc = emitBlockByrefAddress(Loc, &D, /*follow=*/false);
+
CharUnits Size = getContext().getTypeSizeInChars(type);
if (!Size.isZero()) {
switch (trivialAutoVarInit) {
@@ -1714,7 +1718,7 @@ void CodeGenFunction::EmitAutoVarInit(co
};
if (isTrivialInitializer(Init)) {
-initializeWhatIsTechnicallyUninitialized();
+initializeWhatIsTechnicallyUninitialized(Loc);
return;
}
@@ -1728,7 +1732,7 @@ void CodeGenFunction::EmitAutoVarInit(co
}
if (!constant) {
-initializeWhatIsTechnicallyUninitialized();
+initializeWhatIsTechnicallyUninitialized(Loc);
LValue lv = MakeAddrLValue(Loc, type);
lv.setNonGC(true);
return EmitExprAsInit(Init, &D, lv, capturedByInit);
Modified: cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp?rev=353495&r1=353494&r2=353495&view=diff
==
--- cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp Thu Feb 7 17:29:17 2019
@@ -30,6 +30,32 @@ void test_block() {
used(block);
}
+// Using the variable being initialized is typically UB in C, but for blocks we
+// can be nice: they imply extra book-keeping and we can do the auto-init
before
+// any of said book-keeping.
+//
+// UNINIT-LABEL: test_block_self_init(
+// ZERO-LABEL:test_block_self_init(
+// ZERO: %block = alloca <{ i8*, i32, i32, i8*,
%struct.__block_descriptor*, i8* }>, align 8
+// ZERO: %captured1 = getelementptr inbounds
%struct.__block_byref_captured, %struct.__block_byref_captured* %captured, i32
0, i32 4
+// ZERO-NEXT: store %struct.XYZ* null, %struct.XYZ** %captured1, align 8
+// ZERO: %call = call %struct.XYZ* @create(
+// PATTERN-LABEL: test_block_self_init(
+// PATTERN: %block = alloca <{ i8*, i32, i32, i8*,
%struct.__block_descriptor*, i8* }>, align 8
+// PATTERN: %captured1 = getelementptr inbounds
%struct.__block_byref_captured, %struct.__block_byref_captured* %captured, i32
0, i32 4
+// PATTERN-NEXT: store %struct.XYZ* inttoptr (i64 -6148914691236517206 to
%struct.XYZ*), %struct.XYZ** %captured1, align 8
+// PATTERN: %call = call %struct.XYZ* @create(
+void test_block_self_init() {
+ using Block = void (^)();
+ typedef struct XYZ {
+Block block;
+ } * xyz_t;
+ extern xyz_t create(Block block);
+ __block xyz_t captured = create(^() {
+(void)captured;
+ });
+}
+
// This type of code is currently not handled by zero / pattern initialization.
// The test will break when that is fixed.
// UNINIT-LABEL: test_goto_unreachable_value(
___
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r353875 - [NFC] typo
Author: jfb
Date: Tue Feb 12 12:19:16 2019
New Revision: 353875
URL: http://llvm.org/viewvc/llvm-project?rev=353875&view=rev
Log:
[NFC] typo
Modified:
cfe/trunk/include/clang/AST/Decl.h
Modified: cfe/trunk/include/clang/AST/Decl.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Decl.h?rev=353875&r1=353874&r2=353875&view=diff
==
--- cfe/trunk/include/clang/AST/Decl.h (original)
+++ cfe/trunk/include/clang/AST/Decl.h Tue Feb 12 12:19:16 2019
@@ -3851,7 +3851,7 @@ public:
static bool classofKind(Kind K) { return K == FileScopeAsm; }
};
-/// Pepresents a block literal declaration, which is like an
+/// Represents a block literal declaration, which is like an
/// unnamed FunctionDecl. For example:
/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body }
class BlockDecl : public Decl, public DeclContext {
___
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r354147 - Variable auto-init of blocks capturing self after init bugfix
Author: jfb
Date: Fri Feb 15 09:26:29 2019
New Revision: 354147
URL: http://llvm.org/viewvc/llvm-project?rev=354147&view=rev
Log:
Variable auto-init of blocks capturing self after init bugfix
Summary:
Blocks that capture themselves (and escape) after initialization currently
codegen wrong because this:
bool capturedByInit =
Init && emission.IsEscapingByRef && isCapturedBy(D, Init);
Address Loc =
capturedByInit ? emission.Addr : emission.getObjectAddress(*this);
Already adjusts Loc from thr alloca to a GEP. This code:
if (emission.IsEscapingByRef)
Loc = emitBlockByrefAddress(Loc, &D, /*follow=*/false);
Was trying to do the same adjustment, and a GEP on a GEP (returning an int)
triggers an assertion.
Reviewers: ahatanak
Subscribers: jkorous, dexonsmith, cfe-commits, rjmccall
Tags: #clang
Differential Revision: https://reviews.llvm.org/D58218
Modified:
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=354147&r1=354146&r2=354147&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Fri Feb 15 09:26:29 2019
@@ -1620,8 +1620,9 @@ void CodeGenFunction::EmitAutoVarInit(co
bool capturedByInit =
Init && emission.IsEscapingByRef && isCapturedBy(D, Init);
- Address Loc =
- capturedByInit ? emission.Addr : emission.getObjectAddress(*this);
+ bool locIsByrefHeader = !capturedByInit;
+ const Address Loc =
+ locIsByrefHeader ? emission.getObjectAddress(*this) : emission.Addr;
// Note: constexpr already initializes everything correctly.
LangOptions::TrivialAutoVarInitKind trivialAutoVarInit =
@@ -1637,7 +1638,7 @@ void CodeGenFunction::EmitAutoVarInit(co
return;
// Only initialize a __block's storage: we always initialize the header.
-if (emission.IsEscapingByRef)
+if (emission.IsEscapingByRef && !locIsByrefHeader)
Loc = emitBlockByrefAddress(Loc, &D, /*follow=*/false);
CharUnits Size = getContext().getTypeSizeInChars(type);
@@ -1744,10 +1745,9 @@ void CodeGenFunction::EmitAutoVarInit(co
}
llvm::Type *BP = CGM.Int8Ty->getPointerTo(Loc.getAddressSpace());
- if (Loc.getType() != BP)
-Loc = Builder.CreateBitCast(Loc, BP);
-
- emitStoresForConstant(CGM, D, Loc, isVolatile, Builder, constant);
+ emitStoresForConstant(
+ CGM, D, (Loc.getType() == BP) ? Loc : Builder.CreateBitCast(Loc, BP),
+ isVolatile, Builder, constant);
}
/// Emit an expression as an initializer for an object (variable, field, etc.)
Modified: cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp?rev=354147&r1=354146&r2=354147&view=diff
==
--- cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp Fri Feb 15 09:26:29 2019
@@ -45,14 +45,35 @@ void test_block() {
// PATTERN: %captured1 = getelementptr inbounds
%struct.__block_byref_captured, %struct.__block_byref_captured* %captured, i32
0, i32 4
// PATTERN-NEXT: store %struct.XYZ* inttoptr (i64 -6148914691236517206 to
%struct.XYZ*), %struct.XYZ** %captured1, align 8
// PATTERN: %call = call %struct.XYZ* @create(
+using Block = void (^)();
+typedef struct XYZ {
+ Block block;
+} * xyz_t;
void test_block_self_init() {
- using Block = void (^)();
- typedef struct XYZ {
-Block block;
- } * xyz_t;
extern xyz_t create(Block block);
__block xyz_t captured = create(^() {
-(void)captured;
+used(captured);
+ });
+}
+
+// Capturing with escape after initialization is also an edge case.
+//
+// UNINIT-LABEL: test_block_captures_self_after_init(
+// ZERO-LABEL:test_block_captures_self_after_init(
+// ZERO: %block = alloca <{ i8*, i32, i32, i8*,
%struct.__block_descriptor*, i8* }>, align 8
+// ZERO: %captured1 = getelementptr inbounds
%struct.__block_byref_captured.1, %struct.__block_byref_captured.1* %captured,
i32 0, i32 4
+// ZERO-NEXT: store %struct.XYZ* null, %struct.XYZ** %captured1, align 8
+// ZERO: %call = call %struct.XYZ* @create(
+// PATTERN-LABEL: test_block_captures_self_after_init(
+// PATTERN: %block = alloca <{ i8*, i32, i32, i8*,
%struct.__block_descriptor*, i8* }>, align 8
+// PATTERN: %captured1 = getelementptr inbounds
%struct.__block_byref_captured.1, %struct.__block_byref_captured.1* %captured,
i32 0, i32 4
+// PATTERN-NEXT: store %struct.XYZ* inttoptr (i64 -6148914691236517206 to
%struct.XYZ*), %struct.XYZ** %captured1, align 8
+// PATTERN: %call = call %struct.XYZ* @create(
+void test_block_captures_self_after_init() {
+ extern xyz_t create(Block blo
r366028 - Support __seg_fs and __seg_gs on x86
Author: jfb
Date: Sun Jul 14 11:33:51 2019
New Revision: 366028
URL: http://llvm.org/viewvc/llvm-project?rev=366028&view=rev
Log:
Support __seg_fs and __seg_gs on x86
Summary:
GCC supports named address spaces macros:
https://gcc.gnu.org/onlinedocs/gcc/Named-Address-Spaces.html
clang does as well with address spaces:
https://clang.llvm.org/docs/LanguageExtensions.html#memory-references-to-specified-segments
Add the __seg_fs and __seg_gs macros for compatibility with GCC.
Subscribers: jkorous, dexonsmith, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D64676
Added:
cfe/trunk/test/Preprocessor/x86_seg_fs_gs.c
Modified:
cfe/trunk/docs/LanguageExtensions.rst
cfe/trunk/lib/Basic/Targets/X86.cpp
Modified: cfe/trunk/docs/LanguageExtensions.rst
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/LanguageExtensions.rst?rev=366028&r1=366027&r2=366028&view=diff
==
--- cfe/trunk/docs/LanguageExtensions.rst (original)
+++ cfe/trunk/docs/LanguageExtensions.rst Sun Jul 14 11:33:51 2019
@@ -2465,6 +2465,10 @@ Which compiles to (on X86-32):
movl%gs:(%eax), %eax
ret
+You can also use the GCC compatibility macros ``__seg_fs`` and ``__seg_gs`` for
+the same purpose. The preprocessor symbols ``__SEG_FS`` and ``__SEG_GS``
+indicate their support.
+
PowerPC Language Extensions
--
Modified: cfe/trunk/lib/Basic/Targets/X86.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets/X86.cpp?rev=366028&r1=366027&r2=366028&view=diff
==
--- cfe/trunk/lib/Basic/Targets/X86.cpp (original)
+++ cfe/trunk/lib/Basic/Targets/X86.cpp Sun Jul 14 11:33:51 2019
@@ -917,6 +917,11 @@ void X86TargetInfo::getTargetDefines(con
DefineStd(Builder, "i386", Opts);
}
+ Builder.defineMacro("__SEG_GS");
+ Builder.defineMacro("__SEG_FS");
+ Builder.defineMacro("__seg_gs", "__attribute__((address_space(256)))");
+ Builder.defineMacro("__seg_fs", "__attribute__((address_space(257)))");
+
// Subtarget options.
// FIXME: We are hard-coding the tune parameters based on the CPU, but they
// truly should be based on -mtune options.
Added: cfe/trunk/test/Preprocessor/x86_seg_fs_gs.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Preprocessor/x86_seg_fs_gs.c?rev=366028&view=auto
==
--- cfe/trunk/test/Preprocessor/x86_seg_fs_gs.c (added)
+++ cfe/trunk/test/Preprocessor/x86_seg_fs_gs.c Sun Jul 14 11:33:51 2019
@@ -0,0 +1,7 @@
+// RUN: %clang -target i386-unknown-unknown -x c -E -dM -o - %s | FileCheck
-match-full-lines %s
+// RUN: %clang -target x86_64-unknown-unknown -x c -E -dM -o - %s | FileCheck
-match-full-lines %s
+
+// CHECK: #define __SEG_FS 1
+// CHECK: #define __SEG_GS 1
+// CHECK: #define __seg_fs __attribute__((address_space(257)))
+// CHECK: #define __seg_gs __attribute__((address_space(256)))
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r367032 - Allow prefetching from non-zero address spaces
Author: jfb
Date: Thu Jul 25 09:11:57 2019
New Revision: 367032
URL: http://llvm.org/viewvc/llvm-project?rev=367032&view=rev
Log:
Allow prefetching from non-zero address spaces
Summary:
This is useful for targets which have prefetch instructions for non-default
address spaces.
Subscribers: nemanjai, javed.absar, hiraditya, kbarton, jkorous, dexonsmith,
cfe-commits, llvm-commits, RKSimon, hfinkel, t.p.northover, craig.topper, anemet
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D65254
Added:
cfe/trunk/test/CodeGen/prefetch-addr-spaces.c
Modified:
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
cfe/trunk/lib/Sema/SemaExpr.cpp
cfe/trunk/test/CodeGen/arm_acle.c
cfe/trunk/test/CodeGen/builtins-arm.c
cfe/trunk/test/CodeGen/builtins-arm64.c
cfe/trunk/test/CodeGen/ppc-xmmintrin.c
cfe/trunk/test/CodeGen/pr9614.c
cfe/trunk/test/CodeGen/prefetchw-builtins.c
cfe/trunk/test/CodeGen/sse-builtins.c
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=367032&r1=367031&r2=367032&view=diff
==
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Thu Jul 25 09:11:57 2019
@@ -2133,7 +2133,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(
Locality = (E->getNumArgs() > 2) ? EmitScalarExpr(E->getArg(2)) :
llvm::ConstantInt::get(Int32Ty, 3);
Value *Data = llvm::ConstantInt::get(Int32Ty, 1);
-Function *F = CGM.getIntrinsic(Intrinsic::prefetch);
+Function *F = CGM.getIntrinsic(Intrinsic::prefetch, Address->getType());
return RValue::get(Builder.CreateCall(F, {Address, RW, Locality, Data}));
}
case Builtin::BI__builtin_readcyclecounter: {
@@ -6021,7 +6021,7 @@ Value *CodeGenFunction::EmitARMBuiltinEx
// Locality is not supported on ARM target
Value *Locality = llvm::ConstantInt::get(Int32Ty, 3);
-Function *F = CGM.getIntrinsic(Intrinsic::prefetch);
+Function *F = CGM.getIntrinsic(Intrinsic::prefetch, Address->getType());
return Builder.CreateCall(F, {Address, RW, Locality, IsData});
}
@@ -6960,7 +6960,7 @@ Value *CodeGenFunction::EmitAArch64Built
// FIXME: We need AArch64 specific LLVM intrinsic if we want to specify
// PLDL3STRM or PLDL2STRM.
-Function *F = CGM.getIntrinsic(Intrinsic::prefetch);
+Function *F = CGM.getIntrinsic(Intrinsic::prefetch, Address->getType());
return Builder.CreateCall(F, {Address, RW, Locality, IsData});
}
@@ -10037,7 +10037,7 @@ Value *CodeGenFunction::EmitX86BuiltinEx
Value *RW = ConstantInt::get(Int32Ty, (C->getZExtValue() >> 2) & 0x1);
Value *Locality = ConstantInt::get(Int32Ty, C->getZExtValue() & 0x3);
Value *Data = ConstantInt::get(Int32Ty, 1);
-Function *F = CGM.getIntrinsic(Intrinsic::prefetch);
+Function *F = CGM.getIntrinsic(Intrinsic::prefetch, Address->getType());
return Builder.CreateCall(F, {Address, RW, Locality, Data});
}
case X86::BI_mm_clflush: {
Modified: cfe/trunk/lib/Sema/SemaExpr.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExpr.cpp?rev=367032&r1=367031&r2=367032&view=diff
==
--- cfe/trunk/lib/Sema/SemaExpr.cpp (original)
+++ cfe/trunk/lib/Sema/SemaExpr.cpp Thu Jul 25 09:11:57 2019
@@ -5375,8 +5375,8 @@ static FunctionDecl *rewriteBuiltinFunct
QualType DeclType = FDecl->getType();
const FunctionProtoType *FT = dyn_cast(DeclType);
- if (!Context.BuiltinInfo.hasPtrArgsOrResult(FDecl->getBuiltinID()) ||
- !FT || FT->isVariadic() || ArgExprs.size() != FT->getNumParams())
+ if (!Context.BuiltinInfo.hasPtrArgsOrResult(FDecl->getBuiltinID()) || !FT ||
+ ArgExprs.size() < FT->getNumParams())
return nullptr;
bool NeedsNewDecl = false;
@@ -5415,6 +5415,7 @@ static FunctionDecl *rewriteBuiltinFunct
return nullptr;
FunctionProtoType::ExtProtoInfo EPI;
+ EPI.Variadic = FT->isVariadic();
QualType OverloadTy = Context.getFunctionType(FT->getReturnType(),
OverloadParams, EPI);
DeclContext *Parent = FDecl->getParent();
Modified: cfe/trunk/test/CodeGen/arm_acle.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/arm_acle.c?rev=367032&r1=367031&r2=367032&view=diff
==
--- cfe/trunk/test/CodeGen/arm_acle.c (original)
+++ cfe/trunk/test/CodeGen/arm_acle.c Thu Jul 25 09:11:57 2019
@@ -88,28 +88,28 @@ void test_swp(uint32_t x, volatile void
/* 8.6 Memory prefetch intrinsics */
/* 8.6.1 Data prefetch */
// ARM-LABEL: test_pld
-// ARM: call void @llvm.prefetch(i8* null, i32 0, i32 3, i32 1)
+// ARM: call void @llvm.prefetch.p0i8(i8* null, i32 0, i32 3, i32 1)
void test_pld() {
__pld(0);
}
// ARM-LABEL: test_pldx
-// AArch32: call void @llvm.prefet
r367051 - Revert "CodeGen: ensure placeholder instruction for cleanup is created"
Author: jfb
Date: Thu Jul 25 13:50:09 2019
New Revision: 367051
URL: http://llvm.org/viewvc/llvm-project?rev=367051&view=rev
Log:
Revert "CodeGen: ensure placeholder instruction for cleanup is created"
Originally in https://reviews.llvm.org/D64656
Causes bot failures:
/home/buildslave/buildslave/clang-cmake-armv8-full/llvm/tools/clang/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp:20:16:
error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: call void @_ZN1RC1E1Q(%struct.R* [[TMP_R]])
^
:37:2: note: scanning from here
%8 = call %struct.R* @_ZN1RC1E1Q(%struct.R* %1)
^
:37:2: note: with "TMP_R" equal to "%1"
%8 = call %struct.R* @_ZN1RC1E1Q(%struct.R* %1)
^
:37:17: note: possible intended match here
%8 = call %struct.R* @_ZN1RC1E1Q(%struct.R* %1)
^
Removed:
cfe/trunk/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp
Modified:
cfe/trunk/lib/CodeGen/CGExprAgg.cpp
Modified: cfe/trunk/lib/CodeGen/CGExprAgg.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprAgg.cpp?rev=367051&r1=367050&r2=367051&view=diff
==
--- cfe/trunk/lib/CodeGen/CGExprAgg.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGExprAgg.cpp Thu Jul 25 13:50:09 2019
@@ -1495,13 +1495,6 @@ void AggExprEmitter::VisitInitListExpr(I
// initializers throws an exception.
SmallVector cleanups;
llvm::Instruction *cleanupDominator = nullptr;
- auto addCleanup = [&](const EHScopeStack::stable_iterator &cleanup) {
-cleanups.push_back(cleanup);
-if (!cleanupDominator) // create placeholder once needed
- cleanupDominator = CGF.Builder.CreateAlignedLoad(
- CGF.Int8Ty, llvm::Constant::getNullValue(CGF.Int8PtrTy),
- CharUnits::One());
- };
unsigned curInitIndex = 0;
@@ -1526,7 +1519,7 @@ void AggExprEmitter::VisitInitListExpr(I
if (QualType::DestructionKind dtorKind =
Base.getType().isDestructedType()) {
CGF.pushDestroy(dtorKind, V, Base.getType());
-addCleanup(CGF.EHStack.stable_begin());
+cleanups.push_back(CGF.EHStack.stable_begin());
}
}
}
@@ -1603,9 +1596,15 @@ void AggExprEmitter::VisitInitListExpr(I
= field->getType().isDestructedType()) {
assert(LV.isSimple());
if (CGF.needsEHCleanup(dtorKind)) {
+if (!cleanupDominator)
+ cleanupDominator = CGF.Builder.CreateAlignedLoad(
+ CGF.Int8Ty,
+ llvm::Constant::getNullValue(CGF.Int8PtrTy),
+ CharUnits::One()); // placeholder
+
CGF.pushDestroy(EHCleanup, LV.getAddress(), field->getType(),
CGF.getDestroyer(dtorKind), false);
-addCleanup(CGF.EHStack.stable_begin());
+cleanups.push_back(CGF.EHStack.stable_begin());
pushedCleanup = true;
}
}
@@ -1621,8 +1620,6 @@ void AggExprEmitter::VisitInitListExpr(I
// Deactivate all the partial cleanups in reverse order, which
// generally means popping them.
- assert((cleanupDominator || cleanups.empty()) &&
- "Missing cleanupDominator before deactivating cleanup blocks");
for (unsigned i = cleanups.size(); i != 0; --i)
CGF.DeactivateCleanupBlock(cleanups[i-1], cleanupDominator);
Removed: cfe/trunk/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp?rev=367050&view=auto
==
--- cfe/trunk/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp
(original)
+++ cfe/trunk/test/CodeGenCXX/pr40771-ctad-with-lambda-copy-capture.cpp
(removed)
@@ -1,56 +0,0 @@
-// RUN: %clang_cc1 -emit-llvm --std=c++17 -fcxx-exceptions -fexceptions \
-// RUN: -discard-value-names %s -o - | FileCheck %s
-
-struct Q { Q(); };
-struct R { R(Q); ~R(); };
-struct S { S(Q); ~S(); };
-struct T : R, S {};
-
-Q q;
-T t { R{q}, S{q} };
-
-// CHECK-LABEL: define internal void @__cxx_global_var_init.1() {{.*}} {
-// CHECK-NEXT: [[TMP_R:%[a-z0-9.]+]] = alloca %struct.R, align 1
-// CHECK-NEXT: [[TMP_Q1:%[a-z0-9.]+]] = alloca %struct.Q, align 1
-// CHECK-NEXT: [[TMP_S:%[a-z0-9.]+]] = alloca %struct.S, align 1
-// CHECK-NEXT: [[TMP_Q2:%[a-z0-9.]+]] = alloca %struct.Q, align 1
-// CHECK-NEXT: [[XPT:%[a-z0-9.]+]] = alloca i8*
-// CHECK-NEXT: [[SLOT:%[a-z0-9.]+]] = alloca i32
-// CHECK-NEXT: [[ACTIVE:%[a-z0-9.]+]] = alloca i1, align 1
-// CHECK-NEXT: call void @_ZN1RC1E1Q(%struct.R* [[TMP_R]])
-// CHECK-NEXT: store i1 true, i1* [[ACTIVE]], align 1
-// CHECK-NEXT: invoke void @_ZN1SC1E1Q(%struct.S* [[TMP_S]])
-// CHECK-NEXT: to label %[[L1:[a-z0-9.]+]] unwind label %[[L2:[a-z0-9.]+]]
-// CHECK-EMPTY:
-// CHECK-NEXT: [[L1]]:
-// CHECK-NEXT: store i1 false, i1* [[ACTIVE]], align 1
-// CHECK-NEXT: call void @_ZN1SD1Ev(%struct.S*
-// CHECK-NEXT: call void @_ZN1RD1Ev(%struct.R*
-
r367274 - [NFC] avoid AlignedCharArray in clang
Author: jfb
Date: Mon Jul 29 16:12:48 2019
New Revision: 367274
URL: http://llvm.org/viewvc/llvm-project?rev=367274&view=rev
Log:
[NFC] avoid AlignedCharArray in clang
As discussed in D65249, don't use AlignedCharArray or std::aligned_storage.
Just use alignas(X) char Buf[Size];. This will allow me to remove
AlignedCharArray entirely, and works on the current minimum version of Visual
Studio.
Modified:
cfe/trunk/include/clang/AST/Expr.h
cfe/trunk/include/clang/Sema/Overload.h
cfe/trunk/lib/CodeGen/CGCleanup.cpp
cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp
cfe/trunk/lib/Sema/SemaOverload.cpp
cfe/trunk/lib/Sema/TypeLocBuilder.cpp
cfe/trunk/lib/Sema/TypeLocBuilder.h
Modified: cfe/trunk/include/clang/AST/Expr.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Expr.h?rev=367274&r1=367273&r2=367274&view=diff
==
--- cfe/trunk/include/clang/AST/Expr.h (original)
+++ cfe/trunk/include/clang/AST/Expr.h Mon Jul 29 16:12:48 2019
@@ -2619,9 +2619,8 @@ public:
/// + sizeof(Stmt *) bytes of storage, aligned to alignof(CallExpr):
///
/// \code{.cpp}
- /// llvm::AlignedCharArray Buffer;
- /// CallExpr *TheCall = CallExpr::CreateTemporary(Buffer.buffer, etc);
+ /// alignas(CallExpr) char Buffer[sizeof(CallExpr) + sizeof(Stmt *)];
+ /// CallExpr *TheCall = CallExpr::CreateTemporary(Buffer, etc);
/// \endcode
static CallExpr *CreateTemporary(void *Mem, Expr *Fn, QualType Ty,
ExprValueKind VK, SourceLocation RParenLoc,
Modified: cfe/trunk/include/clang/Sema/Overload.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Overload.h?rev=367274&r1=367273&r2=367274&view=diff
==
--- cfe/trunk/include/clang/Sema/Overload.h (original)
+++ cfe/trunk/include/clang/Sema/Overload.h Mon Jul 29 16:12:48 2019
@@ -881,7 +881,7 @@ class Sema;
constexpr static unsigned NumInlineBytes =
24 * sizeof(ImplicitConversionSequence);
unsigned NumInlineBytesUsed = 0;
-llvm::AlignedCharArray InlineSpace;
+alignas(void *) char InlineSpace[NumInlineBytes];
// Address space of the object being constructed.
LangAS DestAS = LangAS::Default;
@@ -904,7 +904,7 @@ class Sema;
unsigned NBytes = sizeof(T) * N;
if (NBytes > NumInlineBytes - NumInlineBytesUsed)
return SlabAllocator.Allocate(N);
- char *FreeSpaceStart = InlineSpace.buffer + NumInlineBytesUsed;
+ char *FreeSpaceStart = InlineSpace + NumInlineBytesUsed;
assert(uintptr_t(FreeSpaceStart) % alignof(void *) == 0 &&
"Misaligned storage!");
Modified: cfe/trunk/lib/CodeGen/CGCleanup.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGCleanup.cpp?rev=367274&r1=367273&r2=367274&view=diff
==
--- cfe/trunk/lib/CodeGen/CGCleanup.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGCleanup.cpp Mon Jul 29 16:12:48 2019
@@ -740,14 +740,15 @@ void CodeGenFunction::PopCleanupBlock(bo
// here. Unfortunately, if you ask for a SmallVector, the
// alignment isn't sufficient.
auto *CleanupSource = reinterpret_cast(Scope.getCleanupBuffer());
- llvm::AlignedCharArray CleanupBufferStack;
+ alignas(EHScopeStack::ScopeStackAlignment) char
+ CleanupBufferStack[8 * sizeof(void *)];
std::unique_ptr CleanupBufferHeap;
size_t CleanupSize = Scope.getCleanupSize();
EHScopeStack::Cleanup *Fn;
if (CleanupSize <= sizeof(CleanupBufferStack)) {
-memcpy(CleanupBufferStack.buffer, CleanupSource, CleanupSize);
-Fn = reinterpret_cast(CleanupBufferStack.buffer);
+memcpy(CleanupBufferStack, CleanupSource, CleanupSize);
+Fn = reinterpret_cast(CleanupBufferStack);
} else {
CleanupBufferHeap.reset(new char[CleanupSize]);
memcpy(CleanupBufferHeap.get(), CleanupSource, CleanupSize);
Modified: cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp?rev=367274&r1=367273&r2=367274&view=diff
==
--- cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp (original)
+++ cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp Mon Jul 29
16:12:48 2019
@@ -184,10 +184,11 @@ void DirectoryWatcherLinux::InotifyPolli
// the inotify file descriptor should have the same alignment as
// struct inotify_event.
- auto ManagedBuffer =
- llvm::make_unique>();
- char *const Buf = ManagedBuffer->buffer;
+ struct Buffer {
+alignas(struct inotify_event) char buffer[EventBufferLength];
+ };
+ auto ManagedBuffer = llvm::make_unique();
+ char *const Buf = ManagedBuffer.buffer;
const int EpollFD = epoll_create
r367276 - Fix Linux build
Author: jfb
Date: Mon Jul 29 16:28:44 2019
New Revision: 367276
URL: http://llvm.org/viewvc/llvm-project?rev=367276&view=rev
Log:
Fix Linux build
r367274 broke it
Modified:
cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp
Modified: cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp?rev=367276&r1=367275&r2=367276&view=diff
==
--- cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp (original)
+++ cfe/trunk/lib/DirectoryWatcher/linux/DirectoryWatcher-linux.cpp Mon Jul 29
16:28:44 2019
@@ -188,7 +188,7 @@ void DirectoryWatcherLinux::InotifyPolli
alignas(struct inotify_event) char buffer[EventBufferLength];
};
auto ManagedBuffer = llvm::make_unique();
- char *const Buf = ManagedBuffer.buffer;
+ char *const Buf = ManagedBuffer->buffer;
const int EpollFD = epoll_create1(EPOLL_CLOEXEC);
if (EpollFD == -1) {
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r367350 - [NFC] simplify Darwin environment handling
Author: jfb
Date: Tue Jul 30 13:01:46 2019
New Revision: 367350
URL: http://llvm.org/viewvc/llvm-project?rev=367350&view=rev
Log:
[NFC] simplify Darwin environment handling
The previous code detected conflicts through copy-pasta, this versions
uses a 'loop'.
Modified:
cfe/trunk/lib/Driver/ToolChains/Darwin.cpp
Modified: cfe/trunk/lib/Driver/ToolChains/Darwin.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Darwin.cpp?rev=367350&r1=367349&r2=367350&view=diff
==
--- cfe/trunk/lib/Driver/ToolChains/Darwin.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Darwin.cpp Tue Jul 30 13:01:46 2019
@@ -1480,22 +1480,6 @@ getDeploymentTargetFromEnvironmentVariab
Targets[I.index()] = Env;
}
- // Do not allow conflicts with the watchOS target.
- if (!Targets[Darwin::WatchOS].empty() &&
- (!Targets[Darwin::IPhoneOS].empty() || !Targets[Darwin::TvOS].empty())) {
-TheDriver.Diag(diag::err_drv_conflicting_deployment_targets)
-<< "WATCHOS_DEPLOYMENT_TARGET"
-<< (!Targets[Darwin::IPhoneOS].empty() ? "IPHONEOS_DEPLOYMENT_TARGET"
- : "TVOS_DEPLOYMENT_TARGET");
- }
-
- // Do not allow conflicts with the tvOS target.
- if (!Targets[Darwin::TvOS].empty() && !Targets[Darwin::IPhoneOS].empty()) {
-TheDriver.Diag(diag::err_drv_conflicting_deployment_targets)
-<< "TVOS_DEPLOYMENT_TARGET"
-<< "IPHONEOS_DEPLOYMENT_TARGET";
- }
-
// Allow conflicts among OSX and iOS for historical reasons, but choose the
// default platform.
if (!Targets[Darwin::MacOS].empty() &&
@@ -1508,6 +1492,18 @@ getDeploymentTargetFromEnvironmentVariab
else
Targets[Darwin::IPhoneOS] = Targets[Darwin::WatchOS] =
Targets[Darwin::TvOS] = "";
+ } else {
+// Don't allow conflicts in any other platform.
+int FirstTarget = llvm::array_lengthof(Targets);
+for (int I = 0; I != llvm::array_lengthof(Targets); ++I) {
+ if (Targets[I].empty())
+continue;
+ if (FirstTarget == llvm::array_lengthof(Targets))
+FirstTarget = I;
+ else
+TheDriver.Diag(diag::err_drv_conflicting_deployment_targets)
+<< Targets[FirstTarget] << Targets[I];
+}
}
for (const auto &Target : llvm::enumerate(llvm::makeArrayRef(Targets))) {
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[clang-tools-extra] r367383 - [NFC] Remove LLVM_ALIGNAS
Author: jfb Date: Tue Jul 30 20:22:08 2019 New Revision: 367383 URL: http://llvm.org/viewvc/llvm-project?rev=367383&view=rev Log: [NFC] Remove LLVM_ALIGNAS Summary: The minimum compilers support all have alignas, and we don't use LLVM_ALIGNAS anywhere anymore. This also removes an MSVC diagnostic which, according to the comment above, isn't relevant anymore. Reviewers: rnk Subscribers: mgorny, jkorous, dexonsmith, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65458 Modified: clang-tools-extra/trunk/docs/doxygen.cfg.in Modified: clang-tools-extra/trunk/docs/doxygen.cfg.in URL: http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/docs/doxygen.cfg.in?rev=367383&r1=367382&r2=367383&view=diff == --- clang-tools-extra/trunk/docs/doxygen.cfg.in (original) +++ clang-tools-extra/trunk/docs/doxygen.cfg.in Tue Jul 30 20:22:08 2019 @@ -1937,7 +1937,7 @@ INCLUDE_FILE_PATTERNS = # recursively expanded use the := operator instead of the = operator. # This tag requires that the tag ENABLE_PREPROCESSING is set to YES. -PREDEFINED = LLVM_ALIGNAS(x)= +PREDEFINED = # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this # tag can be used to specify a list of macro names that should be expanded. The ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r367383 - [NFC] Remove LLVM_ALIGNAS
Author: jfb Date: Tue Jul 30 20:22:08 2019 New Revision: 367383 URL: http://llvm.org/viewvc/llvm-project?rev=367383&view=rev Log: [NFC] Remove LLVM_ALIGNAS Summary: The minimum compilers support all have alignas, and we don't use LLVM_ALIGNAS anywhere anymore. This also removes an MSVC diagnostic which, according to the comment above, isn't relevant anymore. Reviewers: rnk Subscribers: mgorny, jkorous, dexonsmith, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65458 Modified: cfe/trunk/docs/doxygen.cfg.in Modified: cfe/trunk/docs/doxygen.cfg.in URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/doxygen.cfg.in?rev=367383&r1=367382&r2=367383&view=diff == --- cfe/trunk/docs/doxygen.cfg.in (original) +++ cfe/trunk/docs/doxygen.cfg.in Tue Jul 30 20:22:08 2019 @@ -1925,7 +1925,7 @@ INCLUDE_FILE_PATTERNS = # recursively expanded use the := operator instead of the = operator. # This tag requires that the tag ENABLE_PREPROCESSING is set to YES. -PREDEFINED = LLVM_ALIGNAS(x)= +PREDEFINED = # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this # tag can be used to specify a list of macro names that should be expanded. The ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r367889 - [docs] document -Weveything more betterer
Author: jfb Date: Mon Aug 5 09:53:45 2019 New Revision: 367889 URL: http://llvm.org/viewvc/llvm-project?rev=367889&view=rev Log: [docs] document -Weveything more betterer Reviewers: aaron.ballman Subscribers: jkorous, dexonsmith, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D65706 Modified: cfe/trunk/docs/UsersManual.rst Modified: cfe/trunk/docs/UsersManual.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367889&r1=367888&r2=367889&view=diff == --- cfe/trunk/docs/UsersManual.rst (original) +++ cfe/trunk/docs/UsersManual.rst Mon Aug 5 09:53:45 2019 @@ -992,13 +992,24 @@ is treated as a system header. Enabling All Diagnostics ^ -In addition to the traditional ``-W`` flags, one can enable **all** -diagnostics by passing :option:`-Weverything`. This works as expected -with -:option:`-Werror`, and also includes the warnings from :option:`-pedantic`. +In addition to the traditional ``-W`` flags, one can enable **all** diagnostics +by passing :option:`-Weverything`. This works as expected with +:option:`-Werror`, and also includes the warnings from :option:`-pedantic`. Some +diagnostics contradict each other, therefore, users of :option:`-Weverything` +often disable many diagnostics such as :option:`-Wno-c++98-compat` +:option:`-Wno-c++-compat` because they contradict recent C++ standards. -Note that when combined with :option:`-w` (which disables all warnings), that -flag wins. +Since :option:`-Weverything` enables every diagnostic, we generally don't +recommend using it. :option:`-Wall` :option:`-Wextra` are a better choice for +most projects. Using :option:`-Weverything` means that updating your compiler is +more difficult because you're exposed to experimental diagnostics which might be +of lower quality than the default ones. If you do use :option:`-Weverything` +then we advise that you address all new compiler diagnostics as they get added +to Clang, either by fixing everything they find or explicitly disabling that +diagnostic with its corresponding `Wno-` option. + +Note that when combined with :option:`-w` (which disables all warnings), +disabling all warnings wins. Controlling Static Analyzer Diagnostics ^^^ ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r367914 - [docs] don't use :option: for C++ compat
Author: jfb Date: Mon Aug 5 12:45:23 2019 New Revision: 367914 URL: http://llvm.org/viewvc/llvm-project?rev=367914&view=rev Log: [docs] don't use :option: for C++ compat The bots are sad that they're not documented. Modified: cfe/trunk/docs/UsersManual.rst Modified: cfe/trunk/docs/UsersManual.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367914&r1=367913&r2=367914&view=diff == --- cfe/trunk/docs/UsersManual.rst (original) +++ cfe/trunk/docs/UsersManual.rst Mon Aug 5 12:45:23 2019 @@ -996,8 +996,8 @@ In addition to the traditional ``-W`` fl by passing :option:`-Weverything`. This works as expected with :option:`-Werror`, and also includes the warnings from :option:`-pedantic`. Some diagnostics contradict each other, therefore, users of :option:`-Weverything` -often disable many diagnostics such as :option:`-Wno-c++98-compat` -:option:`-Wno-c++-compat` because they contradict recent C++ standards. +often disable many diagnostics such as `-Wno-c++98-compat` and `-Wno-c++-compat` +because they contradict recent C++ standards. Since :option:`-Weverything` enables every diagnostic, we generally don't recommend using it. :option:`-Wall` :option:`-Wextra` are a better choice for ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: r367889 - [docs] document -Weveything more betterer
Fixed. I guess we should document those... > On Aug 5, 2019, at 10:51 AM, Nico Weber wrote: > > This breaks the sphinx bot: > > http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/45204/steps/docs-clang-html/logs/stdio > > <http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/45204/steps/docs-clang-html/logs/stdio> > > Warning, treated as error: > /home/buildbot/llvm-build-dir/clang-sphinx-docs/llvm/src/tools/clang/docs/UsersManual.rst:995: > WARNING: unknown option: -Wno-c++98-compat > > On Mon, Aug 5, 2019 at 12:52 PM JF Bastien via cfe-commits > mailto:cfe-commits@lists.llvm.org>> wrote: > Author: jfb > Date: Mon Aug 5 09:53:45 2019 > New Revision: 367889 > > URL: http://llvm.org/viewvc/llvm-project?rev=367889&view=rev > <http://llvm.org/viewvc/llvm-project?rev=367889&view=rev> > Log: > [docs] document -Weveything more betterer > > Reviewers: aaron.ballman > > Subscribers: jkorous, dexonsmith, cfe-commits > > Tags: #clang > > Differential Revision: https://reviews.llvm.org/D65706 > <https://reviews.llvm.org/D65706> > > Modified: > cfe/trunk/docs/UsersManual.rst > > Modified: cfe/trunk/docs/UsersManual.rst > URL: > http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367889&r1=367888&r2=367889&view=diff > > <http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367889&r1=367888&r2=367889&view=diff> > == > --- cfe/trunk/docs/UsersManual.rst (original) > +++ cfe/trunk/docs/UsersManual.rst Mon Aug 5 09:53:45 2019 > @@ -992,13 +992,24 @@ is treated as a system header. > Enabling All Diagnostics > ^ > > -In addition to the traditional ``-W`` flags, one can enable **all** > -diagnostics by passing :option:`-Weverything`. This works as expected > -with > -:option:`-Werror`, and also includes the warnings from :option:`-pedantic`. > +In addition to the traditional ``-W`` flags, one can enable **all** > diagnostics > +by passing :option:`-Weverything`. This works as expected with > +:option:`-Werror`, and also includes the warnings from :option:`-pedantic`. > Some > +diagnostics contradict each other, therefore, users of :option:`-Weverything` > +often disable many diagnostics such as :option:`-Wno-c++98-compat` > +:option:`-Wno-c++-compat` because they contradict recent C++ standards. > > -Note that when combined with :option:`-w` (which disables all warnings), that > -flag wins. > +Since :option:`-Weverything` enables every diagnostic, we generally don't > +recommend using it. :option:`-Wall` :option:`-Wextra` are a better choice for > +most projects. Using :option:`-Weverything` means that updating your > compiler is > +more difficult because you're exposed to experimental diagnostics which > might be > +of lower quality than the default ones. If you do use :option:`-Weverything` > +then we advise that you address all new compiler diagnostics as they get > added > +to Clang, either by fixing everything they find or explicitly disabling that > +diagnostic with its corresponding `Wno-` option. > + > +Note that when combined with :option:`-w` (which disables all warnings), > +disabling all warnings wins. > > Controlling Static Analyzer Diagnostics > ^^^ > > > ___ > cfe-commits mailing list > cfe-commits@lists.llvm.org <mailto:cfe-commits@lists.llvm.org> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits > <https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits> ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r367918 - [docs] don't use :option: for Wall Wextra
Author: jfb Date: Mon Aug 5 12:59:07 2019 New Revision: 367918 URL: http://llvm.org/viewvc/llvm-project?rev=367918&view=rev Log: [docs] don't use :option: for Wall Wextra The bots are sad that they're not documented. Modified: cfe/trunk/docs/UsersManual.rst Modified: cfe/trunk/docs/UsersManual.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367918&r1=367917&r2=367918&view=diff == --- cfe/trunk/docs/UsersManual.rst (original) +++ cfe/trunk/docs/UsersManual.rst Mon Aug 5 12:59:07 2019 @@ -1000,13 +1000,13 @@ often disable many diagnostics such as ` because they contradict recent C++ standards. Since :option:`-Weverything` enables every diagnostic, we generally don't -recommend using it. :option:`-Wall` :option:`-Wextra` are a better choice for -most projects. Using :option:`-Weverything` means that updating your compiler is -more difficult because you're exposed to experimental diagnostics which might be -of lower quality than the default ones. If you do use :option:`-Weverything` -then we advise that you address all new compiler diagnostics as they get added -to Clang, either by fixing everything they find or explicitly disabling that -diagnostic with its corresponding `Wno-` option. +recommend using it. `-Wall` `-Wextra` are a better choice for most projects. +Using :option:`-Weverything` means that updating your compiler is more difficult +because you're exposed to experimental diagnostics which might be of lower +quality than the default ones. If you do use :option:`-Weverything` then we +advise that you address all new compiler diagnostics as they get added to Clang, +either by fixing everything they find or explicitly disabling that diagnostic +with its corresponding `Wno-` option. Note that when combined with :option:`-w` (which disables all warnings), disabling all warnings wins. ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: r367889 - [docs] document -Weveything more betterer
Ugh this is silly… fixed again. > On Aug 5, 2019, at 12:55 PM, Nico Weber wrote: > > Still sad, now with a different message: > http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/45220 > <http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/45220> > > /home/buildbot/llvm-build-dir/clang-sphinx-docs/llvm/src/tools/clang/docs/UsersManual.rst:1002: > WARNING: unknown option: -Wall > > On Mon, Aug 5, 2019 at 3:46 PM JF Bastien <mailto:jfbast...@apple.com>> wrote: > Fixed. I guess we should document those... > >> On Aug 5, 2019, at 10:51 AM, Nico Weber > <mailto:tha...@chromium.org>> wrote: >> >> This breaks the sphinx bot: >> >> http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/45204/steps/docs-clang-html/logs/stdio >> >> <http://lab.llvm.org:8011/builders/clang-sphinx-docs/builds/45204/steps/docs-clang-html/logs/stdio> >> >> Warning, treated as error: >> /home/buildbot/llvm-build-dir/clang-sphinx-docs/llvm/src/tools/clang/docs/UsersManual.rst:995: >> WARNING: unknown option: -Wno-c++98-compat >> >> On Mon, Aug 5, 2019 at 12:52 PM JF Bastien via cfe-commits >> mailto:cfe-commits@lists.llvm.org>> wrote: >> Author: jfb >> Date: Mon Aug 5 09:53:45 2019 >> New Revision: 367889 >> >> URL: http://llvm.org/viewvc/llvm-project?rev=367889&view=rev >> <http://llvm.org/viewvc/llvm-project?rev=367889&view=rev> >> Log: >> [docs] document -Weveything more betterer >> >> Reviewers: aaron.ballman >> >> Subscribers: jkorous, dexonsmith, cfe-commits >> >> Tags: #clang >> >> Differential Revision: https://reviews.llvm.org/D65706 >> <https://reviews.llvm.org/D65706> >> >> Modified: >> cfe/trunk/docs/UsersManual.rst >> >> Modified: cfe/trunk/docs/UsersManual.rst >> URL: >> http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367889&r1=367888&r2=367889&view=diff >> >> <http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/UsersManual.rst?rev=367889&r1=367888&r2=367889&view=diff> >> == >> --- cfe/trunk/docs/UsersManual.rst (original) >> +++ cfe/trunk/docs/UsersManual.rst Mon Aug 5 09:53:45 2019 >> @@ -992,13 +992,24 @@ is treated as a system header. >> Enabling All Diagnostics >> ^ >> >> -In addition to the traditional ``-W`` flags, one can enable **all** >> -diagnostics by passing :option:`-Weverything`. This works as expected >> -with >> -:option:`-Werror`, and also includes the warnings from :option:`-pedantic`. >> +In addition to the traditional ``-W`` flags, one can enable **all** >> diagnostics >> +by passing :option:`-Weverything`. This works as expected with >> +:option:`-Werror`, and also includes the warnings from :option:`-pedantic`. >> Some >> +diagnostics contradict each other, therefore, users of >> :option:`-Weverything` >> +often disable many diagnostics such as :option:`-Wno-c++98-compat` >> +:option:`-Wno-c++-compat` because they contradict recent C++ standards. >> >> -Note that when combined with :option:`-w` (which disables all warnings), >> that >> -flag wins. >> +Since :option:`-Weverything` enables every diagnostic, we generally don't >> +recommend using it. :option:`-Wall` :option:`-Wextra` are a better choice >> for >> +most projects. Using :option:`-Weverything` means that updating your >> compiler is >> +more difficult because you're exposed to experimental diagnostics which >> might be >> +of lower quality than the default ones. If you do use :option:`-Weverything` >> +then we advise that you address all new compiler diagnostics as they get >> added >> +to Clang, either by fixing everything they find or explicitly disabling that >> +diagnostic with its corresponding `Wno-` option. >> + >> +Note that when combined with :option:`-w` (which disables all warnings), >> +disabling all warnings wins. >> >> Controlling Static Analyzer Diagnostics >> ^^^ >> >> >> ___ >> cfe-commits mailing list >> cfe-commits@lists.llvm.org <mailto:cfe-commits@lists.llvm.org> >> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits >> <https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits> > ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
r368939 - Remove LVALUE / RVALUE workarounds
Author: jfb
Date: Wed Aug 14 15:48:12 2019
New Revision: 368939
URL: http://llvm.org/viewvc/llvm-project?rev=368939&view=rev
Log:
Remove LVALUE / RVALUE workarounds
Summary: LLVM_HAS_RVALUE_REFERENCE_THIS and LLVM_LVALUE_FUNCTION shouldn't be
needed anymore because the minimum compiler versions support them.
Subscribers: jkorous, dexonsmith, cfe-commits, llvm-commits, hans, thakis,
chandlerc, rnk
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D66240
Modified:
cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
Modified:
cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h?rev=368939&r1=368938&r2=368939&view=diff
==
--- cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
(original)
+++ cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
Wed Aug 14 15:48:12 2019
@@ -167,7 +167,7 @@ public:
const ProgramStateRef &getState() const { return State; }
template
- Optional getLocationAs() const LLVM_LVALUE_FUNCTION {
+ Optional getLocationAs() const & {
return Location.getAs();
}
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r364464 - BitStream reader: propagate errors
Author: jfb
Date: Wed Jun 26 12:50:12 2019
New Revision: 364464
URL: http://llvm.org/viewvc/llvm-project?rev=364464&view=rev
Log:
BitStream reader: propagate errors
The bitstream reader handles errors poorly. This has two effects:
* Bugs in file handling (especially modules) manifest as an "unexpected end of
file" crash
* Users of clang as a library end up aborting because the code unconditionally
calls `report_fatal_error`
The bitstream reader should be more resilient and return Expected / Error as
soon as an error is encountered, not way late like it does now. This patch
starts doing so and adopting the error handling where I think it makes sense.
There's plenty more to do: this patch propagates errors to be minimally useful,
and follow-ups will propagate them further and improve diagnostics.
https://bugs.llvm.org/show_bug.cgi?id=42311
Differential Revision: https://reviews.llvm.org/D63518
Modified:
cfe/trunk/include/clang/Basic/Diagnostic.h
cfe/trunk/include/clang/Frontend/FrontendAction.h
cfe/trunk/include/clang/Serialization/ASTReader.h
cfe/trunk/include/clang/Serialization/GlobalModuleIndex.h
cfe/trunk/lib/Frontend/ASTUnit.cpp
cfe/trunk/lib/Frontend/CompilerInstance.cpp
cfe/trunk/lib/Frontend/FrontendAction.cpp
cfe/trunk/lib/Frontend/PrecompiledPreamble.cpp
cfe/trunk/lib/Frontend/Rewrite/FrontendActions.cpp
cfe/trunk/lib/Frontend/SerializedDiagnosticReader.cpp
cfe/trunk/lib/Frontend/TestModuleFileExtension.cpp
cfe/trunk/lib/Serialization/ASTReader.cpp
cfe/trunk/lib/Serialization/ASTReaderDecl.cpp
cfe/trunk/lib/Serialization/ASTReaderStmt.cpp
cfe/trunk/lib/Serialization/GlobalModuleIndex.cpp
cfe/trunk/test/Index/pch-from-libclang.c
Modified: cfe/trunk/include/clang/Basic/Diagnostic.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/Diagnostic.h?rev=364464&r1=364463&r2=364464&view=diff
==
--- cfe/trunk/include/clang/Basic/Diagnostic.h (original)
+++ cfe/trunk/include/clang/Basic/Diagnostic.h Wed Jun 26 12:50:12 2019
@@ -25,6 +25,7 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Error.h"
#include
#include
#include
@@ -1303,6 +1304,12 @@ inline DiagnosticBuilder DiagnosticsEngi
return DiagnosticBuilder(this);
}
+inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
+ llvm::Error &&E) {
+ DB.AddString(toString(std::move(E)));
+ return DB;
+}
+
inline DiagnosticBuilder DiagnosticsEngine::Report(unsigned DiagID) {
return Report(SourceLocation(), DiagID);
}
Modified: cfe/trunk/include/clang/Frontend/FrontendAction.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/FrontendAction.h?rev=364464&r1=364463&r2=364464&view=diff
==
--- cfe/trunk/include/clang/Frontend/FrontendAction.h (original)
+++ cfe/trunk/include/clang/Frontend/FrontendAction.h Wed Jun 26 12:50:12 2019
@@ -23,6 +23,7 @@
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/FrontendOptions.h"
#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Error.h"
#include
#include
#include
@@ -229,7 +230,7 @@ public:
bool BeginSourceFile(CompilerInstance &CI, const FrontendInputFile &Input);
/// Set the source manager's main input file, and run the action.
- bool Execute();
+ llvm::Error Execute();
/// Perform any per-file post processing, deallocate per-file
/// objects, and run statistics and output file cleanup code.
Modified: cfe/trunk/include/clang/Serialization/ASTReader.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Serialization/ASTReader.h?rev=364464&r1=364463&r2=364464&view=diff
==
--- cfe/trunk/include/clang/Serialization/ASTReader.h (original)
+++ cfe/trunk/include/clang/Serialization/ASTReader.h Wed Jun 26 12:50:12 2019
@@ -1437,6 +1437,7 @@ private:
void Error(StringRef Msg) const;
void Error(unsigned DiagID, StringRef Arg1 = StringRef(),
StringRef Arg2 = StringRef()) const;
+ void Error(llvm::Error &&Err) const;
public:
/// Load the AST file and validate its contents against the given
@@ -2379,7 +2380,8 @@ public:
/// Reads a record with id AbbrevID from Cursor, resetting the
/// internal state.
- unsigned readRecord(llvm::BitstreamCursor &Cursor, unsigned AbbrevID);
+ Expected readRecord(llvm::BitstreamCursor &Cursor,
+unsigned AbbrevID);
/// Is this a module file for a module (rather than a PCH or similar).
bool isModule() const { return F->isModule(); }
@@ -2679,7 +2681,10 @@ struct SavedStreamPosition {
: Cursor(Cursor), Offset(Cursor.GetCurrentBitNo()) {}
~SavedStreamPosition()
[clang-tools-extra] r364464 - BitStream reader: propagate errors
Author: jfb
Date: Wed Jun 26 12:50:12 2019
New Revision: 364464
URL: http://llvm.org/viewvc/llvm-project?rev=364464&view=rev
Log:
BitStream reader: propagate errors
The bitstream reader handles errors poorly. This has two effects:
* Bugs in file handling (especially modules) manifest as an "unexpected end of
file" crash
* Users of clang as a library end up aborting because the code unconditionally
calls `report_fatal_error`
The bitstream reader should be more resilient and return Expected / Error as
soon as an error is encountered, not way late like it does now. This patch
starts doing so and adopting the error handling where I think it makes sense.
There's plenty more to do: this patch propagates errors to be minimally useful,
and follow-ups will propagate them further and improve diagnostics.
https://bugs.llvm.org/show_bug.cgi?id=42311
Differential Revision: https://reviews.llvm.org/D63518
Modified:
clang-tools-extra/trunk/clang-doc/BitcodeReader.cpp
clang-tools-extra/trunk/clang-doc/BitcodeWriter.cpp
clang-tools-extra/trunk/clang-doc/BitcodeWriter.h
clang-tools-extra/trunk/clangd/ClangdUnit.cpp
clang-tools-extra/trunk/clangd/CodeComplete.cpp
clang-tools-extra/trunk/clangd/index/Background.cpp
clang-tools-extra/trunk/clangd/unittests/HeadersTests.cpp
Modified: clang-tools-extra/trunk/clang-doc/BitcodeReader.cpp
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/clang-doc/BitcodeReader.cpp?rev=364464&r1=364463&r2=364464&view=diff
==
--- clang-tools-extra/trunk/clang-doc/BitcodeReader.cpp (original)
+++ clang-tools-extra/trunk/clang-doc/BitcodeReader.cpp Wed Jun 26 12:50:12 2019
@@ -491,24 +491,27 @@ template
llvm::Error ClangDocBitcodeReader::readRecord(unsigned ID, T I) {
Record R;
llvm::StringRef Blob;
- unsigned RecID = Stream.readRecord(ID, R, &Blob);
- return parseRecord(R, RecID, Blob, I);
+ llvm::Expected MaybeRecID = Stream.readRecord(ID, R, &Blob);
+ if (!MaybeRecID)
+return MaybeRecID.takeError();
+ return parseRecord(R, MaybeRecID.get(), Blob, I);
}
template <>
llvm::Error ClangDocBitcodeReader::readRecord(unsigned ID, Reference *I) {
Record R;
llvm::StringRef Blob;
- unsigned RecID = Stream.readRecord(ID, R, &Blob);
- return parseRecord(R, RecID, Blob, I, CurrentReferenceField);
+ llvm::Expected MaybeRecID = Stream.readRecord(ID, R, &Blob);
+ if (!MaybeRecID)
+return MaybeRecID.takeError();
+ return parseRecord(R, MaybeRecID.get(), Blob, I, CurrentReferenceField);
}
// Read a block of records into a single info.
template
llvm::Error ClangDocBitcodeReader::readBlock(unsigned ID, T I) {
- if (Stream.EnterSubBlock(ID))
-return llvm::make_error("Unable to enter subblock.\n",
- llvm::inconvertibleErrorCode());
+ if (llvm::Error Err = Stream.EnterSubBlock(ID))
+return Err;
while (true) {
unsigned BlockOrCode = 0;
@@ -521,9 +524,9 @@ llvm::Error ClangDocBitcodeReader::readB
case Cursor::BlockEnd:
return llvm::Error::success();
case Cursor::BlockBegin:
- if (auto Err = readSubBlock(BlockOrCode, I)) {
-if (!Stream.SkipBlock())
- continue;
+ if (llvm::Error Err = readSubBlock(BlockOrCode, I)) {
+if (llvm::Error Skipped = Stream.SkipBlock())
+ return joinErrors(std::move(Err), std::move(Skipped));
return Err;
}
continue;
@@ -605,18 +608,34 @@ ClangDocBitcodeReader::skipUntilRecordOr
BlockOrRecordID = 0;
while (!Stream.AtEndOfStream()) {
-unsigned Code = Stream.ReadCode();
+Expected MaybeCode = Stream.ReadCode();
+if (!MaybeCode) {
+ // FIXME this drops the error on the floor.
+ consumeError(MaybeCode.takeError());
+ return Cursor::BadBlock;
+}
-switch ((llvm::bitc::FixedAbbrevIDs)Code) {
+// FIXME check that the enum is in range.
+auto Code = static_cast(MaybeCode.get());
+
+switch (Code) {
case llvm::bitc::ENTER_SUBBLOCK:
- BlockOrRecordID = Stream.ReadSubBlockID();
+ if (Expected MaybeID = Stream.ReadSubBlockID())
+BlockOrRecordID = MaybeID.get();
+ else {
+// FIXME this drops the error on the floor.
+consumeError(MaybeID.takeError());
+ }
return Cursor::BlockBegin;
case llvm::bitc::END_BLOCK:
if (Stream.ReadBlockEnd())
return Cursor::BadBlock;
return Cursor::BlockEnd;
case llvm::bitc::DEFINE_ABBREV:
- Stream.ReadAbbrevRecord();
+ if (llvm::Error Err = Stream.ReadAbbrevRecord()) {
+// FIXME this drops the error on the floor.
+consumeError(std::move(Err));
+ }
continue;
case llvm::bitc::UNABBREV_RECORD:
return Cursor::BadBlock;
@@ -634,17 +653,24 @@ llvm::Error ClangDocBitcodeReader::valid
llvm::inconvertibleErrorCode());
// Sniff for
r364855 - Fix breakage introduced by D60974
Author: jfb Date: Mon Jul 1 14:57:31 2019 New Revision: 364855 URL: http://llvm.org/viewvc/llvm-project?rev=364855&view=rev Log: Fix breakage introduced by D60974 D60974 added tests which incorrectly assume that llvm-readelf is available. This is a bad assumption, it should instead declare the dependency explicitly in the tests. Modified: cfe/trunk/test/CMakeLists.txt Modified: cfe/trunk/test/CMakeLists.txt URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CMakeLists.txt?rev=364855&r1=364854&r2=364855&view=diff == --- cfe/trunk/test/CMakeLists.txt (original) +++ cfe/trunk/test/CMakeLists.txt Mon Jul 1 14:57:31 2019 @@ -112,6 +112,7 @@ if( NOT CLANG_BUILT_STANDALONE ) llvm-nm llvm-objdump llvm-profdata +llvm-readelf llvm-readobj llvm-symbolizer opt ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: r365030 - Make a buildbot using a buggy gcc happy
Kristof,
It looks like your fix didn’t address all the bots:
/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/lib/Analysis/Dominators.cpp:14:48:
error: explicit specialization of 'anchor' after instantiation
void CFGDominatorTreeImpl::anchor() {}
^
/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/include/clang/Analysis/Analyses/Dominators.h:225:3:
note: implicit instantiation first required here
ControlDependencyCalculator(CFG *cfg)
^
Can you please address the issue?
http://green.lab.llvm.org/green/job/clang-stage2-coverage-R/4153/consoleFull
Thanks,
JF
> On Jul 3, 2019, at 5:06 AM, Kristof Umann via cfe-commits
> wrote:
>
> Author: szelethus
> Date: Wed Jul 3 05:06:10 2019
> New Revision: 365030
>
> URL: http://llvm.org/viewvc/llvm-project?rev=365030&view=rev
> Log:
> Make a buildbot using a buggy gcc happy
>
> When specializing a template in a namespace, it has to be in a namespace
> block, else gcc will get confused. Hopefully this fixes the issue.
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480
>
> Modified:
>cfe/trunk/lib/Analysis/Dominators.cpp
>
> Modified: cfe/trunk/lib/Analysis/Dominators.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/Dominators.cpp?rev=365030&r1=365029&r2=365030&view=diff
> ==
> --- cfe/trunk/lib/Analysis/Dominators.cpp (original)
> +++ cfe/trunk/lib/Analysis/Dominators.cpp Wed Jul 3 05:06:10 2019
> @@ -8,10 +8,12 @@
>
> #include "clang/Analysis/Analyses/Dominators.h"
>
> -using namespace clang;
> +namespace clang {
>
> template <>
> -void clang::CFGDominatorTreeImpl::anchor() {}
> +void CFGDominatorTreeImpl::anchor() {}
>
> template <>
> -void clang::CFGDominatorTreeImpl::anchor() {}
> +void CFGDominatorTreeImpl::anchor() {}
> +
> +} // end of namespace clang
>
>
> ___
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> cfe-commits@lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
___
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Re: r365030 - Make a buildbot using a buggy gcc happy
Thanks Richard!
> On Jul 8, 2019, at 12:46 PM, Richard Smith via cfe-commits
> wrote:
>
> Committed as r365377.
>
> On Mon, 8 Jul 2019 at 12:43, Kristóf Umann via cfe-commits
> mailto:cfe-commits@lists.llvm.org>> wrote:
> Thank you so much! Sorry for the inconvencience, I'll be that much more
> careful next time :)
>
> =) No worries. It's one of those pesky "no diagnostic required" cases;
> they're often a pain.
>
> On Mon, 8 Jul 2019, 21:42 Richard Smith, <mailto:rich...@metafoo.co.uk>> wrote:
> I'll commit the change below once my testing finishes :)
>
> On Mon, 8 Jul 2019 at 12:40, Kristóf Umann via cfe-commits
> mailto:cfe-commits@lists.llvm.org>> wrote:
> Noted, thanks! Gabor, could you please fix this?
>
> On Mon, 8 Jul 2019, 21:37 Richard Smith, <mailto:rich...@metafoo.co.uk>> wrote:
> This is in any case the wrong fix. The code *is* wrong, for the reason this
> compiler is reporting.
>
> The correct fix is to declare the explicit specializations in the header file:
>
> template <> void CFGDominatorTreeImpl::anchor();
> template <> void CFGDominatorTreeImpl::anchor();
>
> Clang will tell you to do this under -Wundefined-func-template (which we
> haven't turned on by default because people get this wrong too often...).
>
> On Mon, 8 Jul 2019 at 12:29, JF Bastien via cfe-commits
> mailto:cfe-commits@lists.llvm.org>> wrote:
> Kristof,
>
> It looks like your fix didn’t address all the bots:
>
> /Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/lib/Analysis/Dominators.cpp:14:48:
> error: explicit specialization of 'anchor' after instantiation
> void CFGDominatorTreeImpl::anchor() {}
>^
> /Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/include/clang/Analysis/Analyses/Dominators.h:225:3:
> note: implicit instantiation first required here
> ControlDependencyCalculator(CFG *cfg)
> ^
>
> Can you please address the issue?
> http://green.lab.llvm.org/green/job/clang-stage2-coverage-R/4153/consoleFull
> <http://green.lab.llvm.org/green/job/clang-stage2-coverage-R/4153/consoleFull>
>
> Thanks,
>
> JF
>
>
>> On Jul 3, 2019, at 5:06 AM, Kristof Umann via cfe-commits
>> mailto:cfe-commits@lists.llvm.org>> wrote:
>>
>> Author: szelethus
>> Date: Wed Jul 3 05:06:10 2019
>> New Revision: 365030
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=365030&view=rev
>> <http://llvm.org/viewvc/llvm-project?rev=365030&view=rev>
>> Log:
>> Make a buildbot using a buggy gcc happy
>>
>> When specializing a template in a namespace, it has to be in a namespace
>> block, else gcc will get confused. Hopefully this fixes the issue.
>>
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480
>> <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480>
>>
>> Modified:
>>cfe/trunk/lib/Analysis/Dominators.cpp
>>
>> Modified: cfe/trunk/lib/Analysis/Dominators.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/Dominators.cpp?rev=365030&r1=365029&r2=365030&view=diff
>>
>> <http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Analysis/Dominators.cpp?rev=365030&r1=365029&r2=365030&view=diff>
>> ==
>> --- cfe/trunk/lib/Analysis/Dominators.cpp (original)
>> +++ cfe/trunk/lib/Analysis/Dominators.cpp Wed Jul 3 05:06:10 2019
>> @@ -8,10 +8,12 @@
>>
>> #include "clang/Analysis/Analyses/Dominators.h"
>>
>> -using namespace clang;
>> +namespace clang {
>>
>> template <>
>> -void clang::CFGDominatorTreeImpl::anchor() {}
>> +void CFGDominatorTreeImpl::anchor() {}
>>
>> template <>
>> -void clang::CFGDominatorTreeImpl::anchor() {}
>> +void CFGDominatorTreeImpl::anchor() {}
>> +
>> +} // end of namespace clang
>>
>>
>> ___
>> cfe-commits mailing list
>> cfe-commits@lists.llvm.org <mailto:cfe-commits@lists.llvm.org>
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
>> <https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits>
>
> ___
> cfe-commits mailing list
> cfe-commits@lists.llvm.org <mailto:cfe-commits@lists.llvm.org>
> https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
> <https://lists.ll
r349442 - Automatic variable initialization
Author: jfb Date: Mon Dec 17 21:12:21 2018 New Revision: 349442 URL: http://llvm.org/viewvc/llvm-project?rev=349442&view=rev Log: Automatic variable initialization Summary: Add an option to initialize automatic variables with either a pattern or with zeroes. The default is still that automatic variables are uninitialized. Also add attributes to request uninitialized on a per-variable basis, mainly to disable initialization of large stack arrays when deemed too expensive. This isn't meant to change the semantics of C and C++. Rather, it's meant to be a last-resort when programmers inadvertently have some undefined behavior in their code. This patch aims to make undefined behavior hurt less, which security-minded people will be very happy about. Notably, this means that there's no inadvertent information leak when: - The compiler re-uses stack slots, and a value is used uninitialized. - The compiler re-uses a register, and a value is used uninitialized. - Stack structs / arrays / unions with padding are copied. This patch only addresses stack and register information leaks. There's many more infoleaks that we could address, and much more undefined behavior that could be tamed. Let's keep this patch focused, and I'm happy to address related issues elsewhere. To keep the patch simple, only some `undef` is removed for now, see `replaceUndef`. The padding-related infoleaks are therefore not all gone yet. This will be addressed in a follow-up, mainly because addressing padding-related leaks should be a stand-alone option which is implied by variable initialization. There are three options when it comes to automatic variable initialization: 0. Uninitialized This is C and C++'s default. It's not changing. Depending on code generation, a programmer who runs into undefined behavior by using an uninialized automatic variable may observe any previous value (including program secrets), or any value which the compiler saw fit to materialize on the stack or in a register (this could be to synthesize an immediate, to refer to code or data locations, to generate cookies, etc). 1. Pattern initialization This is the recommended initialization approach. Pattern initialization's goal is to initialize automatic variables with values which will likely transform logic bugs into crashes down the line, are easily recognizable in a crash dump, without being values which programmers can rely on for useful program semantics. At the same time, pattern initialization tries to generate code which will optimize well. You'll find the following details in `patternFor`: - Integers are initialized with repeated 0xAA bytes (infinite scream). - Vectors of integers are also initialized with infinite scream. - Pointers are initialized with infinite scream on 64-bit platforms because it's an unmappable pointer value on architectures I'm aware of. Pointers are initialize to 0x00AA (small scream) on 32-bit platforms because 32-bit platforms don't consistently offer unmappable pages. When they do it's usually the zero page. As people try this out, I expect that we'll want to allow different platforms to customize this, let's do so later. - Vectors of pointers are initialized the same way pointers are. - Floating point values and vectors are initialized with a negative quiet NaN with repeated 0xFF payload (e.g. 0x and 0x). NaNs are nice (here, anways) because they propagate on arithmetic, making it more likely that entire computations become NaN when a single uninitialized value sneaks in. - Arrays are initialized to their homogeneous elements' initialization value, repeated. Stack-based Variable-Length Arrays (VLAs) are runtime-initialized to the allocated size (no effort is made for negative size, but zero-sized VLAs are untouched even if technically undefined). - Structs are initialized to their heterogeneous element's initialization values. Zero-size structs are initialized as 0xAA since they're allocated a single byte. - Unions are initialized using the initialization for the largest member of the union. Expect the values used for pattern initialization to change over time, as we refine heuristics (both for performance and security). The goal is truly to avoid injecting semantics into undefined behavior, and we should be comfortable changing these values when there's a worthwhile point in doing so. Why so much infinite scream? Repeated byte patterns tend to be easy to synthesize on most architectures, and otherwise memset is usually very efficient. For values which aren't entirely repeated byte patterns, LLVM will often generate code which does memset + a few stores. 2. Zero initialization Zero initialize all values. This has the unfortunate side-effect of providing semantics t
r350644 - [NFC] Don't over-eagerly check block alignment
Author: jfb
Date: Tue Jan 8 10:51:38 2019
New Revision: 350644
URL: http://llvm.org/viewvc/llvm-project?rev=350644&view=rev
Log:
[NFC] Don't over-eagerly check block alignment
Alignment of __block isn't relevant to this test, remove its checking.
Modified:
cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
Modified: cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp?rev=350644&r1=350643&r2=350644&view=diff
==
--- cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/trivial-auto-var-init.cpp Tue Jan 8 10:51:38 2019
@@ -22,9 +22,9 @@ void test_selfinit() {
// UNINIT-LABEL: test_block(
// ZERO-LABEL:test_block(
-// ZERO: store i32 0, i32* %block, align 4
+// ZERO: store i32 0, i32* %block
// PATTERN-LABEL: test_block(
-// PATTERN: store i32 -1431655766, i32* %block, align 4
+// PATTERN: store i32 -1431655766, i32* %block
void test_block() {
__block int block;
used(block);
___
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r336840 - [NFC] typo
Author: jfb
Date: Wed Jul 11 12:51:40 2018
New Revision: 336840
URL: http://llvm.org/viewvc/llvm-project?rev=336840&view=rev
Log:
[NFC] typo
Modified:
cfe/trunk/lib/CodeGen/ConstantEmitter.h
Modified: cfe/trunk/lib/CodeGen/ConstantEmitter.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/ConstantEmitter.h?rev=336840&r1=336839&r2=336840&view=diff
==
--- cfe/trunk/lib/CodeGen/ConstantEmitter.h (original)
+++ cfe/trunk/lib/CodeGen/ConstantEmitter.h Wed Jul 11 12:51:40 2018
@@ -50,7 +50,7 @@ public:
: CGM(CGM), CGF(CGF) {}
/// Initialize this emission in the context of the given function.
- /// Use this if the expression might contain contextaul references like
+ /// Use this if the expression might contain contextual references like
/// block addresses or PredefinedExprs.
ConstantEmitter(CodeGenFunction &CGF)
: CGM(CGF.CGM), CGF(&CGF) {}
___
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r337041 - CodeGen: specify alignment + inbounds for automatic variable initialization
Author: jfb
Date: Fri Jul 13 13:33:23 2018
New Revision: 337041
URL: http://llvm.org/viewvc/llvm-project?rev=337041&view=rev
Log:
CodeGen: specify alignment + inbounds for automatic variable initialization
Summary: Automatic variable initialization was generating default-aligned
stores (which are deprecated) instead of using the known alignment from the
alloca. Further, they didn't specify inbounds.
Subscribers: dexonsmith, cfe-commits
Differential Revision: https://reviews.llvm.org/D49209
Modified:
cfe/trunk/lib/CodeGen/CGBuilder.h
cfe/trunk/lib/CodeGen/CGDecl.cpp
cfe/trunk/test/CodeGen/init.c
cfe/trunk/test/CodeGenOpenCL/partial_initializer.cl
Modified: cfe/trunk/lib/CodeGen/CGBuilder.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuilder.h?rev=337041&r1=337040&r2=337041&view=diff
==
--- cfe/trunk/lib/CodeGen/CGBuilder.h (original)
+++ cfe/trunk/lib/CodeGen/CGBuilder.h Fri Jul 13 13:33:23 2018
@@ -244,6 +244,21 @@ public:
Addr.getAlignment().alignmentAtOffset(Offset));
}
+ using CGBuilderBaseTy::CreateConstInBoundsGEP2_32;
+ Address CreateConstInBoundsGEP2_32(Address Addr, unsigned Idx0,
+ unsigned Idx1, const llvm::DataLayout
&DL,
+ const llvm::Twine &Name = "") {
+auto *GEP = cast(CreateConstInBoundsGEP2_32(
+Addr.getElementType(), Addr.getPointer(), Idx0, Idx1, Name));
+llvm::APInt Offset(
+DL.getIndexSizeInBits(Addr.getType()->getPointerAddressSpace()), 0,
+/*IsSigned=*/true);
+if (!GEP->accumulateConstantOffset(DL, Offset))
+ llvm_unreachable("offset of GEP with constants is always computable");
+return Address(GEP, Addr.getAlignment().alignmentAtOffset(
+CharUnits::fromQuantity(Offset.getSExtValue(;
+ }
+
llvm::Value *CreateConstInBoundsByteGEP(llvm::Value *Ptr, CharUnits Offset,
const llvm::Twine &Name = "") {
assert(Ptr->getType()->getPointerElementType() == TypeCache.Int8Ty);
Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=337041&r1=337040&r2=337041&view=diff
==
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Fri Jul 13 13:33:23 2018
@@ -888,15 +888,17 @@ static bool canEmitInitWithFewStoresAfte
/// emitStoresForInitAfterMemset - For inits that
/// canEmitInitWithFewStoresAfterMemset returned true for, emit the scalar
/// stores that would be required.
-static void emitStoresForInitAfterMemset(llvm::Constant *Init, llvm::Value
*Loc,
- bool isVolatile, CGBuilderTy
&Builder) {
+static void emitStoresForInitAfterMemset(CodeGenModule &CGM,
+ llvm::Constant *Init, Address Loc,
+ bool isVolatile,
+ CGBuilderTy &Builder) {
assert(!Init->isNullValue() && !isa(Init) &&
"called emitStoresForInitAfterMemset for zero or undef value.");
if (isa(Init) || isa(Init) ||
isa(Init) || isa(Init) ||
isa(Init)) {
-Builder.CreateDefaultAlignedStore(Init, Loc, isVolatile);
+Builder.CreateStore(Init, Loc, isVolatile);
return;
}
@@ -908,7 +910,8 @@ static void emitStoresForInitAfterMemset
// If necessary, get a pointer to the element and emit it.
if (!Elt->isNullValue() && !isa(Elt))
emitStoresForInitAfterMemset(
-Elt, Builder.CreateConstGEP2_32(Init->getType(), Loc, 0, i),
+CGM, Elt,
+Builder.CreateConstInBoundsGEP2_32(Loc, 0, i, CGM.getDataLayout()),
isVolatile, Builder);
}
return;
@@ -923,7 +926,8 @@ static void emitStoresForInitAfterMemset
// If necessary, get a pointer to the element and emit it.
if (!Elt->isNullValue() && !isa(Elt))
emitStoresForInitAfterMemset(
- Elt, Builder.CreateConstGEP2_32(Init->getType(), Loc, 0, i),
+ CGM, Elt,
+ Builder.CreateConstInBoundsGEP2_32(Loc, 0, i, CGM.getDataLayout()),
isVolatile, Builder);
}
}
@@ -1411,8 +1415,7 @@ void CodeGenFunction::EmitAutoVarInit(co
if (!constant->isNullValue() && !isa(constant)) {
Loc = Builder.CreateBitCast(Loc,
constant->getType()->getPointerTo(Loc.getAddressSpace()));
- emitStoresForInitAfterMemset(constant, Loc.getPointer(),
- isVolatile, Builder);
+ emitStoresForInitAfterMemset(CGM, constant, Loc, isVolatile, Builder);
}
} else {
// Otherwise, create a temporary global with the initializer then
Modified: cfe/trunk/test/CodeGen/init.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Code
r337410 - Support implicit _Atomic struct load / store
Author: jfb
Date: Wed Jul 18 11:01:41 2018
New Revision: 337410
URL: http://llvm.org/viewvc/llvm-project?rev=337410&view=rev
Log:
Support implicit _Atomic struct load / store
Summary:
Using _Atomic to do implicit load / store is just a seq_cst atomic_load /
atomic_store. Stores currently assert in Sema::ImpCastExprToType with 'can't
implicitly cast lvalue to rvalue with this cast kind', but that's erroneous.
The codegen is fine as the test shows.
While investigating I found that Richard had found the problem here:
https://reviews.llvm.org/D46112#1113557
Reviewers: dexonsmith
Subscribers: cfe-commits, efriedma, rsmith, aaron.ballman
Differential Revision: https://reviews.llvm.org/D49458
Modified:
cfe/trunk/lib/Sema/Sema.cpp
cfe/trunk/test/CodeGen/atomic-ops.c
Modified: cfe/trunk/lib/Sema/Sema.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/Sema.cpp?rev=337410&r1=337409&r2=337410&view=diff
==
--- cfe/trunk/lib/Sema/Sema.cpp (original)
+++ cfe/trunk/lib/Sema/Sema.cpp Wed Jul 18 11:01:41 2018
@@ -481,6 +481,7 @@ ExprResult Sema::ImpCastExprToType(Expr
case CK_ArrayToPointerDecay:
case CK_FunctionToPointerDecay:
case CK_ToVoid:
+case CK_NonAtomicToAtomic:
break;
}
}
Modified: cfe/trunk/test/CodeGen/atomic-ops.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/atomic-ops.c?rev=337410&r1=337409&r2=337410&view=diff
==
--- cfe/trunk/test/CodeGen/atomic-ops.c (original)
+++ cfe/trunk/test/CodeGen/atomic-ops.c Wed Jul 18 11:01:41 2018
@@ -183,6 +183,18 @@ struct S {
double x;
};
+void implicit_store(_Atomic(struct S) *a, struct S s) {
+ // CHECK-LABEL: @implicit_store(
+ // CHECK: store atomic i64 %{{.*}}, i64* %{{.*}} seq_cst, align 8
+ *a = s;
+}
+
+struct S implicit_load(_Atomic(struct S) *a) {
+ // CHECK-LABEL: @implicit_load(
+ // CHECK: load atomic i64, i64* %{{.*}} seq_cst, align 8
+ return *a;
+}
+
struct S fd1(struct S *a) {
// CHECK-LABEL: @fd1
// CHECK: [[RETVAL:%.*]] = alloca %struct.S, align 4
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[clang] 389f009 - [NFC] Sema: use checkArgCount instead of custom checking
Author: JF Bastien
Date: 2020-07-28T13:41:06-07:00
New Revision: 389f009c5757cf09c0b2d77a15b3b541fb0f2a1c
URL:
https://github.com/llvm/llvm-project/commit/389f009c5757cf09c0b2d77a15b3b541fb0f2a1c
DIFF:
https://github.com/llvm/llvm-project/commit/389f009c5757cf09c0b2d77a15b3b541fb0f2a1c.diff
LOG: [NFC] Sema: use checkArgCount instead of custom checking
As requested in D79279.
Differential Revision: https://reviews.llvm.org/D84666
Added:
Modified:
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/lib/Sema/SemaChecking.cpp
clang/test/CodeGen/builtins-ppc-error.c
clang/test/SemaOpenCL/to_addr_builtin.cl
Removed:
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td
b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index adfd4c207da8..8093e7ed3fbe 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -9724,8 +9724,6 @@ def err_opencl_block_ref_block : Error<
"cannot refer to a block inside block">;
// OpenCL v2.0 s6.13.9 - Address space qualifier functions.
-def err_opencl_builtin_to_addr_arg_num : Error<
- "invalid number of arguments to function: %0">;
def err_opencl_builtin_to_addr_invalid_arg : Error<
"invalid argument %0 to function: %1, expecting a generic pointer argument">;
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 77d5f3ff816e..ccdb277dda1a 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -1274,11 +1274,8 @@ static bool SemaBuiltinPipePackets(Sema &S, CallExpr
*Call) {
// \return True if a semantic error has been found, false otherwise.
static bool SemaOpenCLBuiltinToAddr(Sema &S, unsigned BuiltinID,
CallExpr *Call) {
- if (Call->getNumArgs() != 1) {
-S.Diag(Call->getBeginLoc(), diag::err_opencl_builtin_to_addr_arg_num)
-<< Call->getDirectCallee() << Call->getSourceRange();
+ if (checkArgCount(S, Call, 1))
return true;
- }
auto RT = Call->getArg(0)->getType();
if (!RT->isPointerType() || RT->getPointeeType()
@@ -5572,21 +5569,8 @@ bool Sema::SemaBuiltinVAStart(unsigned BuiltinID,
CallExpr *TheCall) {
if (checkVAStartABI(*this, BuiltinID, Fn))
return true;
- if (TheCall->getNumArgs() > 2) {
-Diag(TheCall->getArg(2)->getBeginLoc(),
- diag::err_typecheck_call_too_many_args)
-<< 0 /*function call*/ << 2 << TheCall->getNumArgs()
-<< Fn->getSourceRange()
-<< SourceRange(TheCall->getArg(2)->getBeginLoc(),
- (*(TheCall->arg_end() - 1))->getEndLoc());
+ if (checkArgCount(*this, TheCall, 2))
return true;
- }
-
- if (TheCall->getNumArgs() < 2) {
-return Diag(TheCall->getEndLoc(),
-diag::err_typecheck_call_too_few_args_at_least)
- << 0 /*function call*/ << 2 << TheCall->getNumArgs();
- }
// Type-check the first argument normally.
if (checkBuiltinArgument(*this, TheCall, 0))
@@ -5696,15 +5680,8 @@ bool Sema::SemaBuiltinVAStartARMMicrosoft(CallExpr
*Call) {
/// SemaBuiltinUnorderedCompare - Handle functions like __builtin_isgreater and
/// friends. This is declared to take (...), so we have to check everything.
bool Sema::SemaBuiltinUnorderedCompare(CallExpr *TheCall) {
- if (TheCall->getNumArgs() < 2)
-return Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
- << 0 << 2 << TheCall->getNumArgs() /*function call*/;
- if (TheCall->getNumArgs() > 2)
-return Diag(TheCall->getArg(2)->getBeginLoc(),
-diag::err_typecheck_call_too_many_args)
- << 0 /*function call*/ << 2 << TheCall->getNumArgs()
- << SourceRange(TheCall->getArg(2)->getBeginLoc(),
- (*(TheCall->arg_end() - 1))->getEndLoc());
+ if (checkArgCount(*this, TheCall, 2))
+return true;
ExprResult OrigArg0 = TheCall->getArg(0);
ExprResult OrigArg1 = TheCall->getArg(1);
@@ -5742,15 +5719,8 @@ bool Sema::SemaBuiltinUnorderedCompare(CallExpr
*TheCall) {
/// to check everything. We expect the last argument to be a floating point
/// value.
bool Sema::SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs) {
- if (TheCall->getNumArgs() < NumArgs)
-return Diag(TheCall->getEndLoc(), diag::err_typecheck_call_too_few_args)
- << 0 << NumArgs << TheCall->getNumArgs() /*function call*/;
- if (TheCall->getNumArgs() > NumArgs)
-return Diag(TheCall->getArg(NumArgs)->getBeginLoc(),
-diag::err_typecheck_call_too_many_args)
- << 0 /*function call*/ << NumArgs << TheCall->getNumArgs()
- << SourceRange(TheCall->getArg(NumArgs)->getBeginLoc(),
- (*(TheCall->arg_end() - 1))->getEndLoc());
+ if (checkArgCount(*this, TheCall, NumArgs))
+return true;
// __builtin_fpclassify is the only case where NumA
[clang] 00c9a50 - CrashTracer: clang at clang: llvm::BitstreamWriter::ExitBlock
Author: Oliver Hunt
Date: 2020-07-09T20:27:33-07:00
New Revision: 00c9a504aeed2603bd8bc9b89d753534e929c8e8
URL:
https://github.com/llvm/llvm-project/commit/00c9a504aeed2603bd8bc9b89d753534e929c8e8
DIFF:
https://github.com/llvm/llvm-project/commit/00c9a504aeed2603bd8bc9b89d753534e929c8e8.diff
LOG: CrashTracer: clang at clang: llvm::BitstreamWriter::ExitBlock
Add a guard for re-entering an SDiagsWriter's HandleDiagnostics
method after we've started finalizing. This is a generic catch
all for unexpected fatal errors so we don't recursive crash inside
the generic llvm error handler.
We also add logic to handle the actual error case in
llvm::~raw_fd_ostream caused by failing to clear errors before
it is destroyed.
Added:
Modified:
clang/include/clang/Basic/DiagnosticFrontendKinds.td
clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
Removed:
diff --git a/clang/include/clang/Basic/DiagnosticFrontendKinds.td
b/clang/include/clang/Basic/DiagnosticFrontendKinds.td
index 83c13e0dbbe0..ceb24bce5978 100644
--- a/clang/include/clang/Basic/DiagnosticFrontendKinds.td
+++ b/clang/include/clang/Basic/DiagnosticFrontendKinds.td
@@ -119,6 +119,9 @@ def warn_fe_serialized_diag_merge_failure : Warning<
def warn_fe_serialized_diag_failure : Warning<
"unable to open file %0 for serializing diagnostics (%1)">,
InGroup;
+def warn_fe_serialized_diag_failure_during_finalisation : Warning<
+"Received warning after diagnostic serialization teardown was underway:
%0">,
+InGroup;
def err_verify_missing_line : Error<
"missing or invalid line number following '@' in expected %0">;
diff --git a/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
b/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
index e3ca8fdec393..462aeda6e027 100644
--- a/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
+++ b/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
@@ -239,6 +239,9 @@ class SDiagsWriter : public DiagnosticConsumer {
/// generated from child processes.
bool MergeChildRecords;
+ /// Whether we've started finishing and tearing down this instance.
+ bool IsFinishing = false;
+
/// State that is shared among the various clones of this diagnostic
/// consumer.
struct SharedState {
@@ -568,6 +571,17 @@ unsigned SDiagsWriter::getEmitDiagnosticFlag(StringRef
FlagName) {
void SDiagsWriter::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
const Diagnostic &Info) {
+ assert(!IsFinishing &&
+ "Received a diagnostic after we've already started teardown.");
+ if (IsFinishing) {
+SmallString<256> diagnostic;
+Info.FormatDiagnostic(diagnostic);
+getMetaDiags()->Report(
+diag::warn_fe_serialized_diag_failure_during_finalisation)
+<< diagnostic;
+return;
+ }
+
// Enter the block for a non-note diagnostic immediately, rather than waiting
// for beginDiagnostic, in case associated notes are emitted before we get
// there.
@@ -761,6 +775,9 @@ void SDiagsWriter::RemoveOldDiagnostics() {
}
void SDiagsWriter::finish() {
+ assert(!IsFinishing);
+ IsFinishing = true;
+
// The original instance is responsible for writing the file.
if (!OriginalInstance)
return;
@@ -786,12 +803,20 @@ void SDiagsWriter::finish() {
if (EC) {
getMetaDiags()->Report(diag::warn_fe_serialized_diag_failure)
<< State->OutputFile << EC.message();
+OS->clear_error();
return;
}
// Write the generated bitstream to "Out".
OS->write((char *)&State->Buffer.front(), State->Buffer.size());
OS->flush();
+
+ assert(!OS->has_error());
+ if (OS->has_error()) {
+getMetaDiags()->Report(diag::warn_fe_serialized_diag_failure)
+<< State->OutputFile << OS->error().message();
+OS->clear_error();
+ }
}
std::error_code SDiagsMerger::visitStartOfDiagnostic() {
___
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[clang] 13fdcd3 - [NFC] Builtins: list 'R' for restrict
Author: JF Bastien Date: 2020-06-26T12:58:17-07:00 New Revision: 13fdcd37b325f62ff2513c59807de9ad0a9d2a51 URL: https://github.com/llvm/llvm-project/commit/13fdcd37b325f62ff2513c59807de9ad0a9d2a51 DIFF: https://github.com/llvm/llvm-project/commit/13fdcd37b325f62ff2513c59807de9ad0a9d2a51.diff LOG: [NFC] Builtins: list 'R' for restrict It was added to the list of builtin modifiers in r148573 back in 2012-01-20, but the comment wasn't updated. Added: Modified: clang/include/clang/Basic/Builtins.def Removed: diff --git a/clang/include/clang/Basic/Builtins.def b/clang/include/clang/Basic/Builtins.def index c060d49ba338..1416a64543a4 100644 --- a/clang/include/clang/Basic/Builtins.def +++ b/clang/include/clang/Basic/Builtins.def @@ -65,6 +65,7 @@ // & -> reference (optionally followed by an address space number) // C -> const // D -> volatile +// R -> restrict // The third value provided to the macro specifies information about attributes // of the function. These must be kept in sync with the predicates in the ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[clang] b10bd6d - [NFC] Bump ObjCOrBuiltinIDBits to 15
Author: JF Bastien
Date: 2020-06-26T13:48:51-07:00
New Revision: b10bd6dfc62161671892b2dd3be5152754d14995
URL:
https://github.com/llvm/llvm-project/commit/b10bd6dfc62161671892b2dd3be5152754d14995
DIFF:
https://github.com/llvm/llvm-project/commit/b10bd6dfc62161671892b2dd3be5152754d14995.diff
LOG: [NFC] Bump ObjCOrBuiltinIDBits to 15
We're now hitting this because we're at the limit for number of builtins:
clang/lib/Basic/IdentifierTable.cpp:39:1: error: static_assert failed due to
requirement '2 * LargestBuiltinID < (2 << (ObjCOrBuiltinIDBits - 1))'
"Insufficient ObjCOrBuiltinID Bits"
static_assert(2 * LargestBuiltinID < (2 << (ObjCOrBuiltinIDBits - 1)),
^ ~~~
Bump it to 15 so whoever adds a builtin next (as I am, or as anyone else might)
doesn't merge conflict over each other.
Added:
Modified:
clang/include/clang/Basic/IdentifierTable.h
Removed:
diff --git a/clang/include/clang/Basic/IdentifierTable.h
b/clang/include/clang/Basic/IdentifierTable.h
index 31849bbdd545..fc554a35e721 100644
--- a/clang/include/clang/Basic/IdentifierTable.h
+++ b/clang/include/clang/Basic/IdentifierTable.h
@@ -48,7 +48,7 @@ using IdentifierLocPair = std::pair;
/// of a pointer to one of these classes.
enum { IdentifierInfoAlignment = 8 };
-static constexpr int ObjCOrBuiltinIDBits = 14;
+static constexpr int ObjCOrBuiltinIDBits = 15;
/// One of these records is kept for each identifier that
/// is lexed. This contains information about whether the token was
\#define'd,
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[clang] e18c6ef - [clang] improve diagnostics for misaligned and large atomics
Author: Thorsten Schuett
Date: 2020-08-04T11:10:29-07:00
New Revision: e18c6ef6b41a59af73bf5c3d7d52a8c53a471e5d
URL:
https://github.com/llvm/llvm-project/commit/e18c6ef6b41a59af73bf5c3d7d52a8c53a471e5d
DIFF:
https://github.com/llvm/llvm-project/commit/e18c6ef6b41a59af73bf5c3d7d52a8c53a471e5d.diff
LOG: [clang] improve diagnostics for misaligned and large atomics
"Listing the alignment and access size (== expected alignment) in the warning
seems like a good idea."
solves PR 46947
struct Foo {
struct Bar {
void * a;
void * b;
};
Bar bar;
};
struct ThirtyTwo {
struct Large {
void * a;
void * b;
void * c;
void * d;
};
Large bar;
};
void braz(Foo *foo, ThirtyTwo *braz) {
Foo::Bar bar;
__atomic_load(&foo->bar, &bar, __ATOMIC_RELAXED);
ThirtyTwo::Large foobar;
__atomic_load(&braz->bar, &foobar, __ATOMIC_RELAXED);
}
repro.cpp:21:3: warning: misaligned atomic operation may incur significant
performance penalty; the expected (16 bytes) exceeds the actual alignment (8
bytes) [-Watomic-alignment]
__atomic_load(&foo->bar, &bar, __ATOMIC_RELAXED);
^
repro.cpp:24:3: warning: misaligned atomic operation may incur significant
performance penalty; the expected (32 bytes) exceeds the actual alignment (8
bytes) [-Watomic-alignment]
__atomic_load(&braz->bar, &foobar, __ATOMIC_RELAXED);
^
repro.cpp:24:3: warning: large atomic operation may incur significant
performance penalty; the access size (32 bytes) exceeds the max lock-free size
(16 bytes) [-Watomic-alignment]
3 warnings generated.
Differential Revision: https://reviews.llvm.org/D85102
Added:
Modified:
clang/include/clang/Basic/DiagnosticFrontendKinds.td
clang/include/clang/Basic/DiagnosticGroups.td
clang/lib/CodeGen/CGAtomic.cpp
clang/test/CodeGen/atomics-sema-alignment.c
Removed:
diff --git a/clang/include/clang/Basic/DiagnosticFrontendKinds.td
b/clang/include/clang/Basic/DiagnosticFrontendKinds.td
index b202d2abffa0..6434d92fd8fc 100644
--- a/clang/include/clang/Basic/DiagnosticFrontendKinds.td
+++ b/clang/include/clang/Basic/DiagnosticFrontendKinds.td
@@ -270,8 +270,16 @@ def err_ifunc_resolver_return : Error<
"ifunc resolver function must return a pointer">;
def warn_atomic_op_misaligned : Warning<
- "%select{large|misaligned}0 atomic operation may incur "
- "significant performance penalty">, InGroup>;
+ "misaligned atomic operation may incur "
+ "significant performance penalty"
+ "; the expected alignment (%0 bytes) exceeds the actual alignment (%1
bytes)">,
+ InGroup;
+
+def warn_atomic_op_oversized : Warning<
+ "large atomic operation may incur "
+ "significant performance penalty"
+ "; the access size (%0 bytes) exceeds the max lock-free size (%1 bytes)">,
+InGroup;
def warn_alias_with_section : Warning<
"%select{alias|ifunc}1 will not be in section '%0' but in the same section "
diff --git a/clang/include/clang/Basic/DiagnosticGroups.td
b/clang/include/clang/Basic/DiagnosticGroups.td
index 1e829be4028e..be62461faef4 100644
--- a/clang/include/clang/Basic/DiagnosticGroups.td
+++ b/clang/include/clang/Basic/DiagnosticGroups.td
@@ -699,6 +699,7 @@ def ReorderInitList : DiagGroup<"reorder-init-list">;
def Reorder : DiagGroup<"reorder", [ReorderCtor, ReorderInitList]>;
def UndeclaredSelector : DiagGroup<"undeclared-selector">;
def ImplicitAtomic : DiagGroup<"implicit-atomic-properties">;
+def AtomicAlignment : DiagGroup<"atomic-alignment">;
def CustomAtomic : DiagGroup<"custom-atomic-properties">;
def AtomicProperties : DiagGroup<"atomic-properties",
[ImplicitAtomic, CustomAtomic]>;
diff --git a/clang/lib/CodeGen/CGAtomic.cpp b/clang/lib/CodeGen/CGAtomic.cpp
index a58450ddd4c5..b7ada4ac7e3b 100644
--- a/clang/lib/CodeGen/CGAtomic.cpp
+++ b/clang/lib/CodeGen/CGAtomic.cpp
@@ -807,10 +807,20 @@ RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E) {
bool Oversized = getContext().toBits(sizeChars) > MaxInlineWidthInBits;
bool Misaligned = (Ptr.getAlignment() % sizeChars) != 0;
bool UseLibcall = Misaligned | Oversized;
+ CharUnits MaxInlineWidth =
+ getContext().toCharUnitsFromBits(MaxInlineWidthInBits);
- if (UseLibcall) {
-CGM.getDiags().Report(E->getBeginLoc(), diag::warn_atomic_op_misaligned)
-<< !Oversized;
+ DiagnosticsEngine &Diags = CGM.getDiags();
+
+ if (Misaligned) {
+Diags.Report(E->getBeginLoc(), diag::warn_atomic_op_misaligned)
+<< (int)sizeChars.getQuantity()
+<< (int)Ptr.getAlignment().getQuantity();
+ }
+
+ if (Oversized) {
+Diags.Report(E->getBeginLoc(), diag::warn_atomic_op_oversized)
+<< (int)sizeChars.getQuantity() << (int)MaxInlineWidth.getQuantity();
}
llvm::Value *Order = EmitScalarExpr(E->getOrder());
diff --git a/clang/test/CodeGen/atomics-sema-alignment.c
b/clang/test/CodeGe
Re: [PATCH] D155580: [trivial-auto-var-init] Do not emit initialization code for empty class
On Tue, Jul 18, 2023 at 8:41 PM serge via Phabricator <
revi...@reviews.llvm.org> wrote:
> serge-sans-paille created this revision.
> serge-sans-paille added reviewers: nickdesaulniers, jfb, aaron.ballman.
> Herald added a subscriber: kristof.beyls.
> Herald added a project: All.
> serge-sans-paille requested review of this revision.
> Herald added a project: clang.
> Herald added a subscriber: cfe-commits.
>
> Empty class still use one byte, but there is no way to read that byte
> programmatically in a legitimate way. Yet trivial auto var init always
> generate a store for it and there is no programmatic way to prevent the
> generation of that extra store.
This is the same as padding, and is initialized on purpose. If it’s truly
unused then the optimizer will eliminate it… unless it can’t prove whether
the store is dead.
Does this show up in any meaningless performance case? If so, can we
optimize it away?
This patch harmonizes Clang behavior with GCC and does not generate
> initialization code for empty classes under -ftrivial-auto-var-init
>
>
> Repository:
> rG LLVM Github Monorepo
>
> https://reviews.llvm.org/D155580
>
> Files:
> clang/lib/CodeGen/CGDecl.cpp
> clang/test/CodeGenCXX/auto-var-init-empty-class.cpp
> clang/test/CodeGenCXX/auto-var-init.cpp
>
>
> Index: clang/test/CodeGenCXX/auto-var-init.cpp
> ===
> --- clang/test/CodeGenCXX/auto-var-init.cpp
> +++ clang/test/CodeGenCXX/auto-var-init.cpp
> @@ -43,9 +43,6 @@
> // PATTERN-NOT: undef
> // ZERO-NOT: undef
>
> -// PATTERN-O0: @__const.test_empty_uninit.uninit = private unnamed_addr
> constant %struct.empty { i8 [[I8]] }, align 1
> -// PATTERN-O1-NOT: @__const.test_empty_uninit.uninit
> -struct empty {};
> // PATTERN-O0: @__const.test_small_uninit.uninit = private unnamed_addr
> constant %struct.small { i8 [[I8]] }, align 1
> // PATTERN-O0: @__const.test_small_custom.custom = private unnamed_addr
> constant %struct.small { i8 42 }, align 1
> // ZERO-O0: @__const.test_small_custom.custom = private unnamed_addr
> constant %struct.small { i8 42 }, align 1
> @@ -586,24 +583,6 @@
> // CHECK-NOT: !annotation
> // CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
>
> -TEST_UNINIT(empty, empty);
> -// CHECK-LABEL: @test_empty_uninit()
> -// CHECK: %uninit = alloca %struct.empty, align
> -// CHECK-NEXT: call void @{{.*}}used{{.*}}%uninit)
> -// PATTERN-LABEL: @test_empty_uninit()
> -// PATTERN-O0: call void @llvm.memcpy{{.*}}
> @__const.test_empty_uninit.uninit{{.+}}),
> !annotation [[AUTO_INIT]]
> -// PATTERN-O1: store i8 [[I8]], {{.*}} align 1, !annotation [[AUTO_INIT]]
> -// ZERO-LABEL: @test_empty_uninit()
> -// ZERO-O0: call void @llvm.memset{{.*}}, i8 0,{{.+}}), !annotation
> [[AUTO_INIT]]
> -// ZERO-O1: store i8 0, {{.*}} align 1, !annotation [[AUTO_INIT]]
> -
> -TEST_BRACES(empty, empty);
> -// CHECK-LABEL: @test_empty_braces()
> -// CHECK: %braces = alloca %struct.empty, align
> -// CHECK-NEXT: call void @llvm.memcpy
> -// CHECK-NOT: !annotation
> -// CHECK-NEXT: call void @{{.*}}used{{.*}}%braces)
> -
> TEST_UNINIT(small, small);
> // CHECK-LABEL: @test_small_uninit()
> // CHECK: %uninit = alloca %struct.small, align
> Index: clang/test/CodeGenCXX/auto-var-init-empty-class.cpp
> ===
> --- /dev/null
> +++ clang/test/CodeGenCXX/auto-var-init-empty-class.cpp
> @@ -0,0 +1,18 @@
> +// RUN: %clang_cc1 -triple x86_64-unknown-unknown
> -ftrivial-auto-var-init=pattern %s -emit-llvm -o - | FileCheck %s
> +// RUN: %clang_cc1 -triple x86_64-unknown-unknown
> -ftrivial-auto-var-init=zero %s -emit-llvm -o - | FileCheck %s
> +
> +// C++ empty classes still take some memory, but there is no need to
> initialize
> +// it has it cannot be accessed. This matches GCC behavior.
> +
> +struct S {
> +};
> +
> +extern "C" void use(struct S*);
> +
> +// CHECK-LABEL: @empty_class(
> +// CHECK: %s = alloca
> +// CHECK-NEXT: call void @use(ptr noundef %s)
> +extern "C" void empty_class(void) {
> + S s;
> + return use(&s);
> +}
> Index: clang/lib/CodeGen/CGDecl.cpp
> ===
> --- clang/lib/CodeGen/CGDecl.cpp
> +++ clang/lib/CodeGen/CGDecl.cpp
> @@ -1855,6 +1855,13 @@
>}
> }
>
> +static bool isEmptyClass(VarDecl const &D) {
> + const Type *Ty = D.getType().getTypePtr();
> + if (const auto *CxxRecordTy = Ty->getAsCXXRecordDecl())
> +return CxxRecordTy->isEmpty();
> + return false;
> +}
> +
> void CodeGenFunction::EmitAutoVarInit(const AutoVarEmission &emission) {
>assert(emission.Variable && "emission was not valid!");
>
> @@ -1903,12 +1910,18 @@
>locIsByrefHeader ? emission.getObjectAddress(*this) :
> emission.Addr;
>
>// Note: constexpr already initializes everything correctly.
> + // Note: empty classes still use a byte, but it's ok not to initialize
> it as
> + // it cannot be legitimately acces
Re: [PATCH] D12861: [WebAssembly] Use "long long" for int_fast64_t and int_least64_t on wasm64
jfb accepted this revision. jfb added a comment. This revision is now accepted and ready to land. lgtm Repository: rL LLVM http://reviews.llvm.org/D12861 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D12862: [WebAssembly] Define the atomic type sizes
jfb accepted this revision. jfb added a comment. This revision is now accepted and ready to land. lgtm Repository: rL LLVM http://reviews.llvm.org/D12862 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D12002: Initial WebAssembly support in clang
jfb added a subscriber: rengolin.
Comment at: include/clang/Basic/TargetCXXABI.h:166
@@ +165,3 @@
+case GenericMIPS:
+ // TODO: ARM-style pointers to member functions put the discriminator in
+ // the this adjustment, so they don't require functions to have any
@rengolin: FYI.
Comment at: lib/Basic/Targets.cpp:6935
@@ +6934,3 @@
+NoAsmVariants = true;
+LongDoubleWidth = LongDoubleAlign = 64;
+SuitableAlign = 128;
That's already the default?
Comment at: lib/Basic/Targets.cpp:6937
@@ +6936,3 @@
+SuitableAlign = 128;
+RegParmMax = 0; // Disallow regparm
+ }
Already the default?
Comment at: lib/Basic/Targets.cpp:6938
@@ +6937,3 @@
+RegParmMax = 0; // Disallow regparm
+ }
+
`TLSSupported = false` for now.
Comment at: lib/Basic/Targets.cpp:6941
@@ +6940,3 @@
+ void
+ getDefaultFeatures(llvm::StringMap &Features) const override final {}
+ bool setCPU(const std::string &Name) override final {
Not needed, since that's the default impl?
Comment at: lib/Basic/Targets.cpp:6956
@@ +6955,3 @@
+
+Builder.defineMacro("__REGISTER_PREFIX__", "");
+ }
I'm not sure we need this. Does it just make porting easier?
Comment at: lib/Basic/Targets.cpp:6983
@@ +6982,3 @@
+ const char *getClobbers() const override { return ""; }
+ bool isCLZForZeroUndef() const override { return false; }
+};
`final` for these two.
Comment at: lib/Basic/Targets.cpp:6994
@@ +6993,3 @@
+
+class WebAssembly32TargetInfo : public WebAssemblyTargetInfo {
+public:
`final`
Comment at: lib/Basic/Targets.cpp:7015
@@ +7014,3 @@
+
+class WebAssembly64TargetInfo : public WebAssemblyTargetInfo {
+public:
`final`
Comment at: lib/Driver/Tools.cpp:1559
@@ -1558,1 +1558,3 @@
+/// getWebAssemblyTargetCPU - Get the (LLVM) name of the WebAssembly cpu we are
+/// targeting.
New comment style without `name -`.
Comment at: test/CodeGen/wasm-arguments.c:91
@@ +90,2 @@
+// WEBASSEMBLY64: define void @f10(%struct.bitfield1* byval align 4 %bf1)
+void f10(bitfield1 bf1) {}
TODO for vararg test?
Comment at: test/Driver/wasm32-unknown-unknown.cpp:51
@@ +50,3 @@
+void __wasm__defined() {}
+#endif
+
Also test `__wasm32__` (and 64 in the other file).
Comment at: test/Driver/wasm32-unknown-unknown.cpp:64
@@ +63,3 @@
+void _REENTRANTundefined() {}
+#endif
+
Test `__REGISTER_PREFIX__` if we do keep it.
Comment at: test/Preprocessor/init.c:8478
@@ +8477,3 @@
+// WEBASSEMBLY32:#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
+// WEBASSEMBLY32:#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
+// WEBASSEMBLY32:#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
`ATOMIC_*_LOCK_FREE` should always be `1` for "maybe".
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Re: [PATCH] D12002: Initial WebAssembly support in clang
jfb added inline comments. Comment at: lib/Basic/Targets.cpp:6938 @@ +6937,3 @@ +BigEndian = false; +NoAsmVariants = true; +SuitableAlign = 128; True, leaving it as is sgtm. Comment at: lib/Basic/Targets.cpp:6994 @@ +6993,3 @@ +#include "clang/Basic/BuiltinsWebAssembly.def" +}; + Weird, the comment moved around. I put it on `WebAssembly32TargetInfo` which doesn't seem subclassed? Same for 64. Or is that going to be on the LLVM side? `final` on `getTargetDefines` instead? Comment at: test/Preprocessor/init.c:8478 @@ +8477,3 @@ +// WEBASSEMBLY32:#define __GCC_ATOMIC_LONG_LOCK_FREE 2 +// WEBASSEMBLY32:#define __GCC_ATOMIC_POINTER_LOCK_FREE 2 +// WEBASSEMBLY32:#define __GCC_ATOMIC_SHORT_LOCK_FREE 2 Yes, we don't know yet whether we guarantee atomicity so returning "maybe" is the conservative thing (which we can change in the future). We can discuss what we guarantee on the spec side, but for now the conservative thing is better IMO (and changing it isn't a problem, whereas changing "always" is a problem). FWIW [N4509](http://wg21.link/n4509) is relevant. Repository: rL LLVM http://reviews.llvm.org/D12002 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D12002: Initial WebAssembly support in clang
jfb accepted this revision.
jfb added a comment.
This revision is now accepted and ready to land.
lgtm
Comment at: lib/Basic/Targets.cpp:7002
@@ +7001,3 @@
+ bool isCLZForZeroUndef() const override final { return false; }
+ bool hasInt128Type() const override final { return true; }
+};
Does int 128 get expanded in legalization? Seems good.
Comment at: test/Preprocessor/init.c:8478
@@ +8477,3 @@
+// WEBASSEMBLY32:#define __GCC_ATOMIC_LONG_LOCK_FREE 1{{$}}
+// WEBASSEMBLY32:#define __GCC_ATOMIC_POINTER_LOCK_FREE 1{{$}}
+// WEBASSEMBLY32:#define __GCC_ATOMIC_SHORT_LOCK_FREE 1{{$}}
sunfish wrote:
> Ok, I've set MaxAtomicInlineWidth to 0 for now so that we don't block the
> rest of the patch on this issue.
>
> N4509 is just about exposing the same information via a different interface.
`constexpr` makes a world of difference I'm told :-)
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Re: [PATCH] D12002: Initial WebAssembly support in clang
jfb added a comment.
Still lgtm, with minor comments.
Comment at: lib/CodeGen/ItaniumCXXABI.cpp:364
@@ +363,3 @@
+ItaniumCXXABI(CGM, /* UseARMMethodPtrABI = */ true,
+ /* UseARMGuardVarABI = */ true) {}
+
It's more common to have no spaces for these comments:
`/*UseARMMethodPtrABI=*/true,`.
Comment at: lib/Driver/Tools.cpp:1567
@@ +1566,3 @@
+
+#ifdef __wasm__
+// Handle "native" by examining the host.
Could you expand a bit on why "native" doesn't make sense if LLVM itself wasn't
compiled for wasm?
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Re: [PATCH] D22557: [libcxx] Diagnose invalid memory order arguments in . Fixes PR21179.
jfb added a subscriber: jfb.
jfb added a comment.
Awesome, thanks for doing this!
Should this be a warning or an error?
Comment at: include/atomic:581
@@ +580,3 @@
+ || __f == memory_order_acq_rel, ""))) \
+__attribute__ ((__unavailable__("memory order argument to atomic operation
is invalid")))
+#endif
This isn't checking for the following requirement from the standard:
> The failure argument shall be no stronger than the success argument.
I think that's OK because I intend to remove that requirement from C++ :)
Should we nonetheless enforce the requirement until the standard drops it? If
so, "stronger" isn't well defined by the standard, details here:
https://github.com/jfbastien/papers/blob/master/source/D0418r1.bs
Comment at: test/libcxx/atomics/diagnose_invalid_memory_order.fail.cpp:30
@@ +29,3 @@
+vx.load(std::memory_order_release); // expected-error {{operation is
invalid}}
+vx.load(std::memory_order_acq_rel); // expected-error {{operation is
invalid}}
+}
Could you test that the other memory orders don't have any diagnostic (here and
below).
Comment at: test/libcxx/atomics/diagnose_invalid_memory_order.fail.cpp:55
@@ +54,3 @@
+}
+// compare exchange weak
+{
For cmpxchg (weak and strong), should you also test the version with only a
`success` ordering? The `failure` one is auto-generated from `success`, but it
would be good to know that it never generates a diagnostic.
https://reviews.llvm.org/D22557
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Re: [PATCH] D22557: [libcxx] Diagnose invalid memory order arguments in . Fixes PR21179.
jfb added inline comments.
Comment at: include/atomic:569
@@ +568,3 @@
+__attribute__ ((__enable_if__(__m == memory_order_release \
+ || __m == memory_order_acq_rel, ""))) \
+__attribute__ ((__unavailable__("memory order argument to atomic operation
is invalid")))
bcraig wrote:
> what about relaxed?
Load relaxed is valid.
https://reviews.llvm.org/D22557
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Re: [PATCH] D22557: [libcxx] Diagnose invalid memory order arguments in . Fixes PR21179.
jfb added a comment.
Two comments, then lgtm.
Comment at: include/atomic:581
@@ +580,3 @@
+ || __f == memory_order_acq_rel, ""))) \
+__attribute__ ((__unavailable__("memory order argument to atomic operation
is invalid")))
+#endif
OK that's totally fine with me. Could you put this in a comment? Something like
"not checking the 'stronger' requirement, see wg21.link/p0418" (it'll be
published in the pre-Issaquah meeting, URL will work then).
Comment at: test/libcxx/atomics/diagnose_invalid_memory_order.fail.cpp:86
@@ +85,3 @@
+// does not generate any diagnostics.
+x.compare_exchange_weak(val1, val2, std::memory_order_release);
+}
Could you do the other 5 (same below).
https://reviews.llvm.org/D22557
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[libcxx] r276309 - Remove FIXME for feature test macro
Author: jfb Date: Thu Jul 21 12:34:28 2016 New Revision: 276309 URL: http://llvm.org/viewvc/llvm-project?rev=276309&view=rev Log: Remove FIXME for feature test macro The value I'd picked was correct, as per the recently published SG10 paper http://wg21.link/p0096r3 Modified: libcxx/trunk/include/atomic Modified: libcxx/trunk/include/atomic URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/atomic?rev=276309&r1=276308&r2=276309&view=diff == --- libcxx/trunk/include/atomic (original) +++ libcxx/trunk/include/atomic Thu Jul 21 12:34:28 2016 @@ -557,7 +557,6 @@ void atomic_signal_fence(memory_order m) #endif #if _LIBCPP_STD_VER > 14 -// FIXME: use the right feature test macro value as chose by SG10. # define __cpp_lib_atomic_is_always_lock_free 201603L #endif ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D22557: [libcxx] Diagnose invalid memory order arguments in . Fixes PR21179.
jfb added inline comments.
Comment at: test/libcxx/atomics/diagnose_invalid_memory_order.fail.cpp:87
@@ +86,3 @@
+x.compare_exchange_weak(val1, val2, std::memory_order_release);
+}
+{
That's not quite true: the failure ordering is auto-deduced from the success
one, but it's not necessarily the same! The spec says all success is valid, so
the auto-mapping has to ensure that all failures are also valid. That's what
I'm trying to have you test: that the auto-mapping is always valid as well.
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Re: [PATCH] D22557: [libcxx] Diagnose invalid memory order arguments in . Fixes PR21179.
On Jul 22, 2016 4:45 PM, "Eric Fiselier" wrote:
>
> EricWF added inline comments.
>
>
> Comment at: test/libcxx/atomics/diagnose_invalid_memory_order.fail.cpp:87
> @@ +86,3 @@
> +x.compare_exchange_weak(val1, val2, std::memory_order_release);
> +}
> +{
>
> jfb wrote:
> > That's not quite true: the failure ordering is auto-deduced from the
success one, but it's not necessarily the same! The spec says all success
is valid, so the auto-mapping has to ensure that all failures are also
valid. That's what I'm trying to have you test: that the auto-mapping is
always valid as well.
> Right, but the auto-mapping is done once we have entered the
`compare_exchange_weak` function, These diagnostics are triggered within
the function signature. So even if we got the auto mapping wrong this test
would not be able to diagnose it.
>
> I agree we should be testing the auto-mapping, but I don't think this
test is the right place to do it.
Ah ok, that's good with me then.
>
> https://reviews.llvm.org/D22557
>
>
>
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Re: [PATCH] D22073: libc++: test lock-free atomic alignment
jfb updated this revision to Diff 66342.
jfb added a comment.
- Move atomics.align to libcxx-specific
- Give names to anonymous structs
- Rename test, use REQUIRES / RUN commands
https://reviews.llvm.org/D22073
Files:
test/libcxx/atomics/atomics.align/align.pass.sh.cpp
Index: test/libcxx/atomics/atomics.align/align.pass.sh.cpp
===
--- /dev/null
+++ test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -0,0 +1,89 @@
+//===--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===--===//
+//
+// UNSUPPORTED: libcpp-has-no-threads, c++98, c++03
+// REQUIRES: libatomic
+// RUN: %build -latomic
+// RUN: %run
+
+//
+
+// Verify that the content of atomic is properly aligned if the type is
+// lock-free. This can't be observed through the atomic API. It is
+// nonetheless required for correctness of the implementation: lock-free
implies
+// that ISA instructions are used, and these instructions assume "suitable
+// alignment". Supported architectures all require natural alignment for
+// lock-freedom (e.g. load-linked / store-conditional, or cmpxchg).
+
+#include
+#include
+
+template struct atomic_test : public std::__atomic_base {
+ atomic_test() {
+if (this->is_lock_free())
+ assert(alignof(this->__a_) >= sizeof(this->__a_) &&
+ "expected natural alignment for lock-free type");
+ }
+};
+
+int main() {
+
+// structs and unions can't be defined in the template invocation.
+// Work around this with a typedef.
+#define CHECK_ALIGNMENT(T)
\
+ do {
\
+typedef T type;
\
+atomic_test t;
\
+ } while (0)
+
+ CHECK_ALIGNMENT(bool);
+ CHECK_ALIGNMENT(char);
+ CHECK_ALIGNMENT(signed char);
+ CHECK_ALIGNMENT(unsigned char);
+ CHECK_ALIGNMENT(char16_t);
+ CHECK_ALIGNMENT(char32_t);
+ CHECK_ALIGNMENT(wchar_t);
+ CHECK_ALIGNMENT(short);
+ CHECK_ALIGNMENT(unsigned short);
+ CHECK_ALIGNMENT(int);
+ CHECK_ALIGNMENT(unsigned int);
+ CHECK_ALIGNMENT(long);
+ CHECK_ALIGNMENT(unsigned long);
+ CHECK_ALIGNMENT(long long);
+ CHECK_ALIGNMENT(unsigned long long);
+ CHECK_ALIGNMENT(std::nullptr_t);
+ CHECK_ALIGNMENT(void *);
+ CHECK_ALIGNMENT(float);
+ CHECK_ALIGNMENT(double);
+ CHECK_ALIGNMENT(long double);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(1 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(2 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(4 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(16 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(32 * sizeof(int);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(1 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(2 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(4 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(16 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(32 * sizeof(float);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(1 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(2 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(4 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(16 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(32 * sizeof(double);
+ CHECK_ALIGNMENT(struct Empty {});
+ CHECK_ALIGNMENT(struct OneInt { int i; });
+ CHECK_ALIGNMENT(struct IntArr2 { int i[2]; });
+ CHECK_ALIGNMENT(struct LLIArr2 { long long int i[2]; });
+ CHECK_ALIGNMENT(struct LLIArr4 { long long int i[4]; });
+ CHECK_ALIGNMENT(struct LLIArr8 { long long int i[8]; });
+ CHECK_ALIGNMENT(struct LLIArr16 { long long int i[16]; });
+ CHECK_ALIGNMENT(struct Padding { char c; /* padding */ long long int i; });
+ CHECK_ALIGNMENT(union IntFloat { int i; float f; });
+}
Index: test/libcxx/atomics/atomics.align/align.pass.sh.cpp
===
--- /dev/null
+++ test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -0,0 +1,89 @@
+//===--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===--===//
+//
+// U
Re: [PATCH] D22073: libc++: test lock-free atomic alignment
jfb added a comment. In https://reviews.llvm.org/D22073#486636, @EricWF wrote: > OK, IMO the way to handle this test is to have it manually link `-latomic`. > This can be done by renaming the test to `.sh.cpp` and adding the > following lines: > > // REQUIRES: libatomic > // RUN: %build -latomic > // RUN: %run > > > After that this LGTM. Sorry for the delay in getting back to this. It's now done :) Will land after lunch (so I'm not AFK). https://reviews.llvm.org/D22073 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[libcxx] r277368 - libc++: test lock-free atomic alignment
Author: jfb
Date: Mon Aug 1 14:27:08 2016
New Revision: 277368
URL: http://llvm.org/viewvc/llvm-project?rev=277368&view=rev
Log:
libc++: test lock-free atomic alignment
Summary:
libc++ implements std::atomic<_Tp> using __atomic_base<_Tp> with
`mutable _Atomic(_Tp) __a_`. That member must be suitably aligned on
relevant ISAs for instructions such as cmpxchg to work properly, but
this alignment isn't checked anywhere. __atomic_base's implementation
relies on _Atomic doing "the right thing" since it's under the
compiler's control, and only the compiler knows about lock-freedom and
instruction generation. This test makes sure that the compiler isn't
breaking libc++'s expectations.
I'm looking at a few odd things in the C++ standard, and will have a few
other fixes around this area in the future.
This requires building with `-DLIBCXX_HAS_ATOMIC_LIB=True`, the test
marks the dependency as REQUIRES and won't be run without.
Reviewers: cfe-commits
Subscribers: EricWF, mclow.lists
Differential Revision: http://reviews.llvm.org/D22073
Added:
libcxx/trunk/test/libcxx/atomics/atomics.align/
libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
Added: libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp?rev=277368&view=auto
==
--- libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp (added)
+++ libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp Mon Aug 1
14:27:08 2016
@@ -0,0 +1,89 @@
+//===--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===--===//
+//
+// UNSUPPORTED: libcpp-has-no-threads, c++98, c++03
+// REQUIRES: libatomic
+// RUN: %build -latomic
+// RUN: %run
+
+//
+
+// Verify that the content of atomic is properly aligned if the type is
+// lock-free. This can't be observed through the atomic API. It is
+// nonetheless required for correctness of the implementation: lock-free
implies
+// that ISA instructions are used, and these instructions assume "suitable
+// alignment". Supported architectures all require natural alignment for
+// lock-freedom (e.g. load-linked / store-conditional, or cmpxchg).
+
+#include
+#include
+
+template struct atomic_test : public std::__atomic_base {
+ atomic_test() {
+if (this->is_lock_free())
+ assert(alignof(this->__a_) >= sizeof(this->__a_) &&
+ "expected natural alignment for lock-free type");
+ }
+};
+
+int main() {
+
+// structs and unions can't be defined in the template invocation.
+// Work around this with a typedef.
+#define CHECK_ALIGNMENT(T)
\
+ do {
\
+typedef T type;
\
+atomic_test t;
\
+ } while (0)
+
+ CHECK_ALIGNMENT(bool);
+ CHECK_ALIGNMENT(char);
+ CHECK_ALIGNMENT(signed char);
+ CHECK_ALIGNMENT(unsigned char);
+ CHECK_ALIGNMENT(char16_t);
+ CHECK_ALIGNMENT(char32_t);
+ CHECK_ALIGNMENT(wchar_t);
+ CHECK_ALIGNMENT(short);
+ CHECK_ALIGNMENT(unsigned short);
+ CHECK_ALIGNMENT(int);
+ CHECK_ALIGNMENT(unsigned int);
+ CHECK_ALIGNMENT(long);
+ CHECK_ALIGNMENT(unsigned long);
+ CHECK_ALIGNMENT(long long);
+ CHECK_ALIGNMENT(unsigned long long);
+ CHECK_ALIGNMENT(std::nullptr_t);
+ CHECK_ALIGNMENT(void *);
+ CHECK_ALIGNMENT(float);
+ CHECK_ALIGNMENT(double);
+ CHECK_ALIGNMENT(long double);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(1 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(2 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(4 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(16 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(32 * sizeof(int);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(1 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(2 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(4 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(16 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(32 * sizeof(float);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(1 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(2 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(4 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(16 * sizeof(double);
+ CHECK_ALIGNMENT(doubl
Re: [PATCH] D22073: libc++: test lock-free atomic alignment
This revision was automatically updated to reflect the committed changes.
Closed by commit rL277368: libc++: test lock-free atomic alignment (authored by
jfb).
Changed prior to commit:
https://reviews.llvm.org/D22073?vs=66342&id=66356#toc
Repository:
rL LLVM
https://reviews.llvm.org/D22073
Files:
libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
Index: libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
===
--- libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
+++ libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -0,0 +1,89 @@
+//===--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===--===//
+//
+// UNSUPPORTED: libcpp-has-no-threads, c++98, c++03
+// REQUIRES: libatomic
+// RUN: %build -latomic
+// RUN: %run
+
+//
+
+// Verify that the content of atomic is properly aligned if the type is
+// lock-free. This can't be observed through the atomic API. It is
+// nonetheless required for correctness of the implementation: lock-free
implies
+// that ISA instructions are used, and these instructions assume "suitable
+// alignment". Supported architectures all require natural alignment for
+// lock-freedom (e.g. load-linked / store-conditional, or cmpxchg).
+
+#include
+#include
+
+template struct atomic_test : public std::__atomic_base {
+ atomic_test() {
+if (this->is_lock_free())
+ assert(alignof(this->__a_) >= sizeof(this->__a_) &&
+ "expected natural alignment for lock-free type");
+ }
+};
+
+int main() {
+
+// structs and unions can't be defined in the template invocation.
+// Work around this with a typedef.
+#define CHECK_ALIGNMENT(T)
\
+ do {
\
+typedef T type;
\
+atomic_test t;
\
+ } while (0)
+
+ CHECK_ALIGNMENT(bool);
+ CHECK_ALIGNMENT(char);
+ CHECK_ALIGNMENT(signed char);
+ CHECK_ALIGNMENT(unsigned char);
+ CHECK_ALIGNMENT(char16_t);
+ CHECK_ALIGNMENT(char32_t);
+ CHECK_ALIGNMENT(wchar_t);
+ CHECK_ALIGNMENT(short);
+ CHECK_ALIGNMENT(unsigned short);
+ CHECK_ALIGNMENT(int);
+ CHECK_ALIGNMENT(unsigned int);
+ CHECK_ALIGNMENT(long);
+ CHECK_ALIGNMENT(unsigned long);
+ CHECK_ALIGNMENT(long long);
+ CHECK_ALIGNMENT(unsigned long long);
+ CHECK_ALIGNMENT(std::nullptr_t);
+ CHECK_ALIGNMENT(void *);
+ CHECK_ALIGNMENT(float);
+ CHECK_ALIGNMENT(double);
+ CHECK_ALIGNMENT(long double);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(1 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(2 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(4 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(16 * sizeof(int);
+ CHECK_ALIGNMENT(int __attribute__((vector_size(32 * sizeof(int);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(1 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(2 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(4 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(16 * sizeof(float);
+ CHECK_ALIGNMENT(float __attribute__((vector_size(32 * sizeof(float);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(1 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(2 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(4 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(16 * sizeof(double);
+ CHECK_ALIGNMENT(double __attribute__((vector_size(32 * sizeof(double);
+ CHECK_ALIGNMENT(struct Empty {});
+ CHECK_ALIGNMENT(struct OneInt { int i; });
+ CHECK_ALIGNMENT(struct IntArr2 { int i[2]; });
+ CHECK_ALIGNMENT(struct LLIArr2 { long long int i[2]; });
+ CHECK_ALIGNMENT(struct LLIArr4 { long long int i[4]; });
+ CHECK_ALIGNMENT(struct LLIArr8 { long long int i[8]; });
+ CHECK_ALIGNMENT(struct LLIArr16 { long long int i[16]; });
+ CHECK_ALIGNMENT(struct Padding { char c; /* padding */ long long int i; });
+ CHECK_ALIGNMENT(union IntFloat { int i; float f; });
+}
Index: libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
===
--- libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
+++ libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -0,0 +1,89 @@
+//===--===//
+//
+// The
[libcxx] r277380 - atomics.align: XFAIL GCC
Author: jfb Date: Mon Aug 1 15:28:13 2016 New Revision: 277380 URL: http://llvm.org/viewvc/llvm-project?rev=277380&view=rev Log: atomics.align: XFAIL GCC It currently fails because GCC changed the mangling of templates, which affects std::atomic using __attribute__((vector(X))). The bot using GCC 4.9 generates the following message: In file included from /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp:24:0: /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic: In instantiation of 'atomic_test::atomic_test() [with T = __vector(2) int]': /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp:66:3: required from here /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: error: 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = __vector(2) int]' conflicts with a previous declaration __gcc_atomic_t() _NOEXCEPT = default; ^ /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: note: previous declaration 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = __vector(1) int]' /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: note: -fabi-version=6 (or =0) avoids this error with a change in mangling /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: error: 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = __vector(2) int]' conflicts with a previous declaration /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: note: previous declaration 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = __vector(1) int]' /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: note: -fabi-version=6 (or =0) avoids this error with a change in mangling /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:939:5: note: synthesized method 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = __vector(2) int]' first required here __atomic_base() _NOEXCEPT = default; ^ GCC's docs say the following about ABI version 6: Version 6, which first appeared in G++ 4.7, corrects the promotion behavior of C++11 scoped enums and the mangling of template argument packs, const/static_cast, prefix ++ and –, and a class scope function used as a template argument. Modified: libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp Modified: libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp?rev=277380&r1=277379&r2=277380&view=diff == --- libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp (original) +++ libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp Mon Aug 1 15:28:13 2016 @@ -11,6 +11,10 @@ // REQUIRES: libatomic // RUN: %build -latomic // RUN: %run +// +// GCC currently fails because it needs -fabi-version=6 to fix mangling of +// std::atomic when used with __attribute__((vector(X))). +// XFAIL: gcc // ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [libcxx] r277380 - atomics.align: XFAIL GCC
I don't think I can: - Hack around __gcc_atomic_t. - Unconditionally pass -fabi-version=6 to the RUN command (because LLVM won't accept it). it seems like changing test/libcxx/test/config.py would be better. WDYT? On Mon, Aug 1, 2016 at 1:28 PM, JF Bastien via cfe-commits < cfe-commits@lists.llvm.org> wrote: > Author: jfb > Date: Mon Aug 1 15:28:13 2016 > New Revision: 277380 > > URL: http://llvm.org/viewvc/llvm-project?rev=277380&view=rev > Log: > atomics.align: XFAIL GCC > > It currently fails because GCC changed the mangling of templates, which > affects std::atomic using __attribute__((vector(X))). The bot using GCC 4.9 > generates the following message: > > In file included from > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp:24:0: > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic: > In instantiation of 'atomic_test::atomic_test() [with T = __vector(2) > int]': > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp:66:3: > required from here > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: > error: 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with > _Tp = __vector(2) int]' conflicts with a previous declaration > __gcc_atomic_t() _NOEXCEPT = default; > ^ > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: > note: previous declaration > 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = > __vector(1) int]' > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: > note: -fabi-version=6 (or =0) avoids this error with a change in mangling > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: > error: 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with > _Tp = __vector(2) int]' conflicts with a previous declaration > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: > note: previous declaration > 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = > __vector(1) int]' > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:583:5: > note: -fabi-version=6 (or =0) avoids this error with a change in mangling > /home/llvm-builder/llvm-buildslave-root/libcxx-libcxxabi-x86_64-linux-ubuntu-gcc49-cxx11/llvm/projects/libcxx/include/atomic:939:5: > note: synthesized method > 'std::__1::__gcc_atomic::__gcc_atomic_t<_Tp>::__gcc_atomic_t() [with _Tp = > __vector(2) int]' first required here > __atomic_base() _NOEXCEPT = default; > ^ > > GCC's docs say the following about ABI version 6: > Version 6, which first appeared in G++ 4.7, corrects the promotion > behavior of C++11 scoped enums and the mangling of template argument packs, > const/static_cast, prefix ++ and –, and a class scope function used as a > template argument. > > Modified: > libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp > > Modified: libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp > URL: > http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp?rev=277380&r1=277379&r2=277380&view=diff > > == > --- libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp > (original) > +++ libcxx/trunk/test/libcxx/atomics/atomics.align/align.pass.sh.cpp Mon > Aug 1 15:28:13 2016 > @@ -11,6 +11,10 @@ > // REQUIRES: libatomic > // RUN: %build -latomic > // RUN: %run > +// > +// GCC currently fails because it needs -fabi-version=6 to fix mangling of > +// std::atomic when used with __attribute__((vector(X))). > +// XFAIL: gcc > > // > > > > ___ > cfe-commits mailing list > cfe-commits@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits > ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[libcxx] r277404 - NFC: fix typo
Author: jfb
Date: Mon Aug 1 18:34:29 2016
New Revision: 277404
URL: http://llvm.org/viewvc/llvm-project?rev=277404&view=rev
Log:
NFC: fix typo
Modified:
libcxx/trunk/test/libcxx/test/config.py
Modified: libcxx/trunk/test/libcxx/test/config.py
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/libcxx/test/config.py?rev=277404&r1=277403&r2=277404&view=diff
==
--- libcxx/trunk/test/libcxx/test/config.py (original)
+++ libcxx/trunk/test/libcxx/test/config.py Mon Aug 1 18:34:29 2016
@@ -653,7 +653,7 @@ class Configuration(object):
def configure_substitutions(self):
sub = self.config.substitutions
-# Configure compiler substitions
+# Configure compiler substitutions
sub.append(('%cxx', self.cxx.path))
# Configure flags substitutions
flags_str = ' '.join(self.cxx.flags)
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[PATCH] D23041: Un-XFAIL GCC atomics.align
jfb created this revision.
jfb added a reviewer: EricWF.
jfb added a subscriber: cfe-commits.
The ABI version flag should fix the error.
https://reviews.llvm.org/D23041
Files:
test/libcxx/atomics/atomics.align/align.pass.sh.cpp
test/libcxx/test/config.py
Index: test/libcxx/test/config.py
===
--- test/libcxx/test/config.py
+++ test/libcxx/test/config.py
@@ -306,6 +306,11 @@
# Configure extra flags
compile_flags_str = self.get_lit_conf('compile_flags', '')
self.cxx.compile_flags += shlex.split(compile_flags_str)
+# GCC ABI version 6 first appeared in G++ 4.7, corrects the mangling of
+# template argument packs, which is required for the atomics.align
test.
+abi_flag = '-fabi-version=6'
+if self.cxx.hasCompileFlag(abi_flag):
+self.cxx.compile_flags += [abi_flag]
def configure_default_compile_flags(self):
# Try and get the std version from the command line. Fall back to
Index: test/libcxx/atomics/atomics.align/align.pass.sh.cpp
===
--- test/libcxx/atomics/atomics.align/align.pass.sh.cpp
+++ test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -11,10 +11,6 @@
// REQUIRES: libatomic
// RUN: %build -latomic
// RUN: %run
-//
-// GCC currently fails because it needs -fabi-version=6 to fix mangling of
-// std::atomic when used with __attribute__((vector(X))).
-// XFAIL: gcc
//
Index: test/libcxx/test/config.py
===
--- test/libcxx/test/config.py
+++ test/libcxx/test/config.py
@@ -306,6 +306,11 @@
# Configure extra flags
compile_flags_str = self.get_lit_conf('compile_flags', '')
self.cxx.compile_flags += shlex.split(compile_flags_str)
+# GCC ABI version 6 first appeared in G++ 4.7, corrects the mangling of
+# template argument packs, which is required for the atomics.align test.
+abi_flag = '-fabi-version=6'
+if self.cxx.hasCompileFlag(abi_flag):
+self.cxx.compile_flags += [abi_flag]
def configure_default_compile_flags(self):
# Try and get the std version from the command line. Fall back to
Index: test/libcxx/atomics/atomics.align/align.pass.sh.cpp
===
--- test/libcxx/atomics/atomics.align/align.pass.sh.cpp
+++ test/libcxx/atomics/atomics.align/align.pass.sh.cpp
@@ -11,10 +11,6 @@
// REQUIRES: libatomic
// RUN: %build -latomic
// RUN: %run
-//
-// GCC currently fails because it needs -fabi-version=6 to fix mangling of
-// std::atomic when used with __attribute__((vector(X))).
-// XFAIL: gcc
//
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Re: [PATCH] D23041: Un-XFAIL GCC atomics.align
jfb added a comment. @EricWF ran this on configuration `cxx_under_test=g++-4.9`. It generates the following error: libcxx/test/libcxx/atomics/atomics.align/align.pass.sh.cpp:32: atomic_test::atomic_test() [with T = std::nullptr_t]: Assertion `alignof(this->__a_) >= sizeof(this->__a_) && "expected natural alignment for lock-free type"' failed. I think GCC is broken. See the following (semi-relevant) test: https://godbolt.org/g/pFUqVY That's not quite what I'm testing (this used libstdc++ and looks at `std::atomic`, not the value contained), but I'd nonetheless expect the `std::atomic` container to be sufficiently aligned. WDYT? Is that only happening for `nullptr_t`? I can conditionally disable the `nullptr_t` test for GCC, and file a bug on GCC. https://reviews.llvm.org/D23041 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D23041: Un-XFAIL GCC atomics.align
jfb added a comment. I wrote a quick test, and I think this is technically OK for x86 because alignment "Just Works", but I think it's borked on GCC+ARM (I don't have a system to test that here): https://github.com/jfbastien/atomic_nullptr/blob/master/atomic_nullptr.cc https://reviews.llvm.org/D23041 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D22711: Diagnose invalid failure memory orderings.
jfb added a comment. Warnings look correct. Could they be made more useful by suggesting that `acq_rel` be `acquire` instead, and `release` be `relaxed` instead? https://reviews.llvm.org/D22711 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
[PATCH] D17349: ARM: fix VFP asm constraints
jfb created this revision. jfb added a subscriber: cfe-commits. Herald added subscribers: rengolin, aemerson. Rich Felker was sad that clang used 'w' and 'P' for VFP constraints when GCC documents them as 't' and 'w': https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html This was added way back in 2008: http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20080421/005393.html http://reviews.llvm.org/D17349 Files: lib/Basic/Targets.cpp Index: lib/Basic/Targets.cpp === --- lib/Basic/Targets.cpp +++ lib/Basic/Targets.cpp @@ -4939,8 +4939,8 @@ default: break; case 'l': // r0-r7 case 'h': // r8-r15 -case 'w': // VFP Floating point register single precision -case 'P': // VFP Floating point register double precision +case 't': // VFP Floating point register single precision +case 'w': // VFP Floating point register double precision Info.setAllowsRegister(); return true; case 'I': Index: lib/Basic/Targets.cpp === --- lib/Basic/Targets.cpp +++ lib/Basic/Targets.cpp @@ -4939,8 +4939,8 @@ default: break; case 'l': // r0-r7 case 'h': // r8-r15 -case 'w': // VFP Floating point register single precision -case 'P': // VFP Floating point register double precision +case 't': // VFP Floating point register single precision +case 'w': // VFP Floating point register double precision Info.setAllowsRegister(); return true; case 'I': ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
Re: [PATCH] D17349: ARM: fix VFP asm constraints
jfb added a comment. As a reference, here's the GCC source (instead of the docs): https://raw.githubusercontent.com/gcc-mirror/gcc/master/gcc/config/arm/constraints.md http://reviews.llvm.org/D17349 ___ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
