stevewan updated this revision to Diff 369293.
stevewan added a comment.
Adapt to new TypeInfo design
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D107394/new/
https://reviews.llvm.org/D107394
Files:
clang/lib/AST/ASTContext.cpp
clang/lib/AST/RecordLayoutBuilder.cpp
clang/test/Layout/aix-alignof-align-and-pack-attr.cpp
clang/test/Layout/aix-power-alignment-typedef.cpp
clang/test/Layout/aix-type-align-and-pack-attr.cpp
Index: clang/test/Layout/aix-type-align-and-pack-attr.cpp
===================================================================
--- /dev/null
+++ clang/test/Layout/aix-type-align-and-pack-attr.cpp
@@ -0,0 +1,59 @@
+// RUN: %clang_cc1 -triple powerpc-ibm-aix-xcoff -S -emit-llvm -x c++ < %s | \
+// RUN: FileCheck %s
+
+// RUN: %clang_cc1 -triple powerpc64-ibm-aix-xcoff -S -emit-llvm -x c++ < %s | \
+// RUN: FileCheck %s
+
+namespace test1 {
+struct __attribute__((__aligned__(2))) S {
+ double d;
+};
+
+S s;
+
+// CHECK: @{{.*}}test1{{.*}}s{{.*}} = global %"struct.test1::S" zeroinitializer, align 8
+} // namespace test1
+
+namespace test2 {
+struct __attribute__((__aligned__(2), packed)) S {
+ double d;
+};
+
+S s;
+
+// CHECK: @{{.*}}test2{{.*}}s{{.*}} = global %"struct.test2::S" zeroinitializer, align 2
+} // namespace test2
+
+namespace test3 {
+struct __attribute__((__aligned__(16))) S {
+ double d;
+};
+
+S s;
+
+// CHECK: @{{.*}}test3{{.*}}s{{.*}} = global %"struct.test3::S" zeroinitializer, align 16
+} // namespace test3
+
+namespace test4 {
+struct __attribute__((aligned(2))) SS {
+ double d;
+};
+
+struct S {
+ struct SS ss;
+} s;
+
+// CHECK: @{{.*}}test4{{.*}}s{{.*}} = global %"struct.test4::S" zeroinitializer, align 8
+} // namespace test4
+
+namespace test5 {
+struct __attribute__((aligned(2), packed)) SS {
+ double d;
+};
+
+struct S {
+ struct SS ss;
+} s;
+
+// CHECK: @{{.*}}test5{{.*}}s{{.*}} = global %"struct.test5::S" zeroinitializer, align 2
+} // namespace test5
Index: clang/test/Layout/aix-power-alignment-typedef.cpp
===================================================================
--- clang/test/Layout/aix-power-alignment-typedef.cpp
+++ clang/test/Layout/aix-power-alignment-typedef.cpp
@@ -37,3 +37,39 @@
// CHECK-NEXT: | nvsize=2, nvalign=2, preferrednvalign=2]
} // namespace test2
+
+namespace test3 {
+typedef double DblArr[] __attribute__((__aligned__(2)));
+
+union U {
+ DblArr da;
+ char x;
+};
+
+int x = sizeof(U);
+
+// CHECK: 0 | union test3::U
+// CHECK-NEXT: 0 | test3::DblArr da
+// CHECK-NEXT: 0 | char x
+// CHECK-NEXT: | [sizeof=2, dsize=2, align=2, preferredalign=2,
+// CHECK-NEXT: | nvsize=2, nvalign=2, preferrednvalign=2]
+
+} // namespace test3
+
+namespace test4 {
+typedef double Dbl __attribute__((__aligned__(2)));
+
+union U {
+ Dbl DblArr[];
+ char x;
+};
+
+int x = sizeof(U);
+
+// CHECK: 0 | union test4::U
+// CHECK-NEXT: 0 | test4::Dbl [] DblArr
+// CHECK-NEXT: 0 | char x
+// CHECK-NEXT: | [sizeof=2, dsize=2, align=2, preferredalign=2,
+// CHECK-NEXT: | nvsize=2, nvalign=2, preferrednvalign=2]
+
+} // namespace test4
Index: clang/test/Layout/aix-alignof-align-and-pack-attr.cpp
===================================================================
--- clang/test/Layout/aix-alignof-align-and-pack-attr.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-// RUN: %clang_cc1 -triple powerpc-ibm-aix-xcoff -S -emit-llvm -x c++ < %s | \
-// RUN: FileCheck %s
-
-// RUN: %clang_cc1 -triple powerpc64-ibm-aix-xcoff -S -emit-llvm -x c++ < %s | \
-// RUN: FileCheck %s
-
-namespace test1 {
-struct __attribute__((__aligned__(2))) C {
- double x;
-} c;
-
-// CHECK: @{{.*}}test1{{.*}}c{{.*}} = global %"struct.test1::C" zeroinitializer, align 8
-} // namespace test1
-
-namespace test2 {
-struct __attribute__((__aligned__(2), packed)) C {
- double x;
-} c;
-
-// CHECK: @{{.*}}test2{{.*}}c{{.*}} = global %"struct.test2::C" zeroinitializer, align 2
-} // namespace test2
-
-namespace test3 {
-struct __attribute__((__aligned__(16))) C {
- double x;
-} c;
-
-// CHECK: @{{.*}}test3{{.*}}c{{.*}} = global %"struct.test3::C" zeroinitializer, align 16
-} // namespace test3
Index: clang/lib/AST/RecordLayoutBuilder.cpp
===================================================================
--- clang/lib/AST/RecordLayoutBuilder.cpp
+++ clang/lib/AST/RecordLayoutBuilder.cpp
@@ -1968,6 +1968,16 @@
}
}
+ // When used as part of a typedef, or together with a 'packed' attribute, the
+ // 'aligned' attribute can be used to decrease alignment. In that case, it
+ // overrides any computed alignment we have, and there is no need to upgrade
+ // the alignment.
+ auto alignedAttrCanDecreaseAlignment = [AlignRequirement, FieldPacked] {
+ return AlignRequirement == AlignRequirementType::RequiredByTypedef ||
+ (AlignRequirement == AlignRequirementType::RequiredByRecord &&
+ FieldPacked);
+ };
+
// The AIX `power` alignment rules apply the natural alignment of the
// "first member" if it is of a floating-point data type (or is an aggregate
// whose recursively "first" member or element is such a type). The alignment
@@ -1978,8 +1988,7 @@
// and zero-width bit-fields count as prior members; members of empty class
// types marked `no_unique_address` are not considered to be prior members.
CharUnits PreferredAlign = FieldAlign;
- if (DefaultsToAIXPowerAlignment &&
- AlignRequirement == AlignRequirementKind::None &&
+ if (DefaultsToAIXPowerAlignment && !alignedAttrCanDecreaseAlignment() &&
(FoundFirstNonOverlappingEmptyFieldForAIX || IsNaturalAlign)) {
auto performBuiltinTypeAlignmentUpgrade = [&](const BuiltinType *BTy) {
if (BTy->getKind() == BuiltinType::Double ||
@@ -1990,12 +1999,13 @@
}
};
- const Type *Ty = D->getType()->getBaseElementTypeUnsafe();
- if (const ComplexType *CTy = Ty->getAs<ComplexType>()) {
- performBuiltinTypeAlignmentUpgrade(CTy->getElementType()->castAs<BuiltinType>());
- } else if (const BuiltinType *BTy = Ty->getAs<BuiltinType>()) {
+ const Type *BaseTy = D->getType()->getBaseElementTypeUnsafe();
+ if (const ComplexType *CTy = BaseTy->getAs<ComplexType>()) {
+ performBuiltinTypeAlignmentUpgrade(
+ CTy->getElementType()->castAs<BuiltinType>());
+ } else if (const BuiltinType *BTy = BaseTy->getAs<BuiltinType>()) {
performBuiltinTypeAlignmentUpgrade(BTy);
- } else if (const RecordType *RT = Ty->getAs<RecordType>()) {
+ } else if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
const RecordDecl *RD = RT->getDecl();
assert(RD && "Expected non-null RecordDecl.");
const ASTRecordLayout &FieldRecord = Context.getASTRecordLayout(RD);
Index: clang/lib/AST/ASTContext.cpp
===================================================================
--- clang/lib/AST/ASTContext.cpp
+++ clang/lib/AST/ASTContext.cpp
@@ -1975,7 +1975,7 @@
Align = Width;
// If the alignment is not a power of 2, round up to the next power of 2.
// This happens for non-power-of-2 length vectors.
- if (Align & (Align-1)) {
+ if (Align & (Align - 1)) {
Align = llvm::NextPowerOf2(Align);
Width = llvm::alignTo(Width, Align);
}
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