https://github.com/BeMg updated https://github.com/llvm/llvm-project/pull/85786
>From 239b404203c66ab5336ffdfb45969a50c439a1c0 Mon Sep 17 00:00:00 2001
From: Piyou Chen <piyou.c...@sifive.com>
Date: Tue, 19 Mar 2024 06:22:17 -0700
Subject: [PATCH 1/2] [RISCV][FMV] Support target_clones
---
clang/include/clang/Basic/TargetInfo.h | 3 +-
clang/lib/AST/ASTContext.cpp | 9 ++
clang/lib/Basic/Targets/RISCV.cpp | 10 +-
clang/lib/Basic/Targets/RISCV.h | 2 +
clang/lib/CodeGen/CodeGenFunction.cpp | 102 ++++++++++++-
clang/lib/CodeGen/CodeGenFunction.h | 3 +
clang/lib/CodeGen/CodeGenModule.cpp | 2 +
clang/lib/CodeGen/Targets/RISCV.cpp | 23 +++
clang/lib/Sema/SemaDeclAttr.cpp | 22 +++
clang/test/CodeGen/attr-target-clones-riscv.c | 135 +++++++++++++++++
.../CodeGenCXX/attr-target-clones-riscv.cpp | 136 ++++++++++++++++++
.../test/SemaCXX/attr-target-clones-riscv.cpp | 19 +++
12 files changed, 462 insertions(+), 4 deletions(-)
create mode 100644 clang/test/CodeGen/attr-target-clones-riscv.c
create mode 100644 clang/test/CodeGenCXX/attr-target-clones-riscv.cpp
create mode 100644 clang/test/SemaCXX/attr-target-clones-riscv.cpp
diff --git a/clang/include/clang/Basic/TargetInfo.h
b/clang/include/clang/Basic/TargetInfo.h
index 374595edd2ce4a..aa48596fbce07d 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -1445,7 +1445,8 @@ class TargetInfo : public TransferrableTargetInfo,
/// Identify whether this target supports multiversioning of functions,
/// which requires support for cpu_supports and cpu_is functionality.
bool supportsMultiVersioning() const {
- return getTriple().isX86() || getTriple().isAArch64();
+ return getTriple().isX86() || getTriple().isAArch64() ||
+ getTriple().isRISCV();
}
/// Identify whether this target supports IFuncs.
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 5a8fae76a43a4d..0fd75e0b36b123 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -13636,6 +13636,15 @@ void
ASTContext::getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap,
Features.insert(Features.begin(),
Target->getTargetOpts().FeaturesAsWritten.begin(),
Target->getTargetOpts().FeaturesAsWritten.end());
+ } else if (Target->getTriple().isRISCV()) {
+ if (VersionStr != "default") {
+ ParsedTargetAttr ParsedAttr = Target->parseTargetAttr(VersionStr);
+ Features.insert(Features.begin(), ParsedAttr.Features.begin(),
+ ParsedAttr.Features.end());
+ }
+ Features.insert(Features.begin(),
+ Target->getTargetOpts().FeaturesAsWritten.begin(),
+ Target->getTargetOpts().FeaturesAsWritten.end());
} else {
if (VersionStr.starts_with("arch="))
TargetCPU = VersionStr.drop_front(sizeof("arch=") - 1);
diff --git a/clang/lib/Basic/Targets/RISCV.cpp
b/clang/lib/Basic/Targets/RISCV.cpp
index a6d4af2b88111a..8e9132c9191a3c 100644
--- a/clang/lib/Basic/Targets/RISCV.cpp
+++ b/clang/lib/Basic/Targets/RISCV.cpp
@@ -257,7 +257,7 @@ bool RISCVTargetInfo::initFeatureMap(
// If a target attribute specified a full arch string, override all the ISA
// extension target features.
- const auto I = llvm::find(FeaturesVec, "__RISCV_TargetAttrNeedOverride");
+ const auto I = llvm::find(FeaturesVec, "+__RISCV_TargetAttrNeedOverride");
if (I != FeaturesVec.end()) {
std::vector<std::string> OverrideFeatures(std::next(I), FeaturesVec.end());
@@ -366,6 +366,12 @@ bool
RISCVTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
return true;
}
+bool RISCVTargetInfo::isValidFeatureName(StringRef Feature) const {
+ if (Feature.starts_with("__RISCV_TargetAttrNeedOverride"))
+ return true;
+ return llvm::RISCVISAInfo::isSupportedExtensionFeature(Feature);
+}
+
bool RISCVTargetInfo::isValidCPUName(StringRef Name) const {
bool Is64Bit = getTriple().isArch64Bit();
return llvm::RISCV::parseCPU(Name, Is64Bit);
@@ -390,7 +396,7 @@ void RISCVTargetInfo::fillValidTuneCPUList(
static void handleFullArchString(StringRef FullArchStr,
std::vector<std::string> &Features) {
- Features.push_back("__RISCV_TargetAttrNeedOverride");
+ Features.push_back("+__RISCV_TargetAttrNeedOverride");
auto RII = llvm::RISCVISAInfo::parseArchString(
FullArchStr, /* EnableExperimentalExtension */ true);
if (llvm::errorToBool(RII.takeError())) {
diff --git a/clang/lib/Basic/Targets/RISCV.h b/clang/lib/Basic/Targets/RISCV.h
index bfbdafb682c851..ef8f59185d753c 100644
--- a/clang/lib/Basic/Targets/RISCV.h
+++ b/clang/lib/Basic/Targets/RISCV.h
@@ -106,6 +106,8 @@ class RISCVTargetInfo : public TargetInfo {
bool handleTargetFeatures(std::vector<std::string> &Features,
DiagnosticsEngine &Diags) override;
+ bool isValidFeatureName(StringRef Feature) const override;
+
bool hasBitIntType() const override { return true; }
bool hasBFloat16Type() const override { return true; }
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp
b/clang/lib/CodeGen/CodeGenFunction.cpp
index 4a3ff49b0007a3..544c696376cd89 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -2803,12 +2803,112 @@ void CodeGenFunction::EmitMultiVersionResolver(
case llvm::Triple::aarch64:
EmitAArch64MultiVersionResolver(Resolver, Options);
return;
+ case llvm::Triple::riscv32:
+ case llvm::Triple::riscv64:
+ EmitRISCVMultiVersionResolver(Resolver, Options);
+ return;
default:
- assert(false && "Only implemented for x86 and AArch64 targets");
+ assert(false && "Only implemented for x86, AArch64 and RISC-V targets");
}
}
+void CodeGenFunction::EmitRISCVMultiVersionResolver(
+ llvm::Function *Resolver, ArrayRef<MultiVersionResolverOption> Options) {
+
+ auto EmitIFUNCFeatureCheckFunc =
+ [&](std::string CurrFeatStr) -> llvm::Value * {
+ llvm::Constant *FeatStr = Builder.CreateGlobalString(CurrFeatStr);
+ llvm::Type *Args[] = {Int8PtrTy};
+ llvm::FunctionType *FTy =
+ llvm::FunctionType::get(Builder.getInt1Ty(), Args, /*Variadic*/ false);
+ llvm::FunctionCallee Func =
+ CGM.CreateRuntimeFunction(FTy, "__riscv_ifunc_select");
+ cast<llvm::GlobalValue>(Func.getCallee())->setDSOLocal(true);
+ cast<llvm::GlobalValue>(Func.getCallee())
+ ->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass);
+ return Builder.CreateCall(Func, FeatStr);
+ };
+
+ llvm::BasicBlock *CurBlock = createBasicBlock("resolver_entry", Resolver);
+ Builder.SetInsertPoint(CurBlock);
+
+ bool SupportsIFunc = getContext().getTargetInfo().supportsIFunc();
+ bool HasDefault = false;
+ int DefaultIndex = 0;
+ // Check the each candidate function.
+ for (unsigned Index = 0; Index < Options.size(); Index++) {
+
+ if (Options[Index].Conditions.Features[0].starts_with("default")) {
+ HasDefault = true;
+ DefaultIndex = Index;
+ continue;
+ }
+
+ Builder.SetInsertPoint(CurBlock);
+
+ std::vector<std::string> TargetAttrFeats =
+ getContext()
+ .getTargetInfo()
+ .parseTargetAttr(Options[Index].Conditions.Features[0])
+ .Features;
+
+ if (!TargetAttrFeats.empty()) {
+ // If this function doens't need override, then merge with module level
+ // target features. Otherwise, remain the current target features.
+ auto I = llvm::find(TargetAttrFeats, "+__RISCV_TargetAttrNeedOverride");
+ if (I == TargetAttrFeats.end())
+ TargetAttrFeats.insert(TargetAttrFeats.begin(),
+
Target.getTargetOpts().FeaturesAsWritten.begin(),
+ Target.getTargetOpts().FeaturesAsWritten.end());
+ else
+ TargetAttrFeats.erase(I);
+
+ // Only consider +<extension-feature>.
+ std::vector<std::string> PlusTargetAttrFeats;
+ for (StringRef Feat : TargetAttrFeats) {
+ if (!getContext().getTargetInfo().isValidFeatureName(
+ Feat.substr(1).str()))
+ continue;
+ if (Feat.starts_with("+"))
+ PlusTargetAttrFeats.push_back(Feat.substr(1).str());
+ }
+
+ // Join with ';' delimiter
+ std::string CurrFeatStr = std::accumulate(
+ std::begin(PlusTargetAttrFeats), std::end(PlusTargetAttrFeats),
+ std::string(), [](const std::string &a, const std::string &b) {
+ return a.empty() ? b : a + ";" + b;
+ });
+
+ llvm::Value *Condition = EmitIFUNCFeatureCheckFunc(CurrFeatStr);
+ llvm::BasicBlock *RetBlock =
+ createBasicBlock("resolver_return", Resolver);
+ CGBuilderTy RetBuilder(*this, RetBlock);
+ CreateMultiVersionResolverReturn(CGM, Resolver, RetBuilder,
+ Options[Index].Function, SupportsIFunc);
+ CurBlock = createBasicBlock("resolver_else", Resolver);
+ Builder.CreateCondBr(Condition, RetBlock, CurBlock);
+ }
+ }
+
+ // Finally, emit the default one.
+ if (HasDefault) {
+ Builder.SetInsertPoint(CurBlock);
+ CreateMultiVersionResolverReturn(
+ CGM, Resolver, Builder, Options[DefaultIndex].Function, SupportsIFunc);
+ return;
+ }
+
+ // If no generic/default, emit an unreachable.
+ Builder.SetInsertPoint(CurBlock);
+ llvm::CallInst *TrapCall = EmitTrapCall(llvm::Intrinsic::trap);
+ TrapCall->setDoesNotReturn();
+ TrapCall->setDoesNotThrow();
+ Builder.CreateUnreachable();
+ Builder.ClearInsertionPoint();
+}
+
void CodeGenFunction::EmitAArch64MultiVersionResolver(
llvm::Function *Resolver, ArrayRef<MultiVersionResolverOption> Options) {
assert(!Options.empty() && "No multiversion resolver options found");
diff --git a/clang/lib/CodeGen/CodeGenFunction.h
b/clang/lib/CodeGen/CodeGenFunction.h
index e8f8aa601ed017..e62657de7b7323 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -5013,6 +5013,9 @@ class CodeGenFunction : public CodeGenTypeCache {
void
EmitAArch64MultiVersionResolver(llvm::Function *Resolver,
ArrayRef<MultiVersionResolverOption>
Options);
+ void
+ EmitRISCVMultiVersionResolver(llvm::Function *Resolver,
+ ArrayRef<MultiVersionResolverOption> Options);
private:
QualType getVarArgType(const Expr *Arg);
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp
b/clang/lib/CodeGen/CodeGenModule.cpp
index 8ceecff28cbc63..e571dbb384b78d 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -4161,6 +4161,8 @@ void CodeGenModule::emitMultiVersionFunctions() {
for (auto &CurFeat : VerFeats)
Feature.push_back(CurFeat.trim());
}
+ } else if (getTarget().getTriple().isRISCV()) {
+ Feature.push_back(Version);
} else {
if (Version.starts_with("arch="))
Architecture = Version.drop_front(sizeof("arch=") - 1);
diff --git a/clang/lib/CodeGen/Targets/RISCV.cpp
b/clang/lib/CodeGen/Targets/RISCV.cpp
index 9a79424c4612ce..30c10c35133161 100644
--- a/clang/lib/CodeGen/Targets/RISCV.cpp
+++ b/clang/lib/CodeGen/Targets/RISCV.cpp
@@ -63,9 +63,32 @@ class RISCVABIInfo : public DefaultABIInfo {
CharUnits Field2Off) const;
ABIArgInfo coerceVLSVector(QualType Ty) const;
+
+ using ABIInfo::appendAttributeMangling;
+ void appendAttributeMangling(TargetClonesAttr *Attr, unsigned Index,
+ raw_ostream &Out) const override;
+ void appendAttributeMangling(StringRef AttrStr,
+ raw_ostream &Out) const override;
};
} // end anonymous namespace
+void RISCVABIInfo::appendAttributeMangling(TargetClonesAttr *Attr,
+ unsigned Index,
+ raw_ostream &Out) const {
+ appendAttributeMangling(Attr->getFeatureStr(Index), Out);
+}
+
+void RISCVABIInfo::appendAttributeMangling(StringRef AttrStr,
+ raw_ostream &Out) const {
+ if (AttrStr == "default") {
+ Out << ".default";
+ return;
+ }
+
+ Out << '.';
+ Out << AttrStr;
+}
+
void RISCVABIInfo::computeInfo(CGFunctionInfo &FI) const {
QualType RetTy = FI.getReturnType();
if (!getCXXABI().classifyReturnType(FI))
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index ec00fdf3f88d9e..9e44e6a3b70734 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -3626,6 +3626,28 @@ bool Sema::checkTargetClonesAttrString(
if (hasArmStreamingInterface(cast<FunctionDecl>(D)))
return Diag(LiteralLoc,
diag::err_sme_streaming_cannot_be_multiversioned);
+ } else if (TInfo.getTriple().isRISCV()) {
+ if (Str.starts_with("arch=")) {
+ // parseTargetAttr will parse full version string,
+ // the following split Cur string is no longer interesting.
+ if ((!Cur.starts_with("arch=")))
+ continue;
+
+ ParsedTargetAttr TargetAttr =
+ Context.getTargetInfo().parseTargetAttr(Str);
+ if (TargetAttr.Features.empty())
+ return Diag(CurLoc, diag::warn_unsupported_target_attribute)
+ << Unsupported << None << Str << TargetClones;
+ } else if (Str == "default") {
+ DefaultIsDupe = HasDefault;
+ HasDefault = true;
+ } else {
+ return Diag(CurLoc, diag::warn_unsupported_target_attribute)
+ << Unsupported << None << Str << TargetClones;
+ }
+ if (llvm::is_contained(StringsBuffer, Str) || DefaultIsDupe)
+ Diag(CurLoc, diag::warn_target_clone_duplicate_options);
+ StringsBuffer.push_back(Str);
} else {
// Other targets ( currently X86 )
if (Cur.starts_with("arch=")) {
diff --git a/clang/test/CodeGen/attr-target-clones-riscv.c
b/clang/test/CodeGen/attr-target-clones-riscv.c
new file mode 100644
index 00000000000000..70b74befb54ffb
--- /dev/null
+++ b/clang/test/CodeGen/attr-target-clones-riscv.c
@@ -0,0 +1,135 @@
+// RUN: %clang_cc1 -triple riscv64-linux-gnu -target-feature +i -S -emit-llvm
-o - %s | FileCheck %s
+
+__attribute__((target_clones("default", "arch=rv64gc"))) int foo1(void) {
return 1; }
+__attribute__((target_clones("default", "arch=+zbb"))) int foo2(void) { return
2; }
+__attribute__((target_clones("default", "arch=+zbb,+c"))) int foo3(void) {
return 3; }
+__attribute__((target_clones("default", "arch=rv64gc", "arch=+zbb,+v"))) int
foo4(void) { return 4; }
+__attribute__((target_clones("default"))) int foo5(void) { return 5; }
+
+int bar() {
+ return foo1() + foo2() + foo3() + foo4();
+}
+
+//.
+// CHECK: @[[GLOB0:[0-9]+]] = private unnamed_addr constant [25 x i8]
c"m;a;f;d;c;zicsr;zifencei\00", align 1
+// CHECK: @[[GLOB1:[0-9]+]] = private unnamed_addr constant [6 x i8]
c"i;zbb\00", align 1
+// CHECK: @[[GLOB2:[0-9]+]] = private unnamed_addr constant [8 x i8]
c"i;zbb;c\00", align 1
+// CHECK: @[[GLOB3:[0-9]+]] = private unnamed_addr constant [25 x i8]
c"m;a;f;d;c;zicsr;zifencei\00", align 1
+// CHECK: @[[GLOB4:[0-9]+]] = private unnamed_addr constant [8 x i8]
c"i;zbb;v\00", align 1
+// CHECK: @foo1.ifunc = weak_odr alias i32 (), ptr @foo1
+// CHECK: @foo2.ifunc = weak_odr alias i32 (), ptr @foo2
+// CHECK: @foo3.ifunc = weak_odr alias i32 (), ptr @foo3
+// CHECK: @foo4.ifunc = weak_odr alias i32 (), ptr @foo4
+// CHECK: @foo5.ifunc = weak_odr alias i32 (), ptr @foo5
+// CHECK: @foo1 = weak_odr ifunc i32 (), ptr @foo1.resolver
+// CHECK: @foo2 = weak_odr ifunc i32 (), ptr @foo2.resolver
+// CHECK: @foo3 = weak_odr ifunc i32 (), ptr @foo3.resolver
+// CHECK: @foo4 = weak_odr ifunc i32 (), ptr @foo4.resolver
+// CHECK: @foo5 = weak_odr ifunc i32 (), ptr @foo5.resolver
+//.
+// CHECK-LABEL: define dso_local signext i32 @foo1.default(
+// CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 1
+//
+//
+// CHECK-LABEL: define weak_odr ptr @foo1.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB0]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"foo1.arch=rv64gc"
+// CHECK: resolver_else:
+// CHECK-NEXT: ret ptr @foo1.default
+//
+//
+// CHECK-LABEL: define dso_local signext i32 @foo2.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 2
+//
+//
+// CHECK-LABEL: define weak_odr ptr @foo2.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB1]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"foo2.arch=+zbb"
+// CHECK: resolver_else:
+// CHECK-NEXT: ret ptr @foo2.default
+//
+//
+// CHECK-LABEL: define dso_local signext i32 @foo3.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 3
+//
+//
+// CHECK-LABEL: define weak_odr ptr @foo3.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB2]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"foo3.arch=+zbb,+c"
+// CHECK: resolver_else:
+// CHECK-NEXT: ret ptr @foo3.default
+//
+//
+// CHECK-LABEL: define dso_local signext i32 @foo4.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 4
+//
+//
+// CHECK-LABEL: define weak_odr ptr @foo4.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB3]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"foo4.arch=rv64gc"
+// CHECK: resolver_else:
+// CHECK-NEXT: [[TMP1:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB4]])
+// CHECK-NEXT: br i1 [[TMP1]], label [[RESOLVER_RETURN1:%.*]], label
[[RESOLVER_ELSE2:%.*]]
+// CHECK: resolver_return1:
+// CHECK-NEXT: ret ptr @"foo4.arch=+zbb,+v"
+// CHECK: resolver_else2:
+// CHECK-NEXT: ret ptr @foo4.default
+//
+//
+// CHECK-LABEL: define dso_local signext i32 @foo5.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 5
+//
+//
+// CHECK-LABEL: define weak_odr ptr @foo5.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: ret ptr @foo5.default
+//
+//
+// CHECK-LABEL: define dso_local signext i32 @bar(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[CALL:%.*]] = call signext i32 @foo1()
+// CHECK-NEXT: [[CALL1:%.*]] = call signext i32 @foo2()
+// CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[CALL]], [[CALL1]]
+// CHECK-NEXT: [[CALL2:%.*]] = call signext i32 @foo3()
+// CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[ADD]], [[CALL2]]
+// CHECK-NEXT: [[CALL4:%.*]] = call signext i32 @foo4()
+// CHECK-NEXT: [[ADD5:%.*]] = add nsw i32 [[ADD3]], [[CALL4]]
+// CHECK-NEXT: ret i32 [[ADD5]]
+//
+//.
+// CHECK: attributes #[[ATTR0]] = { noinline nounwind optnone
"no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+i" }
+// CHECK: attributes #[[ATTR1:[0-9]+]] = { noinline nounwind optnone
"no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+a,+c,+d,+f,+m,+zicsr,+zifencei,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zaamo,-experimental-zabha,-experimental-zalasr,-experimental-zalrsc,-experimental-zcmop,-experimental-zfbfmin,-experimental-zicfilp,-experimental-zicfiss,-experimental-zimop,-experimental-ztso,-experimental-zvfbfmin,-experimental-zvfbfwma,-h,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smepmp,-ssaia,-ssccptr,-sscofpmf,-sscounterenw,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-za128rs,-za64rs,-zacas,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmp,-zcmt,-zdinx,-zfa,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zihintntl,-zihintpause,-zihpm,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-zmmul,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b"
}
+// CHECK: attributes #[[ATTR2:[0-9]+]] = { noinline nounwind optnone
"no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+i,+zbb" }
+// CHECK: attributes #[[ATTR3:[0-9]+]] = { noinline nounwind optnone
"no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+c,+i,+zbb" }
+// CHECK: attributes #[[ATTR4:[0-9]+]] = { noinline nounwind optnone
"no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+d,+f,+i,+v,+zbb,+zicsr,+zve32f,+zve32x,+zve64d,+zve64f,+zve64x,+zvl128b,+zvl32b,+zvl64b"
}
+//.
+// CHECK: [[META0:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
+// CHECK: [[META1:![0-9]+]] = !{i32 1, !"target-abi", !"lp64"}
+// CHECK: [[META2:![0-9]+]] = !{i32 6, !"riscv-isa", [[META3:![0-9]+]]}
+// CHECK: [[META3]] = !{!"rv64i2p1"}
+// CHECK: [[META4:![0-9]+]] = !{i32 8, !"SmallDataLimit", i32 0}
+// CHECK: [[META5:![0-9]+]] = !{!"{{.*}}clang version {{.*}}"}
+//.
diff --git a/clang/test/CodeGenCXX/attr-target-clones-riscv.cpp
b/clang/test/CodeGenCXX/attr-target-clones-riscv.cpp
new file mode 100644
index 00000000000000..12f5d0284504bc
--- /dev/null
+++ b/clang/test/CodeGenCXX/attr-target-clones-riscv.cpp
@@ -0,0 +1,136 @@
+// RUN: %clang_cc1 -std=c++11 -triple riscv64-linux-gnu -target-feature +i
-target-feature +m -emit-llvm %s -o - | FileCheck %s
+
+__attribute__((target_clones("default", "arch=rv64gc"))) int foo1(void) {
return 1; }
+__attribute__((target_clones("default", "arch=+zbb"))) int foo2(void) { return
2; }
+__attribute__((target_clones("default", "arch=+zbb,+c"))) int foo3(void) {
return 3; }
+__attribute__((target_clones("default", "arch=rv64gc", "arch=+zbb,+v"))) int
foo4(void) { return 4; }
+__attribute__((target_clones("default"))) int foo5(void) { return 5; }
+
+int bar() {
+ return foo1() + foo2() + foo3() + foo4();
+}
+
+
+//.
+// CHECK: @[[GLOB0:[0-9]+]] = private unnamed_addr constant [25 x i8]
c"m;a;f;d;c;zicsr;zifencei\00", align 1
+// CHECK: @[[GLOB1:[0-9]+]] = private unnamed_addr constant [8 x i8]
c"i;m;zbb\00", align 1
+// CHECK: @[[GLOB2:[0-9]+]] = private unnamed_addr constant [10 x i8]
c"i;m;zbb;c\00", align 1
+// CHECK: @[[GLOB3:[0-9]+]] = private unnamed_addr constant [25 x i8]
c"m;a;f;d;c;zicsr;zifencei\00", align 1
+// CHECK: @[[GLOB4:[0-9]+]] = private unnamed_addr constant [10 x i8]
c"i;m;zbb;v\00", align 1
+// CHECK: @_Z4foo1v.ifunc = weak_odr alias i32 (), ptr @_Z4foo1v
+// CHECK: @_Z4foo2v.ifunc = weak_odr alias i32 (), ptr @_Z4foo2v
+// CHECK: @_Z4foo3v.ifunc = weak_odr alias i32 (), ptr @_Z4foo3v
+// CHECK: @_Z4foo4v.ifunc = weak_odr alias i32 (), ptr @_Z4foo4v
+// CHECK: @_Z4foo5v.ifunc = weak_odr alias i32 (), ptr @_Z4foo5v
+// CHECK: @_Z4foo1v = weak_odr ifunc i32 (), ptr @_Z4foo1v.resolver
+// CHECK: @_Z4foo2v = weak_odr ifunc i32 (), ptr @_Z4foo2v.resolver
+// CHECK: @_Z4foo3v = weak_odr ifunc i32 (), ptr @_Z4foo3v.resolver
+// CHECK: @_Z4foo4v = weak_odr ifunc i32 (), ptr @_Z4foo4v.resolver
+// CHECK: @_Z4foo5v = weak_odr ifunc i32 (), ptr @_Z4foo5v.resolver
+//.
+// CHECK-LABEL: define dso_local noundef signext i32 @_Z4foo1v.default(
+// CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 1
+//
+//
+// CHECK-LABEL: define weak_odr ptr @_Z4foo1v.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB0]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"_Z4foo1v.arch=rv64gc"
+// CHECK: resolver_else:
+// CHECK-NEXT: ret ptr @_Z4foo1v.default
+//
+//
+// CHECK-LABEL: define dso_local noundef signext i32 @_Z4foo2v.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 2
+//
+//
+// CHECK-LABEL: define weak_odr ptr @_Z4foo2v.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB1]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"_Z4foo2v.arch=+zbb"
+// CHECK: resolver_else:
+// CHECK-NEXT: ret ptr @_Z4foo2v.default
+//
+//
+// CHECK-LABEL: define dso_local noundef signext i32 @_Z4foo3v.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 3
+//
+//
+// CHECK-LABEL: define weak_odr ptr @_Z4foo3v.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB2]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"_Z4foo3v.arch=+zbb,+c"
+// CHECK: resolver_else:
+// CHECK-NEXT: ret ptr @_Z4foo3v.default
+//
+//
+// CHECK-LABEL: define dso_local noundef signext i32 @_Z4foo4v.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 4
+//
+//
+// CHECK-LABEL: define weak_odr ptr @_Z4foo4v.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: [[TMP0:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB3]])
+// CHECK-NEXT: br i1 [[TMP0]], label [[RESOLVER_RETURN:%.*]], label
[[RESOLVER_ELSE:%.*]]
+// CHECK: resolver_return:
+// CHECK-NEXT: ret ptr @"_Z4foo4v.arch=rv64gc"
+// CHECK: resolver_else:
+// CHECK-NEXT: [[TMP1:%.*]] = call i1 @__riscv_ifunc_select(ptr @[[GLOB4]])
+// CHECK-NEXT: br i1 [[TMP1]], label [[RESOLVER_RETURN1:%.*]], label
[[RESOLVER_ELSE2:%.*]]
+// CHECK: resolver_return1:
+// CHECK-NEXT: ret ptr @"_Z4foo4v.arch=+zbb,+v"
+// CHECK: resolver_else2:
+// CHECK-NEXT: ret ptr @_Z4foo4v.default
+//
+//
+// CHECK-LABEL: define dso_local noundef signext i32 @_Z4foo5v.default(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: ret i32 5
+//
+//
+// CHECK-LABEL: define weak_odr ptr @_Z4foo5v.resolver() comdat {
+// CHECK-NEXT: resolver_entry:
+// CHECK-NEXT: ret ptr @_Z4foo5v.default
+//
+//
+// CHECK-LABEL: define dso_local noundef signext i32 @_Z3barv(
+// CHECK-SAME: ) #[[ATTR0]] {
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[CALL:%.*]] = call noundef signext i32 @_Z4foo1v()
+// CHECK-NEXT: [[CALL1:%.*]] = call noundef signext i32 @_Z4foo2v()
+// CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[CALL]], [[CALL1]]
+// CHECK-NEXT: [[CALL2:%.*]] = call noundef signext i32 @_Z4foo3v()
+// CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[ADD]], [[CALL2]]
+// CHECK-NEXT: [[CALL4:%.*]] = call noundef signext i32 @_Z4foo4v()
+// CHECK-NEXT: [[ADD5:%.*]] = add nsw i32 [[ADD3]], [[CALL4]]
+// CHECK-NEXT: ret i32 [[ADD5]]
+//
+//.
+// CHECK: attributes #[[ATTR0]] = { mustprogress noinline nounwind optnone
"no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+i,+m" }
+// CHECK: attributes #[[ATTR1:[0-9]+]] = { mustprogress noinline nounwind
optnone "no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+a,+c,+d,+f,+m,+zicsr,+zifencei,-e,-experimental-smmpm,-experimental-smnpm,-experimental-ssnpm,-experimental-sspm,-experimental-ssqosid,-experimental-supm,-experimental-zaamo,-experimental-zabha,-experimental-zalasr,-experimental-zalrsc,-experimental-zcmop,-experimental-zfbfmin,-experimental-zicfilp,-experimental-zicfiss,-experimental-zimop,-experimental-ztso,-experimental-zvfbfmin,-experimental-zvfbfwma,-h,-shcounterenw,-shgatpa,-shtvala,-shvsatpa,-shvstvala,-shvstvecd,-smaia,-smepmp,-ssaia,-ssccptr,-sscofpmf,-sscounterenw,-ssstateen,-ssstrict,-sstc,-sstvala,-sstvecd,-ssu64xl,-svade,-svadu,-svbare,-svinval,-svnapot,-svpbmt,-v,-xcvalu,-xcvbi,-xcvbitmanip,-xcvelw,-xcvmac,-xcvmem,-xcvsimd,-xsfcease,-xsfvcp,-xsfvfnrclipxfqf,-xsfvfwmaccqqq,-xsfvqmaccdod,-xsfvqmaccqoq,-xsifivecdiscarddlone,-xsifivecflushdlone,-xtheadba,-xtheadbb,-xtheadbs,-xtheadcmo,-xtheadcondmov,-xtheadfmemidx,-xtheadmac,-xtheadmemidx,-xtheadmempair,-xtheadsync,-xtheadvdot,-xventanacondops,-za128rs,-za64rs,-zacas,-zawrs,-zba,-zbb,-zbc,-zbkb,-zbkc,-zbkx,-zbs,-zca,-zcb,-zcd,-zce,-zcf,-zcmp,-zcmt,-zdinx,-zfa,-zfh,-zfhmin,-zfinx,-zhinx,-zhinxmin,-zic64b,-zicbom,-zicbop,-zicboz,-ziccamoa,-ziccif,-zicclsm,-ziccrse,-zicntr,-zicond,-zihintntl,-zihintpause,-zihpm,-zk,-zkn,-zknd,-zkne,-zknh,-zkr,-zks,-zksed,-zksh,-zkt,-zmmul,-zvbb,-zvbc,-zve32f,-zve32x,-zve64d,-zve64f,-zve64x,-zvfh,-zvfhmin,-zvkb,-zvkg,-zvkn,-zvknc,-zvkned,-zvkng,-zvknha,-zvknhb,-zvks,-zvksc,-zvksed,-zvksg,-zvksh,-zvkt,-zvl1024b,-zvl128b,-zvl16384b,-zvl2048b,-zvl256b,-zvl32768b,-zvl32b,-zvl4096b,-zvl512b,-zvl64b,-zvl65536b,-zvl8192b"
}
+// CHECK: attributes #[[ATTR2:[0-9]+]] = { mustprogress noinline nounwind
optnone "no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+i,+m,+zbb" }
+// CHECK: attributes #[[ATTR3:[0-9]+]] = { mustprogress noinline nounwind
optnone "no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+c,+i,+m,+zbb" }
+// CHECK: attributes #[[ATTR4:[0-9]+]] = { mustprogress noinline nounwind
optnone "no-trapping-math"="true" "stack-protector-buffer-size"="8"
"target-features"="+64bit,+d,+f,+i,+m,+v,+zbb,+zicsr,+zve32f,+zve32x,+zve64d,+zve64f,+zve64x,+zvl128b,+zvl32b,+zvl64b"
}
+//.
+// CHECK: [[META0:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
+// CHECK: [[META1:![0-9]+]] = !{i32 1, !"target-abi", !"lp64"}
+// CHECK: [[META2:![0-9]+]] = !{i32 6, !"riscv-isa", [[META3:![0-9]+]]}
+// CHECK: [[META3]] = !{!"rv64i2p1_m2p0"}
+// CHECK: [[META4:![0-9]+]] = !{i32 8, !"SmallDataLimit", i32 0}
+// CHECK: [[META5:![0-9]+]] = !{!"{{.*}}clang version {{.*}}"}
+//.
diff --git a/clang/test/SemaCXX/attr-target-clones-riscv.cpp
b/clang/test/SemaCXX/attr-target-clones-riscv.cpp
new file mode 100644
index 00000000000000..a1f7cfb47aee2f
--- /dev/null
+++ b/clang/test/SemaCXX/attr-target-clones-riscv.cpp
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -triple riscv64-linux-gnu -fsyntax-only -verify
-fexceptions -fcxx-exceptions %s -std=c++14
+
+// expected-warning@+1 {{unsupported 'mcpu=sifive-u74' in the 'target_clones'
attribute string; 'target_clones' attribute ignored}}
+void __attribute__((target_clones("default", "mcpu=sifive-u74"))) mcpu() {}
+
+// expected-warning@+1 {{unsupported 'mtune=sifive-u74' in the 'target_clones'
attribute string; 'target_clones' attribute ignored}}
+void __attribute__((target_clones("default", "mtune=sifive-u74"))) mtune() {}
+
+// expected-warning@+1 {{version list contains duplicate entries}}
+void __attribute__((target_clones("default", "arch=+c", "arch=+c")))
dupVersion() {}
+
+void lambda() {
+ // expected-error@+1 {{attribute 'target_clones' multiversioned functions do
not yet support lambdas}}
+ auto x = []() __attribute__((target_clones("default"))){};
+ x();
+ // expected-error@+1 {{attribute 'target_clones' multiversioned functions do
not yet support lambdas}}
+ auto y = []() __attribute__((target_clones("arch=rv64gc", "default"))){};
+ y();
+}
>From f3e89fa28507c2e3ac9234a0add29a3c6742f1eb Mon Sep 17 00:00:00 2001
From: Piyou Chen <piyou.c...@sifive.com>
Date: Wed, 20 Mar 2024 23:50:53 -0700
Subject: [PATCH 2/2] More Sema testcase
---
clang/test/SemaCXX/attr-target-clones-riscv.cpp | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/clang/test/SemaCXX/attr-target-clones-riscv.cpp
b/clang/test/SemaCXX/attr-target-clones-riscv.cpp
index a1f7cfb47aee2f..4e5e8546e21f35 100644
--- a/clang/test/SemaCXX/attr-target-clones-riscv.cpp
+++ b/clang/test/SemaCXX/attr-target-clones-riscv.cpp
@@ -9,6 +9,15 @@ void __attribute__((target_clones("default",
"mtune=sifive-u74"))) mtune() {}
// expected-warning@+1 {{version list contains duplicate entries}}
void __attribute__((target_clones("default", "arch=+c", "arch=+c")))
dupVersion() {}
+// expected-warning@+1 {{unsupported '' in the 'target_clones' attribute
string; 'target_clones' attribute ignored}}
+void __attribute__((target_clones("default", ""))) emptyVersion() {}
+
+// expected-error@+1 {{'target_clones' multiversioning requires a default
target}}
+void __attribute__((target_clones("arch=+c"))) withoutDefault() {}
+
+// expected-warning@+1 {{unsupported '+c' in the 'target_clones' attribute
string; 'target_clones' attribute ignored}}
+void __attribute__((target_clones("default", "+c"))) invaildVersion() {}
+
void lambda() {
// expected-error@+1 {{attribute 'target_clones' multiversioned functions do
not yet support lambdas}}
auto x = []() __attribute__((target_clones("default"))){};
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