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[NFCI][metadata][clang] Use create{Unlikely,Likely}BranchWeights #89467

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Merged
merged 5 commits into from
Jun 10, 2024
Merged

[NFCI][metadata][clang] Use create{Unlikely,Likely}BranchWeights #89467

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49d0afd
[𝘀𝗽𝗿] changes to main this commit is based on
vitalybuka Apr 19, 2024
203b897
[𝘀𝗽𝗿] initial version
vitalybuka Apr 19, 2024
c97c1bf
[𝘀𝗽𝗿] changes introduced through rebase
vitalybuka Apr 20, 2024
01976a1
rebase
vitalybuka Apr 20, 2024
66542e2
rebase
vitalybuka Jun 10, 2024
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5 changes: 2 additions & 3 deletions clang/lib/CodeGen/CGExpr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3571,9 +3571,8 @@ void CodeGenFunction::EmitCheck(
llvm::BasicBlock *Handlers = createBasicBlock("handler." + CheckName);
llvm::Instruction *Branch = Builder.CreateCondBr(JointCond, Cont, Handlers);
// Give hint that we very much don't expect to execute the handler
// Value chosen to match UR_NONTAKEN_WEIGHT, see BranchProbabilityInfo.cpp
llvm::MDBuilder MDHelper(getLLVMContext());
llvm::MDNode *Node = MDHelper.createBranchWeights((1U << 20) - 1, 1);
llvm::MDNode *Node = MDHelper.createLikelyBranchWeights();
Branch->setMetadata(llvm::LLVMContext::MD_prof, Node);
EmitBlock(Handlers);

Expand Down Expand Up @@ -3641,7 +3640,7 @@ void CodeGenFunction::EmitCfiSlowPathCheck(
llvm::BranchInst *BI = Builder.CreateCondBr(Cond, Cont, CheckBB);

llvm::MDBuilder MDHelper(getLLVMContext());
llvm::MDNode *Node = MDHelper.createBranchWeights((1U << 20) - 1, 1);
llvm::MDNode *Node = MDHelper.createLikelyBranchWeights();
BI->setMetadata(llvm::LLVMContext::MD_prof, Node);

EmitBlock(CheckBB);
Expand Down
3 changes: 1 addition & 2 deletions clang/lib/CodeGen/CGExprComplex.cpp
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Expand Up @@ -856,8 +856,7 @@ ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) {
llvm::BasicBlock *OrigBB = Branch->getParent();

// Give hint that we very much don't expect to see NaNs.
// Value chosen to match UR_NONTAKEN_WEIGHT, see BranchProbabilityInfo.cpp
llvm::MDNode *BrWeight = MDHelper.createBranchWeights(1, (1U << 20) - 1);
llvm::MDNode *BrWeight = MDHelper.createUnlikelyBranchWeights();
Branch->setMetadata(llvm::LLVMContext::MD_prof, BrWeight);

// Now test the imaginary part and create its branch.
Expand Down
4 changes: 2 additions & 2 deletions clang/lib/CodeGen/CGObjCGNU.cpp
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Expand Up @@ -2069,7 +2069,7 @@ class CGObjCGNUstep2 : public CGObjCGNUstep {

Builder.CreateCondBr(Builder.CreateICmpEQ(selfValue, Zero),
SelfIsNilBlock, ContBlock,
MDHelper.createBranchWeights(1, 1 << 20));
MDHelper.createUnlikelyBranchWeights());

CGF.EmitBlock(SelfIsNilBlock);

Expand Down Expand Up @@ -2104,7 +2104,7 @@ class CGObjCGNUstep2 : public CGObjCGNUstep {
CGF.createBasicBlock("objc_direct_method.class_initialized");
Builder.CreateCondBr(Builder.CreateICmpEQ(isInitialized, Zeros[0]),
notInitializedBlock, initializedBlock,
MDHelper.createBranchWeights(1, 1 << 20));
MDHelper.createUnlikelyBranchWeights());
CGF.EmitBlock(notInitializedBlock);
Builder.SetInsertPoint(notInitializedBlock);
CGF.EmitRuntimeCall(SentInitializeFn, selfValue);
Expand Down
2 changes: 1 addition & 1 deletion clang/lib/CodeGen/CGObjCMac.cpp
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Expand Up @@ -4072,7 +4072,7 @@ void CGObjCCommonMac::GenerateDirectMethodPrologue(

llvm::MDBuilder MDHelper(CGM.getLLVMContext());
Builder.CreateCondBr(Builder.CreateICmpEQ(selfValue, Zero), SelfIsNilBlock,
ContBlock, MDHelper.createBranchWeights(1, 1 << 20));
ContBlock, MDHelper.createUnlikelyBranchWeights());

CGF.EmitBlock(SelfIsNilBlock);

Expand Down
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