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[UBSAN] Preserve ubsan code with ubsan-unique-traps #83470

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[UBSAN] Preserve ubsan code with ubsan-unique-traps #83470

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8 changes: 3 additions & 5 deletions clang/lib/CodeGen/CGExpr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3826,11 +3826,9 @@ void CodeGenFunction::EmitTrapCheck(llvm::Value *Checked,
Builder.CreateCondBr(Checked, Cont, TrapBB);
EmitBlock(TrapBB);

llvm::CallInst *TrapCall = Builder.CreateCall(
CGM.getIntrinsic(llvm::Intrinsic::ubsantrap),
llvm::ConstantInt::get(CGM.Int8Ty, ClSanitizeDebugDeoptimization
? TrapBB->getParent()->size()
: CheckHandlerID));
llvm::CallInst *TrapCall =
Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::ubsantrap),
llvm::ConstantInt::get(CGM.Int8Ty, CheckHandlerID));

if (!CGM.getCodeGenOpts().TrapFuncName.empty()) {
auto A = llvm::Attribute::get(getLLVMContext(), "trap-func-name",
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4 changes: 2 additions & 2 deletions clang/test/CodeGen/bounds-checking.c
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Original file line number Diff line number Diff line change
Expand Up @@ -74,11 +74,11 @@ char B2[10];
// CHECK-LABEL: @f8
void f8(int i, int k) {
// NOOPTLOCAL: call void @llvm.ubsantrap(i8 3)
// NOOPTARRAY: call void @llvm.ubsantrap(i8 2)
// NOOPTARRAY: call void @llvm.ubsantrap(i8 18)
B[i] = '\0';

// NOOPTLOCAL: call void @llvm.ubsantrap(i8 5)
// NOOPTARRAY: call void @llvm.ubsantrap(i8 4)
// NOOPTARRAY: call void @llvm.ubsantrap(i8 18)
B2[k] = '\0';
}

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