Attach attribute "trap-func-name" to call sites of llvm.trap and llvm.debugtrap.
This is needed to use clang's command line option "-ftrap-function" for LTO and
enable changing the trap function name on a per-call-site basis.
rdar://problem/21225723
Differential Revision: http://reviews.llvm.org/D10831
llvm-svn: 241306
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 1a76afa..175763c 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -2403,8 +2403,7 @@
TrapBB = createBasicBlock("trap");
Builder.CreateCondBr(Checked, Cont, TrapBB);
EmitBlock(TrapBB);
- llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::trap);
- llvm::CallInst *TrapCall = Builder.CreateCall(F, {});
+ llvm::CallInst *TrapCall = EmitTrapCall(llvm::Intrinsic::trap);
TrapCall->setDoesNotReturn();
TrapCall->setDoesNotThrow();
Builder.CreateUnreachable();
@@ -2415,6 +2414,18 @@
EmitBlock(Cont);
}
+llvm::CallInst *CodeGenFunction::EmitTrapCall(llvm::Intrinsic::ID IntrID) {
+ llvm::CallInst *TrapCall =
+ Builder.CreateCall(CGM.getIntrinsic(IntrID), {});
+
+ if (!CGM.getCodeGenOpts().TrapFuncName.empty())
+ TrapCall->addAttribute(llvm::AttributeSet::FunctionIndex,
+ "trap-func-name",
+ CGM.getCodeGenOpts().TrapFuncName);
+
+ return TrapCall;
+}
+
/// isSimpleArrayDecayOperand - If the specified expr is a simple decay from an
/// array to pointer, return the array subexpression.
static const Expr *isSimpleArrayDecayOperand(const Expr *E) {