diff options
| -rw-r--r-- | lib/CodeGen/CodeGenModule.cpp | 18 | ||||
| -rw-r--r-- | test/CodeGen/asm-label.c | 12 |
2 files changed, 26 insertions, 4 deletions
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp index e4b3210d1e..7cee6b4565 100644 --- a/lib/CodeGen/CodeGenModule.cpp +++ b/lib/CodeGen/CodeGenModule.cpp @@ -1574,14 +1574,24 @@ llvm::Value *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD, "isn't a lib fn"); // Get the name, skip over the __builtin_ prefix (if necessary). - const char *Name = Context.BuiltinInfo.GetName(BuiltinID); - if (Context.BuiltinInfo.isLibFunction(BuiltinID)) - Name += 10; + llvm::StringRef Name; + GlobalDecl D(FD); + + // If the builtin has been declared explicitly with an assembler label, + // use the mangled name. This differs from the plain label on platforms + // that prefix labels. + if (const AsmLabelAttr *ALA = FD->getAttr<AsmLabelAttr>()) + Name = getMangledName(D); + else if (Context.BuiltinInfo.isLibFunction(BuiltinID)) + Name = Context.BuiltinInfo.GetName(BuiltinID) + 10; + else + Name = Context.BuiltinInfo.GetName(BuiltinID); + const llvm::FunctionType *Ty = cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType())); - return GetOrCreateLLVMFunction(Name, Ty, GlobalDecl(FD), /*ForVTable=*/false); + return GetOrCreateLLVMFunction(Name, Ty, D, /*ForVTable=*/false); } llvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys, diff --git a/test/CodeGen/asm-label.c b/test/CodeGen/asm-label.c new file mode 100644 index 0000000000..7be2ad3cc7 --- /dev/null +++ b/test/CodeGen/asm-label.c @@ -0,0 +1,12 @@ +// RUN: %clang_cc1 -triple=i686-pc-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=LINUX +// RUN: %clang_cc1 -triple=i686-apple-darwin9 -emit-llvm %s -o - | FileCheck %s --check-prefix=DARWIN + +char *strerror(int) asm("alias"); + +void test(void) +{ + strerror(-1); +} + +// LINUX: declare i8* @alias(i32) +// DARWIN: declare i8* @"\01alias"(i32) |