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a ridiculous amount of propagation through the backend later,

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have the code generate slap a srcloc metadata on inline asm nodes.
This allows us to diagnose invalid inline asms with such nice 
diagnostics as:

<inline asm>:1:2: error: unrecognized instruction
        abc incl    %eax
        ^
asm.c:2:12: note: generated from here
  __asm__ ("abc incl    %0" : "+r" (X));
           ^
2 diagnostics generated.

llvm-svn: 100608
This commit is contained in:
Chris Lattner
2010-04-07 05:46:54 +00:00
parent 51065568cd
commit fdb76ccfb4
1 changed files with 9 additions and 2 deletions
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11
clang/lib/CodeGen/CGStmt.cpp
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@@ -1044,9 +1044,10 @@ void CodeGenFunction::EmitAsmStmt(const AsmStmt &S) {
// Use ptrtoint as appropriate so that we can do our extension.
if (isa<llvm::PointerType>(Arg->getType()))
Arg = Builder.CreatePtrToInt(Arg,
llvm::IntegerType::get(VMContext, LLVMPointerWidth));
llvm::IntegerType::get(VMContext, LLVMPointerWidth));
unsigned OutputSize = (unsigned)getContext().getTypeSize(OutputTy);
Arg = Builder.CreateZExt(Arg, llvm::IntegerType::get(VMContext, OutputSize));
Arg = Builder.CreateZExt(Arg,
llvm::IntegerType::get(VMContext, OutputSize));
}
}
@@ -1102,6 +1103,12 @@ void CodeGenFunction::EmitAsmStmt(const AsmStmt &S) {
llvm::CallInst *Result = Builder.CreateCall(IA, Args.begin(), Args.end());
Result->addAttribute(~0, llvm::Attribute::NoUnwind);
// Slap the source location of the inline asm into a !srcloc metadata on the
// call.
unsigned LocID = S.getAsmString()->getLocStart().getRawEncoding();
llvm::Value *LocIDC =
llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LocID);
Result->setMetadata("srcloc", llvm::MDNode::get(VMContext, &LocIDC, 1));
// Extract all of the register value results from the asm.
std::vector<llvm::Value*> RegResults;