[cfe-commits] r161780 - in /cfe/trunk: lib/Sema/SemaStmt.cpp test/CodeGen/ms-inline-asm.c

[Richard Smith]

On Mon, Aug 13, 2012 at 1:32 PM, Chad Rosier <mcrosier at apple.com> wrote:

> Author: mcrosier
> Date: Mon Aug 13 15:32:07 2012
> New Revision: 161780
>
> URL: http://llvm.org/viewvc/llvm-project?rev=161780&view=rev
> Log:
> [ms-inline asm] Have patchMSAsmStrings() return a vector or AsmStrings.
>
> The AsmParser expects a single asm instruction, but valid ms-style inline
> asm
> statements may contain  multiple instructions.
>
> This happens with asm blocks
>
> __asm {
>   mov ebx, eax
>   mov ecx, ebx
> }
>
> or when multiple asm statements are adjacent to one another
>
> __asm mov ebx, eax
> __asm mov ecx, ebx
>
> and
>
> __asm mov ebx, eax __asm mov ecx, ebx
>
> Currently, asm blocks are not properly handled.
>
> Modified:
>     cfe/trunk/lib/Sema/SemaStmt.cpp
>     cfe/trunk/test/CodeGen/ms-inline-asm.c
>
> Modified: cfe/trunk/lib/Sema/SemaStmt.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaStmt.cpp?rev=161780&r1=161779&r2=161780&view=diff
>
> ==============================================================================
> --- cfe/trunk/lib/Sema/SemaStmt.cpp (original)
> +++ cfe/trunk/lib/Sema/SemaStmt.cpp Mon Aug 13 15:32:07 2012
> @@ -2921,29 +2935,32 @@
>    const std::string &TT = Context.getTargetInfo().getTriple().getTriple();
>    const llvm::Target *TheTarget(llvm::TargetRegistry::lookupTarget(TT,
> Error));
>
> -  llvm::SourceMgr SrcMgr;
> -  llvm::MemoryBuffer *Buffer =
> -    llvm::MemoryBuffer::getMemBuffer(PatchedAsmString, "<inline asm>");
> -
> -  // Tell SrcMgr about this buffer, which is what the parser will pick up.
> -  SrcMgr.AddNewSourceBuffer(Buffer, llvm::SMLoc());
> -
>    OwningPtr<llvm::MCAsmInfo> MAI(TheTarget->createMCAsmInfo(TT));
>    OwningPtr<llvm::MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TT));
>    OwningPtr<llvm::MCObjectFileInfo> MOFI(new llvm::MCObjectFileInfo());
> -  llvm::MCContext Ctx(*MAI, *MRI, MOFI.get(), &SrcMgr);
>    OwningPtr<llvm::MCSubtargetInfo>
>      STI(TheTarget->createMCSubtargetInfo(TT, "", ""));
>
> -  OwningPtr<llvm::MCStreamer> Str;
> -  OwningPtr<llvm::MCAsmParser>
> -    Parser(createMCAsmParser(SrcMgr, Ctx, *Str.get(), *MAI));
> -  OwningPtr<llvm::MCTargetAsmParser>
> -    TargetParser(TheTarget->createMCAsmParser(*STI, *Parser));
> -
> -  // Change to the Intel dialect.
> -  Parser->setAssemblerDialect(1);
> -  Parser->setTargetParser(*TargetParser.get());
> +  for (unsigned i = 0, e = PatchedAsmStrings.size(); i != e; ++i) {
> +    llvm::SourceMgr SrcMgr;
> +    llvm::MCContext Ctx(*MAI, *MRI, MOFI.get(), &SrcMgr);
> +    llvm::MemoryBuffer *Buffer =
> +      llvm::MemoryBuffer::getMemBuffer(PatchedAsmStrings[i], "<inline
> asm>");
> +
> +    // Tell SrcMgr about this buffer, which is what the parser will pick
> up.
> +    SrcMgr.AddNewSourceBuffer(Buffer, llvm::SMLoc());
> +
> +    OwningPtr<llvm::MCStreamer> Str;
> +    OwningPtr<llvm::MCAsmParser>
> +      Parser(createMCAsmParser(SrcMgr, Ctx, *Str.get(), *MAI));
>

Str.get() is a null pointer here.
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