Support -masm= flag for x86 assembly targets.

For assembly files without .intel_syntax or .att_syntax directives, allow the
-masm= flag to supply a default assembly dialect. For example,

C:\TMP> type intel.s
.text
mov al,0

C:\TMP> clang -masm=intel -c intel.s

Without this patch, one would need to pass an "-mllvm -x86-asm-syntax=" flag
directly to the backend.
C:\TMP> clang -mllvm --x86-asm-syntax=intel -c intel.s

Differentials Review: http://reviews.llvm.org/D22285

llvm-svn: 275877

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Driver/Tools.h b/clang/lib/Driver/Tools.h
index 02bdb8e5e2d..6577ce92b92 100644
--- a/clang/lib/Driver/Tools.h
+++ b/clang/lib/Driver/Tools.h
@@ -125,6 +125,8 @@ public:
       : Tool("clang::as", "clang integrated assembler", TC, RF_Full) {}
   void AddMIPSTargetArgs(const llvm::opt::ArgList &Args,
                          llvm::opt::ArgStringList &CmdArgs) const;
+  void AddX86TargetArgs(const llvm::opt::ArgList &Args,
+                        llvm::opt::ArgStringList &CmdArgs) const;
   bool hasGoodDiagnostics() const override { return true; }
   bool hasIntegratedAssembler() const override { return false; }
   bool hasIntegratedCPP() const override { return false; }