Adding option -fno-inline-asm to disallow inline asm

Summary:
This patch add a new option to dis-allow all inline asm.
Any GCC style inline asm will be reported as an error.

Reviewers: rnk, echristo

Reviewed By: rnk, echristo

Subscribers: bob.wilson, rnk, echristo, rsmith, cfe-commits

Differential Revision: http://reviews.llvm.org/D6870

llvm-svn: 226340
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 54025b0..921a0d2 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1563,6 +1563,7 @@
       Args.getLastArgValue(OPT_fmodule_implementation_of);
   Opts.NativeHalfType = Opts.NativeHalfType;
   Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns);
+  Opts.GNUAsm = !Args.hasArg(OPT_fno_gnu_inline_asm);
 
   if (!Opts.CurrentModule.empty() && !Opts.ImplementationOfModule.empty() &&
       Opts.CurrentModule != Opts.ImplementationOfModule) {