Allow overriding -fno-gnu-inline-assembly

lib/Driver/Tools.cpp

 //===--- Tools.cpp - Tools Implementations --------------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "Tools.h"
@@ skipping 1752 matching lines @@
     CmdArgs.push_back ("-enable-hexagon-ieee-rnd-near");
   }
   CmdArgs.push_back ("-mllvm");
   CmdArgs.push_back ("-machine-sink-split=0");
 }
 
 void Clang::AddLe32TargetArgs(const ArgList &Args,
                               ArgStringList &CmdArgs) const {
   Args.ClaimAllArgs(options::OPT_emit_obj);
 
-  CmdArgs.push_back("-fno-gnu-inline-asm");
+  // -fno-gnu-inline-asm is default.
+  if (!Args.hasFlag(options::OPT_fgnu_inline_asm,
+                    options::OPT_fno_gnu_inline_asm, false))
+    CmdArgs.push_back("-fno-gnu-inline-asm");
 }
 
 // Decode AArch64 features from string like +[no]featureA+[no]featureB+...
 static bool DecodeAArch64Features(const Driver &D, StringRef text,
                                   std::vector<const char *> &Features) {
   SmallVector<StringRef, 8> Split;
   text.split(Split, StringRef("+"), -1, false);
 
   for (unsigned I = 0, E = Split.size(); I != E; ++I) {
     const char *result = llvm::StringSwitch<const char *>(Split[I])
@@ skipping 7335 matching lines @@
       CmdArgs.push_back("-lmsvcrt");
       AddRunTimeLibs(TC, D, CmdArgs, Args);
     }
   }
 
   const std::string Linker = TC.GetProgramPath("ld");
   Exec = Args.MakeArgString(Linker);
 
   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs));
 }