[PATCH] clang: forward -no-integrated-as from the driver

[Saleem Abdulrasool]

Hi nlewycky, rafael,

Forward the -no-integrated-as option to -cc1 rather than simply invoking the
appropriate tool.  This is useful since this option has been overloaded to
permit disabling of parsing inline assembly at the MC layer.

http://llvm-reviews.chandlerc.com/D2852

Files:
  lib/Driver/Tools.cpp
  test/Driver/no-integrated-as.c

Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -2509,12 +2509,17 @@
 
   // Decide whether to use verbose asm. Verbose assembly is the default on
   // toolchains which have the integrated assembler on by default.
-  bool IsVerboseAsmDefault = getToolChain().IsIntegratedAssemblerDefault();
+  bool IsIntegratedAssemblerDefault =
+      getToolChain().IsIntegratedAssemblerDefault();
   if (Args.hasFlag(options::OPT_fverbose_asm, options::OPT_fno_verbose_asm,
-                   IsVerboseAsmDefault) ||
+                   IsIntegratedAssemblerDefault) ||
       Args.hasArg(options::OPT_dA))
     CmdArgs.push_back("-masm-verbose");
 
+  if (!Args.hasFlag(options::OPT_integrated_as, options::OPT_no_integrated_as,
+                    IsIntegratedAssemblerDefault))
+    CmdArgs.push_back("-no-integrated-as");
+
   if (Args.hasArg(options::OPT_fdebug_pass_structure)) {
     CmdArgs.push_back("-mdebug-pass");
     CmdArgs.push_back("Structure");
Index: test/Driver/no-integrated-as.c
===================================================================
--- /dev/null
+++ test/Driver/no-integrated-as.c
@@ -0,0 +1,10 @@
+// RUN: %clang -triple i386 -### -no-integrated-as %s 2>&1 \
+//          | FileCheck %s -check-prefix NOIAS
+// RUN: %clang -triple i386 -### -integrated-as %s 2>&1 \
+//          | FileCheck %s -check-prefix IAS
+// RUN: %clang -triple i386 -### %s 2>&1 | FileCheck %s -check-prefix DEFAULT
+
+// NOIAS: -no-integrated-as
+// IAS-NOT: -no-integrated-as
+// DEFAULT-NOT: -no-integrated-as
+
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