r276869 - [ARM] Pass thumb as architecture to the underlying tools, when targeting windows

[Renato Golin via cfe-commits]

Author: rengolin
Date: Wed Jul 27 09:12:20 2016
New Revision: 276869

URL: http://llvm.org/viewvc/llvm-project?rev=276869&view=rev
Log:
[ARM] Pass thumb as architecture to the underlying tools, when targeting windows

This makes sure that the thumb section flag gets set by the assembler.

Patch by Martin Storsjö.

Added:
    cfe/trunk/test/Driver/windows-thumb.s
Modified:
    cfe/trunk/lib/Driver/ToolChain.cpp

Modified: cfe/trunk/lib/Driver/ToolChain.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChain.cpp?rev=276869&r1=276868&r2=276869&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChain.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChain.cpp Wed Jul 27 09:12:20 2016
@@ -493,8 +493,10 @@ std::string ToolChain::ComputeLLVMTriple
       ArchName = "arm";
 
     // Assembly files should start in ARM mode, unless arch is M-profile.
+    // Windows is always thumb.
     if ((InputType != types::TY_PP_Asm && Args.hasFlag(options::OPT_mthumb,
-         options::OPT_mno_thumb, ThumbDefault)) || IsMProfile) {
+         options::OPT_mno_thumb, ThumbDefault)) || IsMProfile ||
+         getTriple().isOSWindows()) {
       if (IsBigEndian)
         ArchName = "thumbeb";
       else

Added: cfe/trunk/test/Driver/windows-thumb.s
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/windows-thumb.s?rev=276869&view=auto
==============================================================================
--- cfe/trunk/test/Driver/windows-thumb.s (added)
+++ cfe/trunk/test/Driver/windows-thumb.s Wed Jul 27 09:12:20 2016
@@ -0,0 +1,2 @@
+; RUN: %clang -target armv7-windows -c -### %s 2>&1 | FileCheck %s
+; CHECK: "-triple" "thumbv7-