Use the MS ABI for Win32 targets by default

In addition to being a sensible default, this is a huge improvement
in test coverage for the MS ABI: any bot that targets Win32 will
now run the test suite using the MS ABI by default.

Differential Revision: http://llvm-reviews.chandlerc.com/D2401

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@199131 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index dc4aad74b9463fd844fe560492e02bab07d88467..131f5e8d94cb925bf49a8aa3e40d9c2d9cb7d392 100644 (file)
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -1628,9 +1628,12 @@ static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
   // Use the default target triple if unspecified.
   if (Opts.Triple.empty())
     Opts.Triple = llvm::sys::getDefaultTargetTriple();
-}
 
-//
+  // Use the MS ABI for Win32 targets unless otherwise specified.
+  if (Opts.CXXABI.empty() &&
+      llvm::Triple(Opts.Triple).getOS() == llvm::Triple::Win32)
+    Opts.CXXABI = "microsoft";
+}
 
 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
                                         const char *const *ArgBegin,