5 files changed, 19 insertions, 3 deletions
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index fb58739896..3717b12b15 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2475,6 +2475,12 @@ TargetInfo *TargetInfo::CreateTargetInfo(Diagnostic &Diags,
     return 0;
   }
 
+  // Set the target C++ ABI.
+  if (!Target->setCXXABI(Opts.CXXABI)) {
+    Diags.Report(diag::err_target_unknown_cxxabi) << Opts.CXXABI;
+    return 0;
+  }
+
   // Compute the default target features, we need the target to handle this
   // because features may have dependencies on one another.
   llvm::StringMap<bool> Features;
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 90abd439b1..880d5372bf 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -86,8 +86,10 @@ void CodeGenModule::createObjCRuntime() {
 }
 
 void CodeGenModule::createCXXABI() {
-  // For now, just create an Itanium ABI.
-  ABI = CreateItaniumCXXABI(*this);
+  if (Context.Target.getCXXABI() == "microsoft")
+    ABI = CreateMicrosoftCXXABI(*this);
+  else
+    ABI = CreateItaniumCXXABI(*this);
 }
 
 void CodeGenModule::Release() {
diff --git a/lib/CodeGen/MicrosoftCXXABI.cpp b/lib/CodeGen/MicrosoftCXXABI.cpp
index cf809991de..d391651fac 100644
--- a/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -124,7 +124,7 @@ void MicrosoftMangleContext::mangleCXXDtor(const CXXDestructorDecl *D,
   assert(false && "Can't yet mangle destructors!");
 }
 
-CXXABI *CreateMicrosoftCXXABI(CodeGenModule &CGM) {
+CXXABI *clang::CodeGen::CreateMicrosoftCXXABI(CodeGenModule &CGM) {
   return new MicrosoftCXXABI(CGM);
 }
 
diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index 68e7ac17ea..314e253f12 100644
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -219,6 +219,7 @@ ASTUnit *ASTUnit::LoadFromPCHFile(const std::string &Filename,
   // FIXME: This is broken, we should store the TargetOptions in the PCH.
   TargetOptions TargetOpts;
   TargetOpts.ABI = "";
+  TargetOpts.CXXABI = "itanium";
   TargetOpts.CPU = "";
   TargetOpts.Features.clear();
   TargetOpts.Triple = TargetTriple;
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 4d7f839bdc..9bc8b76de8 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -680,6 +680,8 @@ static void TargetOptsToArgs(const TargetOptions &Opts,
     Res.push_back("-target-abi");
     Res.push_back(Opts.ABI);
   }
+  Res.push_back("-cxx-abi");
+  Res.push_back(Opts.CXXABI);
   for (unsigned i = 0, e = Opts.Features.size(); i != e; ++i) {
     Res.push_back("-target-feature");
     Res.push_back(Opts.Features[i]);
@@ -1367,6 +1369,7 @@ static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
 static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
   using namespace cc1options;
   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
+  Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
   Opts.Triple = Args.getLastArgValue(OPT_triple);
   Opts.Features = Args.getAllArgValues(OPT_target_feature);
@@ -1374,6 +1377,10 @@ static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
   // Use the host triple if unspecified.
   if (Opts.Triple.empty())
     Opts.Triple = llvm::sys::getHostTriple();
+
+  // Use the Itanium C++ ABI if unspecified.
+  if (Opts.CXXABI.empty())
+    Opts.CXXABI = "itanium";
 }
 
 //