3 files changed, 17 insertions, 0 deletions
diff --git a/clang/lib/AST/CXXABI.h b/clang/lib/AST/CXXABI.h
index 4b38d7afb6a..5326cd4826c 100644
--- a/clang/lib/AST/CXXABI.h
+++ b/clang/lib/AST/CXXABI.h
@@ -15,6 +15,8 @@
 #ifndef LLVM_CLANG_AST_CXXABI_H
 #define LLVM_CLANG_AST_CXXABI_H
 
+#include "clang/AST/Type.h"
+
 namespace clang {
 
 class ASTContext;
@@ -28,6 +30,9 @@ public:
   /// Returns the size of a member pointer in multiples of the target
   /// pointer size.
   virtual unsigned getMemberPointerSize(const MemberPointerType *MPT) const = 0;
+
+  /// Returns the default calling convention for C++ methods.
+  virtual CallingConv getDefaultMethodCallConv() const = 0;
 };
 
 /// Creates an instance of a C++ ABI class.
diff --git a/clang/lib/AST/ItaniumCXXABI.cpp b/clang/lib/AST/ItaniumCXXABI.cpp
index c3fa4666537..f5f5f438e76 100644
--- a/clang/lib/AST/ItaniumCXXABI.cpp
+++ b/clang/lib/AST/ItaniumCXXABI.cpp
@@ -35,6 +35,10 @@ public:
     if (Pointee->isFunctionType()) return 2;
     return 1;
   }
+
+  CallingConv getDefaultMethodCallConv() const {
+    return CC_C;
+  }
 };
 
 class ARMCXXABI : public ItaniumCXXABI {
diff --git a/clang/lib/AST/MicrosoftCXXABI.cpp b/clang/lib/AST/MicrosoftCXXABI.cpp
index 87b77673925..b1f032b897a 100644
--- a/clang/lib/AST/MicrosoftCXXABI.cpp
+++ b/clang/lib/AST/MicrosoftCXXABI.cpp
@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "CXXABI.h"
+#include "clang/Basic/TargetInfo.h"
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Type.h"
 #include "clang/AST/DeclCXX.h"
@@ -26,6 +27,13 @@ public:
   MicrosoftCXXABI(ASTContext &Ctx) : Context(Ctx) { }
 
   unsigned getMemberPointerSize(const MemberPointerType *MPT) const;
+
+  CallingConv getDefaultMethodCallConv() const {
+    if (Context.Target.getTriple().getArch() == llvm::Triple::x86)
+      return CC_X86ThisCall;
+    else
+      return CC_C;
+  }
 };
 }