Implement support for member pointers under the Microsoft C++ ABI in the
AST library.
This also adds infrastructure for supporting multiple C++ ABIs in the AST.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111117 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/MicrosoftCXXABI.cpp b/lib/AST/MicrosoftCXXABI.cpp
new file mode 100644
index 0000000..87b7767
--- /dev/null
+++ b/lib/AST/MicrosoftCXXABI.cpp
@@ -0,0 +1,48 @@
+//===------- MicrosoftCXXABI.cpp - AST support for the Microsoft C++ ABI --===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides C++ AST support targetting the Microsoft Visual C++
+// ABI.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CXXABI.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Type.h"
+#include "clang/AST/DeclCXX.h"
+
+using namespace clang;
+
+namespace {
+class MicrosoftCXXABI : public CXXABI {
+ ASTContext &Context;
+public:
+ MicrosoftCXXABI(ASTContext &Ctx) : Context(Ctx) { }
+
+ unsigned getMemberPointerSize(const MemberPointerType *MPT) const;
+};
+}
+
+unsigned MicrosoftCXXABI::getMemberPointerSize(const MemberPointerType *MPT) const {
+ QualType Pointee = MPT->getPointeeType();
+ CXXRecordDecl *RD = MPT->getClass()->getAsCXXRecordDecl();
+ if (RD->getNumVBases() > 0) {
+ if (Pointee->isFunctionType())
+ return 3;
+ else
+ return 2;
+ } else if (RD->getNumBases() > 1 && Pointee->isFunctionType())
+ return 2;
+ return 1;
+}
+
+CXXABI *clang::CreateMicrosoftCXXABI(ASTContext &Ctx) {
+ return new MicrosoftCXXABI(Ctx);
+}
+