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+//===--- MicrosoftCXXABI.cpp - Emit LLVM Code from ASTs for a Module ------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides C++ code generation targeting the Microsoft Visual C++ ABI.
+// The class in this file generates structures that follow the Microsoft
+// Visual C++ ABI, which is actually not very well documented at all outside
+// of Microsoft.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CGCXXABI.h"
+#include "CodeGenModule.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclCXX.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+namespace {
+
+class MicrosoftCXXABI : public CGCXXABI {
+public:
+ MicrosoftCXXABI(CodeGenModule &CGM) : CGCXXABI(CGM) {}
+
+ void BuildConstructorSignature(const CXXConstructorDecl *Ctor,
+ CXXCtorType Type,
+ CanQualType &ResTy,
+ SmallVectorImpl<CanQualType> &ArgTys) {
+ // 'this' is already in place
+ // TODO: 'for base' flag
+ }
+
+ void BuildDestructorSignature(const CXXDestructorDecl *Ctor,
+ CXXDtorType Type,
+ CanQualType &ResTy,
+ SmallVectorImpl<CanQualType> &ArgTys) {
+ // 'this' is already in place
+ // TODO: 'for base' flag
+ }
+
+ void BuildInstanceFunctionParams(CodeGenFunction &CGF,
+ QualType &ResTy,
+ FunctionArgList &Params) {
+ BuildThisParam(CGF, Params);
+ // TODO: 'for base' flag
+ }
+
+ void EmitInstanceFunctionProlog(CodeGenFunction &CGF) {
+ EmitThisParam(CGF);
+ // TODO: 'for base' flag
+ }
+
+ // ==== Notes on array cookies =========
+ //
+ // MSVC seems to only use cookies when the class has a destructor; a
+ // two-argument usual array deallocation function isn't sufficient.
+ //
+ // For example, this code prints "100" and "1":
+ // struct A {
+ // char x;
+ // void *operator new[](size_t sz) {
+ // printf("%u\n", sz);
+ // return malloc(sz);
+ // }
+ // void operator delete[](void *p, size_t sz) {
+ // printf("%u\n", sz);
+ // free(p);
+ // }
+ // };
+ // int main() {
+ // A *p = new A[100];
+ // delete[] p;
+ // }
+ // Whereas it prints "104" and "104" if you give A a destructor.
+ void ReadArrayCookie(CodeGenFunction &CGF, llvm::Value *Ptr,
+ const CXXDeleteExpr *expr,
+ QualType ElementType, llvm::Value *&NumElements,
+ llvm::Value *&AllocPtr, CharUnits &CookieSize) {
+ CGF.CGM.ErrorUnsupported(expr, "don't know how to handle array cookies "
+ "in the Microsoft C++ ABI");
+ }
+};
+
+}
+
+CGCXXABI *clang::CodeGen::CreateMicrosoftCXXABI(CodeGenModule &CGM) {
+ return new MicrosoftCXXABI(CGM);
+}
+