Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 1 | //===--- MicrosoftCXXABI.cpp - Emit LLVM Code from ASTs for a Module ------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
Chris Lattner | fc8f0e1 | 2011-04-15 05:22:18 +0000 | [diff] [blame] | 10 | // This provides C++ code generation targeting the Microsoft Visual C++ ABI. |
Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 11 | // The class in this file generates structures that follow the Microsoft |
| 12 | // Visual C++ ABI, which is actually not very well documented at all outside |
| 13 | // of Microsoft. |
| 14 | // |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | |
| 17 | #include "CGCXXABI.h" |
| 18 | #include "CodeGenModule.h" |
Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 19 | #include "clang/AST/Decl.h" |
| 20 | #include "clang/AST/DeclCXX.h" |
Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 21 | |
| 22 | using namespace clang; |
| 23 | using namespace CodeGen; |
| 24 | |
| 25 | namespace { |
| 26 | |
Charles Davis | 071cc7d | 2010-08-16 03:33:14 +0000 | [diff] [blame] | 27 | class MicrosoftCXXABI : public CGCXXABI { |
Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 28 | public: |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 29 | MicrosoftCXXABI(CodeGenModule &CGM) : CGCXXABI(CGM) {} |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 30 | |
| 31 | void BuildConstructorSignature(const CXXConstructorDecl *Ctor, |
| 32 | CXXCtorType Type, |
| 33 | CanQualType &ResTy, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 34 | SmallVectorImpl<CanQualType> &ArgTys) { |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 35 | // 'this' is already in place |
| 36 | // TODO: 'for base' flag |
| 37 | } |
| 38 | |
| 39 | void BuildDestructorSignature(const CXXDestructorDecl *Ctor, |
| 40 | CXXDtorType Type, |
| 41 | CanQualType &ResTy, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 42 | SmallVectorImpl<CanQualType> &ArgTys) { |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 43 | // 'this' is already in place |
| 44 | // TODO: 'for base' flag |
| 45 | } |
| 46 | |
| 47 | void BuildInstanceFunctionParams(CodeGenFunction &CGF, |
| 48 | QualType &ResTy, |
| 49 | FunctionArgList &Params) { |
| 50 | BuildThisParam(CGF, Params); |
| 51 | // TODO: 'for base' flag |
| 52 | } |
| 53 | |
| 54 | void EmitInstanceFunctionProlog(CodeGenFunction &CGF) { |
| 55 | EmitThisParam(CGF); |
| 56 | // TODO: 'for base' flag |
| 57 | } |
John McCall | fd70826 | 2011-01-27 02:46:02 +0000 | [diff] [blame] | 58 | |
| 59 | // ==== Notes on array cookies ========= |
| 60 | // |
| 61 | // MSVC seems to only use cookies when the class has a destructor; a |
| 62 | // two-argument usual array deallocation function isn't sufficient. |
| 63 | // |
| 64 | // For example, this code prints "100" and "1": |
| 65 | // struct A { |
| 66 | // char x; |
| 67 | // void *operator new[](size_t sz) { |
| 68 | // printf("%u\n", sz); |
| 69 | // return malloc(sz); |
| 70 | // } |
| 71 | // void operator delete[](void *p, size_t sz) { |
| 72 | // printf("%u\n", sz); |
| 73 | // free(p); |
| 74 | // } |
| 75 | // }; |
| 76 | // int main() { |
| 77 | // A *p = new A[100]; |
| 78 | // delete[] p; |
| 79 | // } |
| 80 | // Whereas it prints "104" and "104" if you give A a destructor. |
Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 81 | }; |
| 82 | |
| 83 | } |
| 84 | |
Charles Davis | 071cc7d | 2010-08-16 03:33:14 +0000 | [diff] [blame] | 85 | CGCXXABI *clang::CodeGen::CreateMicrosoftCXXABI(CodeGenModule &CGM) { |
Charles Davis | c392664 | 2010-06-09 23:25:41 +0000 | [diff] [blame] | 86 | return new MicrosoftCXXABI(CGM); |
| 87 | } |
| 88 | |