1 //==--- CodeGenABITypes.cpp - Convert Clang types to LLVM types for ABI ----==//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // CodeGenABITypes is a simple interface for getting LLVM types for
10 // the parameters and the return value of a function given the Clang
11 // types.
12 //
13 // The class is implemented as a public wrapper around the private
14 // CodeGenTypes class in lib/CodeGen.
15 //
16 //===----------------------------------------------------------------------===//
17
18 #include "clang/CodeGen/CodeGenABITypes.h"
19 #include "CGCXXABI.h"
20 #include "CGRecordLayout.h"
21 #include "CodeGenFunction.h"
22 #include "CodeGenModule.h"
23 #include "clang/CodeGen/CGFunctionInfo.h"
24 #include "clang/Lex/HeaderSearchOptions.h"
25 #include "clang/Lex/PreprocessorOptions.h"
26
27 using namespace clang;
28 using namespace CodeGen;
29
addDefaultFunctionDefinitionAttributes(CodeGenModule & CGM,llvm::AttrBuilder & attrs)30 void CodeGen::addDefaultFunctionDefinitionAttributes(CodeGenModule &CGM,
31 llvm::AttrBuilder &attrs) {
32 CGM.addDefaultFunctionDefinitionAttributes(attrs);
33 }
34
35 const CGFunctionInfo &
arrangeObjCMessageSendSignature(CodeGenModule & CGM,const ObjCMethodDecl * MD,QualType receiverType)36 CodeGen::arrangeObjCMessageSendSignature(CodeGenModule &CGM,
37 const ObjCMethodDecl *MD,
38 QualType receiverType) {
39 return CGM.getTypes().arrangeObjCMessageSendSignature(MD, receiverType);
40 }
41
42 const CGFunctionInfo &
arrangeFreeFunctionType(CodeGenModule & CGM,CanQual<FunctionProtoType> Ty)43 CodeGen::arrangeFreeFunctionType(CodeGenModule &CGM,
44 CanQual<FunctionProtoType> Ty) {
45 return CGM.getTypes().arrangeFreeFunctionType(Ty);
46 }
47
48 const CGFunctionInfo &
arrangeFreeFunctionType(CodeGenModule & CGM,CanQual<FunctionNoProtoType> Ty)49 CodeGen::arrangeFreeFunctionType(CodeGenModule &CGM,
50 CanQual<FunctionNoProtoType> Ty) {
51 return CGM.getTypes().arrangeFreeFunctionType(Ty);
52 }
53
54 const CGFunctionInfo &
arrangeCXXMethodType(CodeGenModule & CGM,const CXXRecordDecl * RD,const FunctionProtoType * FTP,const CXXMethodDecl * MD)55 CodeGen::arrangeCXXMethodType(CodeGenModule &CGM,
56 const CXXRecordDecl *RD,
57 const FunctionProtoType *FTP,
58 const CXXMethodDecl *MD) {
59 return CGM.getTypes().arrangeCXXMethodType(RD, FTP, MD);
60 }
61
62 const CGFunctionInfo &
arrangeFreeFunctionCall(CodeGenModule & CGM,CanQualType returnType,ArrayRef<CanQualType> argTypes,FunctionType::ExtInfo info,RequiredArgs args)63 CodeGen::arrangeFreeFunctionCall(CodeGenModule &CGM,
64 CanQualType returnType,
65 ArrayRef<CanQualType> argTypes,
66 FunctionType::ExtInfo info,
67 RequiredArgs args) {
68 return CGM.getTypes().arrangeLLVMFunctionInfo(returnType, FnInfoOpts::None,
69 argTypes, info, {}, args);
70 }
71
72 ImplicitCXXConstructorArgs
getImplicitCXXConstructorArgs(CodeGenModule & CGM,const CXXConstructorDecl * D)73 CodeGen::getImplicitCXXConstructorArgs(CodeGenModule &CGM,
74 const CXXConstructorDecl *D) {
75 // We have to create a dummy CodeGenFunction here to pass to
76 // getImplicitConstructorArgs(). In some cases (base and delegating
77 // constructor calls), getImplicitConstructorArgs() can reach into the
78 // CodeGenFunction to find parameters of the calling constructor to pass on to
79 // the called constructor, but that can't happen here because we're asking for
80 // the args for a complete, non-delegating constructor call.
81 CodeGenFunction CGF(CGM, /* suppressNewContext= */ true);
82 CGCXXABI::AddedStructorArgs addedArgs =
83 CGM.getCXXABI().getImplicitConstructorArgs(CGF, D, Ctor_Complete,
84 /* ForVirtualBase= */ false,
85 /* Delegating= */ false);
86 ImplicitCXXConstructorArgs implicitArgs;
87 for (const auto &arg : addedArgs.Prefix) {
88 implicitArgs.Prefix.push_back(arg.Value);
89 }
90 for (const auto &arg : addedArgs.Suffix) {
91 implicitArgs.Suffix.push_back(arg.Value);
92 }
93 return implicitArgs;
94 }
95
96 llvm::FunctionType *
convertFreeFunctionType(CodeGenModule & CGM,const FunctionDecl * FD)97 CodeGen::convertFreeFunctionType(CodeGenModule &CGM, const FunctionDecl *FD) {
98 assert(FD != nullptr && "Expected a non-null function declaration!");
99 llvm::Type *T = CGM.getTypes().ConvertType(FD->getType());
100
101 if (auto FT = dyn_cast<llvm::FunctionType>(T))
102 return FT;
103
104 return nullptr;
105 }
106
107 llvm::Type *
convertTypeForMemory(CodeGenModule & CGM,QualType T)108 CodeGen::convertTypeForMemory(CodeGenModule &CGM, QualType T) {
109 return CGM.getTypes().ConvertTypeForMem(T);
110 }
111
getLLVMFieldNumber(CodeGenModule & CGM,const RecordDecl * RD,const FieldDecl * FD)112 unsigned CodeGen::getLLVMFieldNumber(CodeGenModule &CGM,
113 const RecordDecl *RD,
114 const FieldDecl *FD) {
115 return CGM.getTypes().getCGRecordLayout(RD).getLLVMFieldNo(FD);
116 }
117
getCXXDestructorImplicitParam(CodeGenModule & CGM,llvm::BasicBlock * InsertBlock,llvm::BasicBlock::iterator InsertPoint,const CXXDestructorDecl * D,CXXDtorType Type,bool ForVirtualBase,bool Delegating)118 llvm::Value *CodeGen::getCXXDestructorImplicitParam(
119 CodeGenModule &CGM, llvm::BasicBlock *InsertBlock,
120 llvm::BasicBlock::iterator InsertPoint, const CXXDestructorDecl *D,
121 CXXDtorType Type, bool ForVirtualBase, bool Delegating) {
122 CodeGenFunction CGF(CGM, /*suppressNewContext=*/true);
123 CGF.CurCodeDecl = D;
124 CGF.CurFuncDecl = D;
125 CGF.CurFn = InsertBlock->getParent();
126 CGF.Builder.SetInsertPoint(InsertBlock, InsertPoint);
127 return CGM.getCXXABI().getCXXDestructorImplicitParam(
128 CGF, D, Type, ForVirtualBase, Delegating);
129 }
130