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
27using namespace clang;
28using namespace CodeGen;
29
30void CodeGen::addDefaultFunctionDefinitionAttributes(CodeGenModule &CGM,
31 llvm::AttrBuilder &attrs) {
32 CGM.addDefaultFunctionDefinitionAttributes(attrs);
33}
34
35const CGFunctionInfo &
36CodeGen::arrangeObjCMessageSendSignature(CodeGenModule &CGM,
37 const ObjCMethodDecl *MD,
38 QualType receiverType) {
39 return CGM.getTypes().arrangeObjCMessageSendSignature(MD, receiverType);
40}
41
42const CGFunctionInfo &
43CodeGen::arrangeFreeFunctionType(CodeGenModule &CGM,
44 CanQual<FunctionProtoType> Ty) {
45 return CGM.getTypes().arrangeFreeFunctionType(Ty);
46}
47
48const CGFunctionInfo &
49CodeGen::arrangeFreeFunctionType(CodeGenModule &CGM,
50 CanQual<FunctionNoProtoType> Ty) {
51 return CGM.getTypes().arrangeFreeFunctionType(Ty);
52}
53
54const CGFunctionInfo &
55CodeGen::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
62const CGFunctionInfo &
63CodeGen::arrangeFreeFunctionCall(CodeGenModule &CGM,
64 CanQualType returnType,
65 ArrayRef<CanQualType> argTypes,
66 FunctionType::ExtInfo info,
67 RequiredArgs args) {
68 return CGM.getTypes().arrangeLLVMFunctionInfo(
69 returnType, /*instanceMethod=*/false, /*chainCall=*/false, argTypes,
70 info, {}, args);
71}
72
73ImplicitCXXConstructorArgs
74CodeGen::getImplicitCXXConstructorArgs(CodeGenModule &CGM,
75 const CXXConstructorDecl *D) {
76 // We have to create a dummy CodeGenFunction here to pass to
77 // getImplicitConstructorArgs(). In some cases (base and delegating
78 // constructor calls), getImplicitConstructorArgs() can reach into the
79 // CodeGenFunction to find parameters of the calling constructor to pass on to
80 // the called constructor, but that can't happen here because we're asking for
81 // the args for a complete, non-delegating constructor call.
82 CodeGenFunction CGF(CGM, /* suppressNewContext= */ true);
83 CGCXXABI::AddedStructorArgs addedArgs =
84 CGM.getCXXABI().getImplicitConstructorArgs(CGF, D, Ctor_Complete,
85 /* ForVirtualBase= */ false,
86 /* Delegating= */ false);
87 ImplicitCXXConstructorArgs implicitArgs;
88 for (const auto &arg : addedArgs.Prefix) {
89 implicitArgs.Prefix.push_back(arg.Value);
90 }
91 for (const auto &arg : addedArgs.Suffix) {
92 implicitArgs.Suffix.push_back(arg.Value);
93 }
94 return implicitArgs;
95}
96
97llvm::FunctionType *
98CodeGen::convertFreeFunctionType(CodeGenModule &CGM, const FunctionDecl *FD) {
99 assert(FD != nullptr && "Expected a non-null function declaration!");
100 llvm::Type *T = CGM.getTypes().ConvertType(FD->getType());
101
102 if (auto FT = dyn_cast<llvm::FunctionType>(T))
103 return FT;
104
105 return nullptr;
106}
107
108llvm::Type *
109CodeGen::convertTypeForMemory(CodeGenModule &CGM, QualType T) {
110 return CGM.getTypes().ConvertTypeForMem(T);
111}
112
113unsigned CodeGen::getLLVMFieldNumber(CodeGenModule &CGM,
114 const RecordDecl *RD,
115 const FieldDecl *FD) {
116 return CGM.getTypes().getCGRecordLayout(RD).getLLVMFieldNo(FD);
117}
118
119llvm::Value *CodeGen::getCXXDestructorImplicitParam(
120 CodeGenModule &CGM, llvm::BasicBlock *InsertBlock,
121 llvm::BasicBlock::iterator InsertPoint, const CXXDestructorDecl *D,
122 CXXDtorType Type, bool ForVirtualBase, bool Delegating) {
123 CodeGenFunction CGF(CGM, /*suppressNewContext=*/true);
124 CGF.CurCodeDecl = D;
125 CGF.CurFuncDecl = D;
126 CGF.CurFn = InsertBlock->getParent();
127 CGF.Builder.SetInsertPoint(InsertBlock, InsertPoint);
128 return CGM.getCXXABI().getCXXDestructorImplicitParam(
129 CGF, D, Type, ForVirtualBase, Delegating);
130}
131