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
25using namespace clang;
26using namespace CodeGen;
27
28void CodeGen::addDefaultFunctionDefinitionAttributes(CodeGenModule &CGM,
29 llvm::AttrBuilder &attrs) {
30 CGM.addDefaultFunctionDefinitionAttributes(attrs);
31}
32
33const CGFunctionInfo &
34CodeGen::arrangeObjCMessageSendSignature(CodeGenModule &CGM,
35 const ObjCMethodDecl *MD,
36 QualType receiverType) {
37 return CGM.getTypes().arrangeObjCMessageSendSignature(MD, receiverType);
38}
39
40const CGFunctionInfo &
41CodeGen::arrangeFreeFunctionType(CodeGenModule &CGM,
42 CanQual<FunctionProtoType> Ty) {
43 return CGM.getTypes().arrangeFreeFunctionType(Ty);
44}
45
46const CGFunctionInfo &
47CodeGen::arrangeFreeFunctionType(CodeGenModule &CGM,
48 CanQual<FunctionNoProtoType> Ty) {
49 return CGM.getTypes().arrangeFreeFunctionType(Ty);
50}
51
52const CGFunctionInfo &
53CodeGen::arrangeCXXMethodType(CodeGenModule &CGM,
54 const CXXRecordDecl *RD,
55 const FunctionProtoType *FTP,
56 const CXXMethodDecl *MD) {
57 return CGM.getTypes().arrangeCXXMethodType(RD, FTP, MD);
58}
59
60const CGFunctionInfo &CodeGen::arrangeCXXMethodCall(
61 CodeGenModule &CGM, CanQualType returnType, ArrayRef<CanQualType> argTypes,
62 FunctionType::ExtInfo info,
63 ArrayRef<FunctionProtoType::ExtParameterInfo> paramInfos,
64 RequiredArgs args) {
65 return CGM.getTypes().arrangeLLVMFunctionInfo(
66 returnType, opts: FnInfoOpts::IsInstanceMethod, argTypes, info, paramInfos,
67 args);
68}
69
70const CGFunctionInfo &CodeGen::arrangeFreeFunctionCall(
71 CodeGenModule &CGM, CanQualType returnType, ArrayRef<CanQualType> argTypes,
72 FunctionType::ExtInfo info,
73 ArrayRef<FunctionProtoType::ExtParameterInfo> paramInfos,
74 RequiredArgs args) {
75 return CGM.getTypes().arrangeLLVMFunctionInfo(
76 returnType, opts: FnInfoOpts::None, argTypes, info, paramInfos, args);
77}
78
79ImplicitCXXConstructorArgs
80CodeGen::getImplicitCXXConstructorArgs(CodeGenModule &CGM,
81 const CXXConstructorDecl *D) {
82 // We have to create a dummy CodeGenFunction here to pass to
83 // getImplicitConstructorArgs(). In some cases (base and delegating
84 // constructor calls), getImplicitConstructorArgs() can reach into the
85 // CodeGenFunction to find parameters of the calling constructor to pass on to
86 // the called constructor, but that can't happen here because we're asking for
87 // the args for a complete, non-delegating constructor call.
88 CodeGenFunction CGF(CGM, /* suppressNewContext= */ true);
89 CGCXXABI::AddedStructorArgs addedArgs =
90 CGM.getCXXABI().getImplicitConstructorArgs(CGF, D, Type: Ctor_Complete,
91 /* ForVirtualBase= */ false,
92 /* Delegating= */ false);
93 ImplicitCXXConstructorArgs implicitArgs;
94 for (const auto &arg : addedArgs.Prefix) {
95 implicitArgs.Prefix.push_back(Elt: arg.Value);
96 }
97 for (const auto &arg : addedArgs.Suffix) {
98 implicitArgs.Suffix.push_back(Elt: arg.Value);
99 }
100 return implicitArgs;
101}
102
103llvm::FunctionType *
104CodeGen::convertFreeFunctionType(CodeGenModule &CGM, const FunctionDecl *FD) {
105 assert(FD != nullptr && "Expected a non-null function declaration!");
106 llvm::Type *T = CGM.getTypes().ConvertType(T: FD->getType());
107
108 if (auto FT = dyn_cast<llvm::FunctionType>(Val: T))
109 return FT;
110
111 return nullptr;
112}
113
114llvm::Type *
115CodeGen::convertTypeForMemory(CodeGenModule &CGM, QualType T) {
116 return CGM.getTypes().ConvertTypeForMem(T);
117}
118
119unsigned CodeGen::getLLVMFieldNumber(CodeGenModule &CGM,
120 const RecordDecl *RD,
121 const FieldDecl *FD) {
122 return CGM.getTypes().getCGRecordLayout(RD).getLLVMFieldNo(FD);
123}
124
125llvm::Value *CodeGen::getCXXDestructorImplicitParam(
126 CodeGenModule &CGM, llvm::BasicBlock *InsertBlock,
127 llvm::BasicBlock::iterator InsertPoint, const CXXDestructorDecl *D,
128 CXXDtorType Type, bool ForVirtualBase, bool Delegating) {
129 CodeGenFunction CGF(CGM, /*suppressNewContext=*/true);
130 CGF.CurCodeDecl = D;
131 CGF.CurFuncDecl = D;
132 CGF.CurFn = InsertBlock->getParent();
133 CGF.Builder.SetInsertPoint(TheBB: InsertBlock, IP: InsertPoint);
134 return CGM.getCXXABI().getCXXDestructorImplicitParam(
135 CGF, DD: D, Type, ForVirtualBase, Delegating);
136}
137