1 //==---- CodeGenABITypes.h - Convert Clang types to LLVM types for ABI -----==// 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 // 10 // CodeGenABITypes is a simple interface for getting LLVM types for 11 // the parameters and the return value of a function given the Clang 12 // types. 13 // 14 // The class is implemented as a public wrapper around the private 15 // CodeGenTypes class in lib/CodeGen. 16 // 17 // It allows other clients, like LLDB, to determine the LLVM types that are 18 // actually used in function calls, which makes it possible to then determine 19 // the acutal ABI locations (e.g. registers, stack locations, etc.) that 20 // these parameters are stored in. 21 // 22 //===----------------------------------------------------------------------===// 23 24 #ifndef LLVM_CLANG_CODEGEN_CODEGENABITYPES_H 25 #define LLVM_CLANG_CODEGEN_CODEGENABITYPES_H 26 27 #include "clang/AST/CanonicalType.h" 28 #include "clang/AST/Type.h" 29 #include "clang/CodeGen/CGFunctionInfo.h" 30 31 namespace llvm { 32 class DataLayout; 33 class Module; 34 } 35 36 namespace clang { 37 class ASTContext; 38 class CXXRecordDecl; 39 class CXXMethodDecl; 40 class CodeGenOptions; 41 class CoverageSourceInfo; 42 class DiagnosticsEngine; 43 class HeaderSearchOptions; 44 class ObjCMethodDecl; 45 class PreprocessorOptions; 46 47 namespace CodeGen { 48 class CGFunctionInfo; 49 class CodeGenModule; 50 51 class CodeGenABITypes 52 { 53 public: 54 CodeGenABITypes(ASTContext &C, llvm::Module &M, 55 CoverageSourceInfo *CoverageInfo = nullptr); 56 ~CodeGenABITypes(); 57 58 /// These methods all forward to methods in the private implementation class 59 /// CodeGenTypes. 60 61 const CGFunctionInfo &arrangeObjCMessageSendSignature( 62 const ObjCMethodDecl *MD, 63 QualType receiverType); 64 const CGFunctionInfo &arrangeFreeFunctionType(CanQual<FunctionProtoType> Ty, 65 const FunctionDecl *FD); 66 const CGFunctionInfo &arrangeFreeFunctionType( 67 CanQual<FunctionNoProtoType> Ty); 68 const CGFunctionInfo &arrangeCXXMethodType(const CXXRecordDecl *RD, 69 const FunctionProtoType *FTP, 70 const CXXMethodDecl *MD); 71 const CGFunctionInfo &arrangeFreeFunctionCall(CanQualType returnType, 72 ArrayRef<CanQualType> argTypes, 73 FunctionType::ExtInfo info, 74 RequiredArgs args); 75 76 private: 77 /// Default CodeGenOptions object used to initialize the 78 /// CodeGenModule and otherwise not used. More specifically, it is 79 /// not used in ABI type generation, so none of the options matter. 80 std::unique_ptr<CodeGenOptions> CGO; 81 std::unique_ptr<HeaderSearchOptions> HSO; 82 std::unique_ptr<PreprocessorOptions> PPO; 83 84 /// The CodeGenModule we use get to the CodeGenTypes object. 85 std::unique_ptr<CodeGen::CodeGenModule> CGM; 86 }; 87 88 } // end namespace CodeGen 89 } // end namespace clang 90 91 #endif 92
