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 CodeGenOptions; 40 class DiagnosticsEngine; 41 class ObjCMethodDecl; 42 class CoverageSourceInfo; 43 44 namespace CodeGen { 45 class CGFunctionInfo; 46 class CodeGenModule; 47 48 class CodeGenABITypes 49 { 50 public: 51 CodeGenABITypes(ASTContext &C, llvm::Module &M, const llvm::DataLayout &TD, 52 CoverageSourceInfo *CoverageInfo = nullptr); 53 ~CodeGenABITypes(); 54 55 /// These methods all forward to methods in the private implementation class 56 /// CodeGenTypes. 57 58 const CGFunctionInfo &arrangeObjCMessageSendSignature( 59 const ObjCMethodDecl *MD, 60 QualType receiverType); 61 const CGFunctionInfo &arrangeFreeFunctionType( 62 CanQual<FunctionProtoType> Ty); 63 const CGFunctionInfo &arrangeFreeFunctionType( 64 CanQual<FunctionNoProtoType> Ty); 65 const CGFunctionInfo &arrangeCXXMethodType(const CXXRecordDecl *RD, 66 const FunctionProtoType *FTP); 67 const CGFunctionInfo &arrangeFreeFunctionCall(CanQualType returnType, 68 ArrayRef<CanQualType> argTypes, 69 FunctionType::ExtInfo info, 70 RequiredArgs args); 71 72 private: 73 /// Default CodeGenOptions object used to initialize the 74 /// CodeGenModule and otherwise not used. More specifically, it is 75 /// not used in ABI type generation, so none of the options matter. 76 CodeGenOptions *CGO; 77 78 /// The CodeGenModule we use get to the CodeGenTypes object. 79 CodeGen::CodeGenModule *CGM; 80 }; 81 82 } // end namespace CodeGen 83 } // end namespace clang 84 85 #endif 86
