1 //===--- Function.h - Bytecode function for the VM --------------*- C++ -*-===// 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 #include "Function.h" 10 #include "Program.h" 11 #include "Opcode.h" 12 #include "clang/AST/Decl.h" 13 #include "clang/AST/DeclCXX.h" 14 15 using namespace clang; 16 using namespace clang::interp; 17 18 Function::Function(Program &P, const FunctionDecl *F, unsigned ArgSize, 19 llvm::SmallVectorImpl<PrimType> &&ParamTypes, 20 llvm::DenseMap<unsigned, ParamDescriptor> &&Params, 21 llvm::SmallVectorImpl<unsigned> &&ParamOffsets, 22 bool HasThisPointer, bool HasRVO) 23 : P(P), Loc(F->getBeginLoc()), F(F), ArgSize(ArgSize), 24 ParamTypes(std::move(ParamTypes)), Params(std::move(Params)), 25 ParamOffsets(std::move(ParamOffsets)), HasThisPointer(HasThisPointer), 26 HasRVO(HasRVO) {} 27 28 Function::ParamDescriptor Function::getParamDescriptor(unsigned Offset) const { 29 auto It = Params.find(Offset); 30 assert(It != Params.end() && "Invalid parameter offset"); 31 return It->second; 32 } 33 34 SourceInfo Function::getSource(CodePtr PC) const { 35 assert(PC >= getCodeBegin() && "PC does not belong to this function"); 36 assert(PC <= getCodeEnd() && "PC Does not belong to this function"); 37 assert(hasBody() && "Function has no body"); 38 unsigned Offset = PC - getCodeBegin(); 39 using Elem = std::pair<unsigned, SourceInfo>; 40 auto It = llvm::lower_bound(SrcMap, Elem{Offset, {}}, llvm::less_first()); 41 assert(It != SrcMap.end()); 42 return It->second; 43 } 44 45 bool Function::isVirtual() const { 46 if (auto *M = dyn_cast<CXXMethodDecl>(F)) 47 return M->isVirtual(); 48 return false; 49 } 50