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 "Opcode.h" 11 #include "Program.h" 12 #include "clang/AST/Decl.h" 13 #include "clang/AST/DeclCXX.h" 14 #include "clang/Basic/Builtins.h" 15 16 using namespace clang; 17 using namespace clang::interp; 18 19 Function::Function(Program &P, const FunctionDecl *F, unsigned ArgSize, 20 llvm::SmallVectorImpl<PrimType> &&ParamTypes, 21 llvm::DenseMap<unsigned, ParamDescriptor> &&Params, 22 llvm::SmallVectorImpl<unsigned> &&ParamOffsets, 23 bool HasThisPointer, bool HasRVO, bool UnevaluatedBuiltin) 24 : P(P), Loc(F->getBeginLoc()), F(F), ArgSize(ArgSize), 25 ParamTypes(std::move(ParamTypes)), Params(std::move(Params)), 26 ParamOffsets(std::move(ParamOffsets)), HasThisPointer(HasThisPointer), 27 HasRVO(HasRVO), Variadic(F->isVariadic()), 28 IsUnevaluatedBuiltin(UnevaluatedBuiltin) {} 29 30 Function::ParamDescriptor Function::getParamDescriptor(unsigned Offset) const { 31 auto It = Params.find(Offset); 32 assert(It != Params.end() && "Invalid parameter offset"); 33 return It->second; 34 } 35 36 SourceInfo Function::getSource(CodePtr PC) const { 37 assert(PC >= getCodeBegin() && "PC does not belong to this function"); 38 assert(PC <= getCodeEnd() && "PC Does not belong to this function"); 39 assert(hasBody() && "Function has no body"); 40 unsigned Offset = PC - getCodeBegin(); 41 using Elem = std::pair<unsigned, SourceInfo>; 42 auto It = llvm::lower_bound(SrcMap, Elem{Offset, {}}, llvm::less_first()); 43 assert(It != SrcMap.end()); 44 return It->second; 45 } 46 47 bool Function::isVirtual() const { 48 if (const auto *M = dyn_cast<CXXMethodDecl>(F)) 49 return M->isVirtual(); 50 return false; 51 } 52