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      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::SmallVector<PrimType, 8> &&ParamTypes,
     20                    llvm::DenseMap<unsigned, ParamDescriptor> &&Params)
     21     : P(P), Loc(F->getBeginLoc()), F(F), ArgSize(ArgSize),
     22       ParamTypes(std::move(ParamTypes)), Params(std::move(Params)) {}
     23 
     24 CodePtr Function::getCodeBegin() const { return Code.data(); }
     25 
     26 CodePtr Function::getCodeEnd() const { return Code.data() + Code.size(); }
     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   unsigned Offset = PC - getCodeBegin();
     36   using Elem = std::pair<unsigned, SourceInfo>;
     37   auto It = std::lower_bound(SrcMap.begin(), SrcMap.end(), Elem{Offset, {}},
     38                              [](Elem A, Elem B) { return A.first < B.first; });
     39   if (It == SrcMap.end() || It->first != Offset)
     40     llvm::report_fatal_error("missing source location");
     41   return It->second;
     42 }
     43 
     44 bool Function::isVirtual() const {
     45   if (auto *M = dyn_cast<CXXMethodDecl>(F))
     46     return M->isVirtual();
     47   return false;
     48 }
     49