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
16using namespace clang;
17using namespace clang::interp;
18
19Function::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
30Function::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
36SourceInfo 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
47bool Function::isVirtual() const {
48  if (const auto *M = dyn_cast<CXXMethodDecl>(F))
49    return M->isVirtual();
50  return false;
51}
52