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(Val: 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(Range: SrcMap, Value: Elem{Offset, {}}, C: llvm::less_first());
43 if (It == SrcMap.end())
44 return SrcMap.back().second;
45 return It->second;
46}
47
48bool Function::isVirtual() const {
49 if (const auto *M = dyn_cast<CXXMethodDecl>(Val: F))
50 return M->isVirtual();
51 return false;
52}
53