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(Val: 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(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 | |
48 | bool Function::isVirtual() const { |
49 | if (const auto *M = dyn_cast<CXXMethodDecl>(Val: F)) |
50 | return M->isVirtual(); |
51 | return false; |
52 | } |
53 | |