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 "clang/AST/Decl.h"
12#include "clang/AST/DeclCXX.h"
13
14using namespace clang;
15using namespace clang::interp;
16
17Function::Function(Program &P, FunctionDeclTy Source, unsigned ArgSize,
18 llvm::SmallVectorImpl<PrimType> &&ParamTypes,
19 llvm::DenseMap<unsigned, ParamDescriptor> &&Params,
20 llvm::SmallVectorImpl<unsigned> &&ParamOffsets,
21 bool HasThisPointer, bool HasRVO, bool IsLambdaStaticInvoker)
22 : P(P), Kind(FunctionKind::Normal), Source(Source), ArgSize(ArgSize),
23 ParamTypes(std::move(ParamTypes)), Params(std::move(Params)),
24 ParamOffsets(std::move(ParamOffsets)), IsValid(false),
25 IsFullyCompiled(false), HasThisPointer(HasThisPointer), HasRVO(HasRVO),
26 HasBody(false), Defined(false) {
27 if (const auto *F = dyn_cast<const FunctionDecl *>(Val&: Source)) {
28 Variadic = F->isVariadic();
29 Immediate = F->isImmediateFunction();
30 Constexpr = F->isConstexpr() || F->hasAttr<MSConstexprAttr>();
31 if (const auto *CD = dyn_cast<CXXConstructorDecl>(Val: F)) {
32 Virtual = CD->isVirtual();
33 Kind = FunctionKind::Ctor;
34 } else if (const auto *CD = dyn_cast<CXXDestructorDecl>(Val: F)) {
35 Virtual = CD->isVirtual();
36 Kind = FunctionKind::Dtor;
37 } else if (const auto *MD = dyn_cast<CXXMethodDecl>(Val: F)) {
38 Virtual = MD->isVirtual();
39 if (IsLambdaStaticInvoker)
40 Kind = FunctionKind::LambdaStaticInvoker;
41 else if (clang::isLambdaCallOperator(DC: F))
42 Kind = FunctionKind::LambdaCallOperator;
43 else if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator())
44 Kind = FunctionKind::CopyOrMoveOperator;
45 } else {
46 Virtual = false;
47 }
48 } else {
49 Variadic = false;
50 Virtual = false;
51 Immediate = false;
52 Constexpr = false;
53 }
54}
55
56Function::ParamDescriptor Function::getParamDescriptor(unsigned Offset) const {
57 auto It = Params.find(Val: Offset);
58 assert(It != Params.end() && "Invalid parameter offset");
59 return It->second;
60}
61
62SourceInfo Function::getSource(CodePtr PC) const {
63 assert(PC >= getCodeBegin() && "PC does not belong to this function");
64 assert(PC <= getCodeEnd() && "PC Does not belong to this function");
65 assert(hasBody() && "Function has no body");
66 unsigned Offset = PC - getCodeBegin();
67 using Elem = std::pair<unsigned, SourceInfo>;
68 auto It = llvm::lower_bound(Range: SrcMap, Value: Elem{Offset, {}}, C: llvm::less_first());
69 if (It == SrcMap.end())
70 return SrcMap.back().second;
71 return It->second;
72}
73