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//===--- Function.h - Bytecode function for the VM --------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "Function.h"
#include "Program.h"
#include "clang/AST/ASTLambda.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
using namespace clang;
using namespace clang::interp;
Function::Function(Program &P, FunctionDeclTy Source, unsigned ArgSize,
llvm::SmallVectorImpl<PrimType> &&ParamTypes,
llvm::DenseMap<unsigned, ParamDescriptor> &&Params,
llvm::SmallVectorImpl<unsigned> &&ParamOffsets,
bool HasThisPointer, bool HasRVO, bool IsLambdaStaticInvoker)
: P(P), Kind(FunctionKind::Normal), Source(Source), ArgSize(ArgSize),
ParamTypes(std::move(ParamTypes)), Params(std::move(Params)),
ParamOffsets(std::move(ParamOffsets)), IsValid(false),
IsFullyCompiled(false), HasThisPointer(HasThisPointer), HasRVO(HasRVO),
HasBody(false), Defined(false) {
if (const auto *F = dyn_cast<const FunctionDecl *>(Source)) {
Variadic = F->isVariadic();
Immediate = F->isImmediateFunction();
Constexpr = F->isConstexpr() || F->hasAttr<MSConstexprAttr>();
if (const auto *CD = dyn_cast<CXXConstructorDecl>(F)) {
Virtual = CD->isVirtual();
Kind = FunctionKind::Ctor;
} else if (const auto *CD = dyn_cast<CXXDestructorDecl>(F)) {
Virtual = CD->isVirtual();
Kind = FunctionKind::Dtor;
} else if (const auto *MD = dyn_cast<CXXMethodDecl>(F)) {
Virtual = MD->isVirtual();
if (IsLambdaStaticInvoker)
Kind = FunctionKind::LambdaStaticInvoker;
else if (clang::isLambdaCallOperator(F))
Kind = FunctionKind::LambdaCallOperator;
else if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator())
Kind = FunctionKind::CopyOrMoveOperator;
} else {
Virtual = false;
}
} else {
Variadic = false;
Virtual = false;
Immediate = false;
Constexpr = false;
}
}
Function::ParamDescriptor Function::getParamDescriptor(unsigned Offset) const {
auto It = Params.find(Offset);
assert(It != Params.end() && "Invalid parameter offset");
return It->second;
}
SourceInfo Function::getSource(CodePtr PC) const {
assert(PC >= getCodeBegin() && "PC does not belong to this function");
assert(PC <= getCodeEnd() && "PC Does not belong to this function");
assert(hasBody() && "Function has no body");
unsigned Offset = PC - getCodeBegin();
using Elem = std::pair<unsigned, SourceInfo>;
auto It = llvm::lower_bound(SrcMap, Elem{Offset, {}}, llvm::less_first());
if (It == SrcMap.end())
return SrcMap.back().second;
return It->second;
}
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