ca148b2150
I started out by adding a new pointer type for blocks, and I was fully prepared to compile their AST to bytecode and later call them. ... then I found out that the current interpreter doesn't support calling blocks at all. So we reuse `Function` to support sources other than `FunctionDecl`s and classify `BlockPointerType` as `PT_FnPtr`.
56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
//===--- Function.h - Bytecode function for the VM --------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Function.h"
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#include "Opcode.h"
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#include "Program.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/Basic/Builtins.h"
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using namespace clang;
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using namespace clang::interp;
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Function::Function(Program &P, FunctionDeclTy Source, unsigned ArgSize,
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llvm::SmallVectorImpl<PrimType> &&ParamTypes,
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llvm::DenseMap<unsigned, ParamDescriptor> &&Params,
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llvm::SmallVectorImpl<unsigned> &&ParamOffsets,
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bool HasThisPointer, bool HasRVO, bool UnevaluatedBuiltin)
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: P(P), Source(Source), ArgSize(ArgSize), ParamTypes(std::move(ParamTypes)),
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Params(std::move(Params)), ParamOffsets(std::move(ParamOffsets)),
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HasThisPointer(HasThisPointer), HasRVO(HasRVO),
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IsUnevaluatedBuiltin(UnevaluatedBuiltin) {
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if (const auto *F = Source.dyn_cast<const FunctionDecl *>())
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Variadic = F->isVariadic();
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}
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Function::ParamDescriptor Function::getParamDescriptor(unsigned Offset) const {
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auto It = Params.find(Offset);
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assert(It != Params.end() && "Invalid parameter offset");
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return It->second;
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}
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SourceInfo Function::getSource(CodePtr PC) const {
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assert(PC >= getCodeBegin() && "PC does not belong to this function");
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assert(PC <= getCodeEnd() && "PC Does not belong to this function");
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assert(hasBody() && "Function has no body");
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unsigned Offset = PC - getCodeBegin();
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using Elem = std::pair<unsigned, SourceInfo>;
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auto It = llvm::lower_bound(SrcMap, Elem{Offset, {}}, llvm::less_first());
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if (It == SrcMap.end())
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return SrcMap.back().second;
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return It->second;
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}
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bool Function::isVirtual() const {
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if (const auto *M = dyn_cast_if_present<CXXMethodDecl>(
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Source.dyn_cast<const FunctionDecl *>()))
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return M->isVirtual();
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return false;
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}
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