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https://github.com/Gericom/teak-llvm.git
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950b70dcc7
Summary: This patch introduces the skeleton of the constexpr interpreter, capable of evaluating a simple constexpr functions consisting of if statements. The interpreter is described in more detail in the RFC. Further patches will add more features. Reviewers: Bigcheese, jfb, rsmith Subscribers: bruno, uenoku, ldionne, Tyker, thegameg, tschuett, dexonsmith, mgorny, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D64146 llvm-svn: 371834
49 lines
1.7 KiB
C++
49 lines
1.7 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 "Program.h"
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#include "Opcode.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclCXX.h"
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using namespace clang;
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using namespace clang::interp;
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Function::Function(Program &P, const FunctionDecl *F, unsigned ArgSize,
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llvm::SmallVector<PrimType, 8> &&ParamTypes,
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llvm::DenseMap<unsigned, ParamDescriptor> &&Params)
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: P(P), Loc(F->getBeginLoc()), F(F), ArgSize(ArgSize),
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ParamTypes(std::move(ParamTypes)), Params(std::move(Params)) {}
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CodePtr Function::getCodeBegin() const { return Code.data(); }
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CodePtr Function::getCodeEnd() const { return Code.data() + Code.size(); }
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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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unsigned Offset = PC - getCodeBegin();
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using Elem = std::pair<unsigned, SourceInfo>;
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auto It = std::lower_bound(SrcMap.begin(), SrcMap.end(), Elem{Offset, {}},
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[](Elem A, Elem B) { return A.first < B.first; });
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if (It == SrcMap.end() || It->first != Offset)
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llvm::report_fatal_error("missing source location");
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return It->second;
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}
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bool Function::isVirtual() const {
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if (auto *M = dyn_cast<CXXMethodDecl>(F))
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return M->isVirtual();
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return false;
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}
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