d0262c2394
Most of `MemoryBuffer` interfaces expose a `RequiresNullTerminator` parameter that's being used to: * determine how to open a file (`mmap` vs `open`), * assert newly initialized buffer indeed has an implicit null terminator. This patch adds the paramater to the `SmallVectorMemoryBuffer` constructors, meaning: * null terminator can now be added to `SmallVector`s that didn't have one before, * `SmallVectors` that had a null terminator before keep it even after the move. In line with existing code, the new parameter is defaulted to `true`. This patch makes sure all calls to the `SmallVectorMemoryBuffer` constructor set it to `false` to preserve the current semantics. Reviewed By: dexonsmith Differential Revision: https://reviews.llvm.org/D115331
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
//===------ CompileUtils.cpp - Utilities for compiling IR in the JIT ------===//
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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 "llvm/ExecutionEngine/Orc/CompileUtils.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ExecutionEngine/ObjectCache.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SmallVectorMemoryBuffer.h"
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#include "llvm/Target/TargetMachine.h"
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#include <algorithm>
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namespace llvm {
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namespace orc {
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IRSymbolMapper::ManglingOptions
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irManglingOptionsFromTargetOptions(const TargetOptions &Opts) {
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IRSymbolMapper::ManglingOptions MO;
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MO.EmulatedTLS = Opts.EmulatedTLS;
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return MO;
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}
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/// Compile a Module to an ObjectFile.
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Expected<SimpleCompiler::CompileResult> SimpleCompiler::operator()(Module &M) {
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CompileResult CachedObject = tryToLoadFromObjectCache(M);
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if (CachedObject)
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return std::move(CachedObject);
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SmallVector<char, 0> ObjBufferSV;
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{
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raw_svector_ostream ObjStream(ObjBufferSV);
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legacy::PassManager PM;
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MCContext *Ctx;
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if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
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return make_error<StringError>("Target does not support MC emission",
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inconvertibleErrorCode());
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PM.run(M);
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}
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auto ObjBuffer = std::make_unique<SmallVectorMemoryBuffer>(
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std::move(ObjBufferSV), M.getModuleIdentifier() + "-jitted-objectbuffer",
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/*RequiresNullTerminator=*/false);
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auto Obj = object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
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if (!Obj)
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return Obj.takeError();
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notifyObjectCompiled(M, *ObjBuffer);
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return std::move(ObjBuffer);
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}
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SimpleCompiler::CompileResult
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SimpleCompiler::tryToLoadFromObjectCache(const Module &M) {
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if (!ObjCache)
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return CompileResult();
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return ObjCache->getObject(&M);
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}
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void SimpleCompiler::notifyObjectCompiled(const Module &M,
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const MemoryBuffer &ObjBuffer) {
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if (ObjCache)
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ObjCache->notifyObjectCompiled(&M, ObjBuffer.getMemBufferRef());
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}
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ConcurrentIRCompiler::ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,
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ObjectCache *ObjCache)
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: IRCompiler(irManglingOptionsFromTargetOptions(JTMB.getOptions())),
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JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
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Expected<std::unique_ptr<MemoryBuffer>>
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ConcurrentIRCompiler::operator()(Module &M) {
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auto TM = cantFail(JTMB.createTargetMachine());
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SimpleCompiler C(*TM, ObjCache);
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return C(M);
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}
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} // end namespace orc
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} // end namespace llvm
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