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comparison lib/ExecutionEngine/Orc/CompileUtils.cpp @ 148:63bd29f05246

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merged
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 19:46:37 +0900
parents c2174574ed3a
children
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146:3fc4d5c3e21e 148:63bd29f05246
1 //===------ CompileUtils.cpp - Utilities for compiling IR in the JIT ------===//
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 "llvm/ExecutionEngine/Orc/CompileUtils.h"
10
11 #include "llvm/ADT/SmallVector.h"
12 #include "llvm/ExecutionEngine/ObjectCache.h"
13 #include "llvm/IR/LegacyPassManager.h"
14 #include "llvm/IR/Module.h"
15 #include "llvm/Object/ObjectFile.h"
16 #include "llvm/Support/Error.h"
17 #include "llvm/Support/ErrorHandling.h"
18 #include "llvm/Support/MemoryBuffer.h"
19 #include "llvm/Support/SmallVectorMemoryBuffer.h"
20 #include "llvm/Target/TargetMachine.h"
21
22 #include <algorithm>
23
24 namespace llvm {
25 namespace orc {
26
27 /// Compile a Module to an ObjectFile.
28 SimpleCompiler::CompileResult SimpleCompiler::operator()(Module &M) {
29 CompileResult CachedObject = tryToLoadFromObjectCache(M);
30 if (CachedObject)
31 return CachedObject;
32
33 SmallVector<char, 0> ObjBufferSV;
34
35 {
36 raw_svector_ostream ObjStream(ObjBufferSV);
37
38 legacy::PassManager PM;
39 MCContext *Ctx;
40 if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
41 llvm_unreachable("Target does not support MC emission.");
42 PM.run(M);
43 }
44
45 auto ObjBuffer = llvm::make_unique<SmallVectorMemoryBuffer>(
46 std::move(ObjBufferSV),
47 "<in memory object compiled from " + M.getModuleIdentifier() + ">");
48
49 auto Obj = object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
50
51 if (Obj) {
52 notifyObjectCompiled(M, *ObjBuffer);
53 return std::move(ObjBuffer);
54 }
55
56 // TODO: Actually report errors helpfully.
57 consumeError(Obj.takeError());
58 return nullptr;
59 }
60
61 SimpleCompiler::CompileResult
62 SimpleCompiler::tryToLoadFromObjectCache(const Module &M) {
63 if (!ObjCache)
64 return CompileResult();
65
66 return ObjCache->getObject(&M);
67 }
68
69 void SimpleCompiler::notifyObjectCompiled(const Module &M,
70 const MemoryBuffer &ObjBuffer) {
71 if (ObjCache)
72 ObjCache->notifyObjectCompiled(&M, ObjBuffer.getMemBufferRef());
73 }
74
75 ConcurrentIRCompiler::ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,
76 ObjectCache *ObjCache)
77 : JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
78
79 std::unique_ptr<MemoryBuffer> ConcurrentIRCompiler::operator()(Module &M) {
80 auto TM = cantFail(JTMB.createTargetMachine());
81 SimpleCompiler C(*TM, ObjCache);
82 return C(M);
83 }
84
85 } // end namespace orc
86 } // end namespace llvm