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 IRSymbolMapper::ManglingOptions
irManglingOptionsFromTargetOptions(const TargetOptions & Opts)28 irManglingOptionsFromTargetOptions(const TargetOptions &Opts) {
29 IRSymbolMapper::ManglingOptions MO;
30
31 MO.EmulatedTLS = Opts.EmulatedTLS;
32
33 return MO;
34 }
35
36 /// Compile a Module to an ObjectFile.
operator ()(Module & M)37 Expected<SimpleCompiler::CompileResult> SimpleCompiler::operator()(Module &M) {
38 CompileResult CachedObject = tryToLoadFromObjectCache(M);
39 if (CachedObject)
40 return std::move(CachedObject);
41
42 SmallVector<char, 0> ObjBufferSV;
43
44 {
45 raw_svector_ostream ObjStream(ObjBufferSV);
46
47 legacy::PassManager PM;
48 MCContext *Ctx;
49 if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
50 return make_error<StringError>("Target does not support MC emission",
51 inconvertibleErrorCode());
52 PM.run(M);
53 }
54
55 auto ObjBuffer = std::make_unique<SmallVectorMemoryBuffer>(
56 std::move(ObjBufferSV), M.getModuleIdentifier() + "-jitted-objectbuffer");
57
58 auto Obj = object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
59
60 if (!Obj)
61 return Obj.takeError();
62
63 notifyObjectCompiled(M, *ObjBuffer);
64 return std::move(ObjBuffer);
65 }
66
67 SimpleCompiler::CompileResult
tryToLoadFromObjectCache(const Module & M)68 SimpleCompiler::tryToLoadFromObjectCache(const Module &M) {
69 if (!ObjCache)
70 return CompileResult();
71
72 return ObjCache->getObject(&M);
73 }
74
notifyObjectCompiled(const Module & M,const MemoryBuffer & ObjBuffer)75 void SimpleCompiler::notifyObjectCompiled(const Module &M,
76 const MemoryBuffer &ObjBuffer) {
77 if (ObjCache)
78 ObjCache->notifyObjectCompiled(&M, ObjBuffer.getMemBufferRef());
79 }
80
ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,ObjectCache * ObjCache)81 ConcurrentIRCompiler::ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,
82 ObjectCache *ObjCache)
83 : IRCompiler(irManglingOptionsFromTargetOptions(JTMB.getOptions())),
84 JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
85
86 Expected<std::unique_ptr<MemoryBuffer>>
operator ()(Module & M)87 ConcurrentIRCompiler::operator()(Module &M) {
88 auto TM = cantFail(JTMB.createTargetMachine());
89 SimpleCompiler C(*TM, ObjCache);
90 return C(M);
91 }
92
93 } // end namespace orc
94 } // end namespace llvm
95