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/MC/MCContext.h"
16#include "llvm/Object/ObjectFile.h"
17#include "llvm/Support/Error.h"
18#include "llvm/Support/MemoryBuffer.h"
19#include "llvm/Support/SmallVectorMemoryBuffer.h"
20#include "llvm/Target/TargetMachine.h"
21
22namespace llvm {
23namespace orc {
24
25IRSymbolMapper::ManglingOptions
26irManglingOptionsFromTargetOptions(const TargetOptions &Opts) {
27 IRSymbolMapper::ManglingOptions MO;
28
29 MO.EmulatedTLS = Opts.EmulatedTLS;
30
31 return MO;
32}
33
34/// Compile a Module to an ObjectFile.
35Expected<SimpleCompiler::CompileResult> SimpleCompiler::operator()(Module &M) {
36 if (M.getDataLayout().isDefault()) {
37 M.setDataLayout(TM.getTargetTriple().computeDataLayout(
38 ABIName: TM.Options.MCOptions.getABIName()));
39 }
40
41 CompileResult CachedObject = tryToLoadFromObjectCache(M);
42 if (CachedObject)
43 return std::move(CachedObject);
44
45 SmallVector<char, 0> ObjBufferSV;
46
47 {
48 raw_svector_ostream ObjStream(ObjBufferSV);
49
50 legacy::PassManager PM;
51 MCContext *Ctx;
52 if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
53 return make_error<StringError>(Args: "Target does not support MC emission",
54 Args: inconvertibleErrorCode());
55 PM.run(M);
56 }
57
58 auto ObjBuffer = std::make_unique<SmallVectorMemoryBuffer>(
59 args: std::move(ObjBufferSV), args: M.getModuleIdentifier() + "-jitted-objectbuffer",
60 /*RequiresNullTerminator=*/args: false);
61
62 auto Obj = object::ObjectFile::createObjectFile(Object: ObjBuffer->getMemBufferRef());
63
64 if (!Obj)
65 return Obj.takeError();
66
67 notifyObjectCompiled(M, ObjBuffer: *ObjBuffer);
68 return std::move(ObjBuffer);
69}
70
71SimpleCompiler::CompileResult
72SimpleCompiler::tryToLoadFromObjectCache(const Module &M) {
73 if (!ObjCache)
74 return CompileResult();
75
76 return ObjCache->getObject(M: &M);
77}
78
79void SimpleCompiler::notifyObjectCompiled(const Module &M,
80 const MemoryBuffer &ObjBuffer) {
81 if (ObjCache)
82 ObjCache->notifyObjectCompiled(M: &M, Obj: ObjBuffer.getMemBufferRef());
83}
84
85ConcurrentIRCompiler::ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,
86 ObjectCache *ObjCache)
87 : IRCompiler(irManglingOptionsFromTargetOptions(Opts: JTMB.getOptions())),
88 JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
89
90Expected<std::unique_ptr<MemoryBuffer>>
91ConcurrentIRCompiler::operator()(Module &M) {
92 auto TM = cantFail(ValOrErr: JTMB.createTargetMachine());
93 SimpleCompiler C(*TM, ObjCache);
94 return C(M);
95}
96
97} // end namespace orc
98} // end namespace llvm
99