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

source code of llvm/lib/ExecutionEngine/Orc/CompileUtils.cpp