1 //===----- JITTargetMachineBuilder.cpp - Build TargetMachines for JIT -----===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
11 
12 #include "llvm/Support/TargetRegistry.h"
13 
14 namespace llvm {
15 namespace orc {
16 
17 JITTargetMachineBuilder::JITTargetMachineBuilder(Triple TT)
18     : TT(std::move(TT)) {
19   Options.EmulatedTLS = true;
20   Options.ExplicitEmulatedTLS = true;
21 }
22 
23 Expected<JITTargetMachineBuilder> JITTargetMachineBuilder::detectHost() {
24   // FIXME: getProcessTriple is bogus. It returns the host LLVM was compiled on,
25   //        rather than a valid triple for the current process.
26   return JITTargetMachineBuilder(Triple(sys::getProcessTriple()));
27 }
28 
29 Expected<std::unique_ptr<TargetMachine>>
30 JITTargetMachineBuilder::createTargetMachine() {
31 
32   std::string ErrMsg;
33   auto *TheTarget = TargetRegistry::lookupTarget(TT.getTriple(), ErrMsg);
34   if (!TheTarget)
35     return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
36 
37   auto *TM =
38       TheTarget->createTargetMachine(TT.getTriple(), CPU, Features.getString(),
39                                      Options, RM, CM, OptLevel, /*JIT*/ true);
40   if (!TM)
41     return make_error<StringError>("Could not allocate target machine",
42                                    inconvertibleErrorCode());
43 
44   return std::unique_ptr<TargetMachine>(TM);
45 }
46 
47 JITTargetMachineBuilder &JITTargetMachineBuilder::addFeatures(
48     const std::vector<std::string> &FeatureVec) {
49   for (const auto &F : FeatureVec)
50     Features.AddFeature(F);
51   return *this;
52 }
53 
54 } // End namespace orc.
55 } // End namespace llvm.
56