llvm/examples/OrcV2Examples/LLJITDumpObjects/LLJITDumpObjects.cpp

   1 //===----- LLJITDumpObjects.cpp - How to dump JIT'd objects with LLJIT ----===//
   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/ADT/StringMap.h"
  10 #include "llvm/ExecutionEngine/Orc/DebugUtils.h"
  11 #include "llvm/ExecutionEngine/Orc/LLJIT.h"
  12 #include "llvm/ExecutionEngine/Orc/ObjectTransformLayer.h"
  13 #include "llvm/Support/InitLLVM.h"
  14 #include "llvm/Support/TargetSelect.h"
  15 #include "llvm/Support/raw_ostream.h"
  16
  17 #include "../ExampleModules.h"
  18
  19 using namespace llvm;
  20 using namespace llvm::orc;
  21
  22 ExitOnError ExitOnErr;
  23
  24 cl::opt<bool> DumpJITdObjects("dump-jitted-objects",
  25                               cl::desc("dump jitted objects"), cl::Optional,
  26                               cl::init(true));
  27
  28 cl::opt<std::string> DumpDir("dump-dir",
  29                              cl::desc("directory to dump objects to"),
  30                              cl::Optional, cl::init(""));
  31
  32 cl::opt<std::string> DumpFileStem("dump-file-stem",
  33                                   cl::desc("Override default dump names"),
  34                                   cl::Optional, cl::init(""));
  35
  36 int main(int argc, char *argv[]) {
  37   // Initialize LLVM.
  38   InitLLVM X(argc, argv);
  39
  40   InitializeNativeTarget();
  41   InitializeNativeTargetAsmPrinter();
  42
  43   cl::ParseCommandLineOptions(argc, argv, "LLJITDumpObjects");
  44   ExitOnErr.setBanner(std::string(argv[0]) + ": ");
  45
  46   outs()
  47       << "Usage notes:\n"
  48          "  Use -debug-only=orc on debug builds to see log messages of objects "
  49          "being dumped\n"
  50          "  Specify -dump-dir to specify a dump directory\n"
  51          "  Specify -dump-file-stem to override the dump file stem\n"
  52          "  Specify -dump-jitted-objects=false to disable dumping\n";
  53
  54   auto J = ExitOnErr(LLJITBuilder().create());
  55
  56   if (DumpJITdObjects)
  57     J->getObjTransformLayer().setTransform(DumpObjects(DumpDir, DumpFileStem));
  58
  59   auto M = ExitOnErr(parseExampleModule(Add1Example, "add1"));
  60
  61   ExitOnErr(J->addIRModule(std::move(M)));
  62
  63   // Look up the JIT'd function, cast it to a function pointer, then call it.
  64   auto Add1Addr = ExitOnErr(J->lookup("add1"));
  65   int (*Add1)(int) = Add1Addr.toPtr<int(int)>();
  66
  67   int Result = Add1(42);
  68   outs() << "add1(42) = " << Result << "\n";
  69
  70   return 0;
  71 }