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Fri, Jan 24, 4:27 PM
Index: llvm/trunk/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h
===================================================================
--- llvm/trunk/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h (revision 270898)
+++ llvm/trunk/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h (revision 270899)
@@ -1,133 +1,133 @@
//===----- KaleidoscopeJIT.h - A simple JIT for Kaleidoscope ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Contains a simple JIT definition for use in the kaleidoscope tutorials.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
#define LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
#include "llvm/ADT/STLExtras.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/IRTransformLayer.h"
#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
#include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Mangler.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include <algorithm>
#include <memory>
#include <string>
#include <vector>
namespace llvm {
namespace orc {
class KaleidoscopeJIT {
private:
std::unique_ptr<TargetMachine> TM;
const DataLayout DL;
ObjectLinkingLayer<> ObjectLayer;
IRCompileLayer<decltype(ObjectLayer)> CompileLayer;
typedef std::function<std::unique_ptr<Module>(std::unique_ptr<Module>)>
OptimizeFunction;
IRTransformLayer<decltype(CompileLayer), OptimizeFunction> OptimizeLayer;
public:
typedef decltype(OptimizeLayer)::ModuleSetHandleT ModuleHandle;
KaleidoscopeJIT()
: TM(EngineBuilder().selectTarget()), DL(TM->createDataLayout()),
CompileLayer(ObjectLayer, SimpleCompiler(*TM)),
OptimizeLayer(CompileLayer,
[this](std::unique_ptr<Module> M) {
return optimizeModule(std::move(M));
}) {
llvm::sys::DynamicLibrary::LoadLibraryPermanently(nullptr);
}
TargetMachine &getTargetMachine() { return *TM; }
ModuleHandle addModule(std::unique_ptr<Module> M) {
// Build our symbol resolver:
// Lambda 1: Look back into the JIT itself to find symbols that are part of
// the same "logical dylib".
// Lambda 2: Search for external symbols in the host process.
auto Resolver = createLambdaResolver(
[&](const std::string &Name) {
- if (auto Sym = CompileLayer.findSymbol(Name, false))
+ if (auto Sym = OptimizeLayer.findSymbol(Name, false))
return RuntimeDyld::SymbolInfo(Sym.getAddress(), Sym.getFlags());
return RuntimeDyld::SymbolInfo(nullptr);
},
[](const std::string &Name) {
if (auto SymAddr =
RTDyldMemoryManager::getSymbolAddressInProcess(Name))
return RuntimeDyld::SymbolInfo(SymAddr, JITSymbolFlags::Exported);
return RuntimeDyld::SymbolInfo(nullptr);
});
// Build a singlton module set to hold our module.
std::vector<std::unique_ptr<Module>> Ms;
Ms.push_back(std::move(M));
// Add the set to the JIT with the resolver we created above and a newly
// created SectionMemoryManager.
return OptimizeLayer.addModuleSet(std::move(Ms),
make_unique<SectionMemoryManager>(),
std::move(Resolver));
}
JITSymbol findSymbol(const std::string Name) {
std::string MangledName;
raw_string_ostream MangledNameStream(MangledName);
Mangler::getNameWithPrefix(MangledNameStream, Name, DL);
return OptimizeLayer.findSymbol(MangledNameStream.str(), true);
}
void removeModule(ModuleHandle H) {
OptimizeLayer.removeModuleSet(H);
}
private:
std::unique_ptr<Module> optimizeModule(std::unique_ptr<Module> M) {
// Create a function pass manager.
auto FPM = llvm::make_unique<legacy::FunctionPassManager>(M.get());
// Add some optimizations.
FPM->add(createInstructionCombiningPass());
FPM->add(createReassociatePass());
FPM->add(createGVNPass());
FPM->add(createCFGSimplificationPass());
FPM->doInitialization();
// Run the optimizations over all functions in the module being added to
// the JIT.
for (auto &F : *M)
FPM->run(F);
return M;
}
};
} // end namespace orc
} // end namespace llvm
#endif // LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H

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