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/*
* Copyright (c) 2011, Denis Steckelmacher <steckdenis@yahoo.fr>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file cpu/program.cpp
* \brief CPU program
*/
#include "program.h"
#include "device.h"
#include "kernel.h"
#include "builtins.h"
#include "../program.h"
#include <llvm/PassManager.h>
#include <llvm/Analysis/Passes.h>
#include <llvm/IR/Verifier.h>
#include <llvm/Transforms/Scalar.h>
#include <llvm/Transforms/IPO.h>
#include <llvm/ExecutionEngine/ExecutionEngine.h>
#include <llvm/ExecutionEngine/MCJIT.h>
#include <llvm/ExecutionEngine/SectionMemoryManager.h>
#include <llvm/ExecutionEngine/Interpreter.h>
#include <llvm/Support/ErrorHandling.h>
#include <string>
#include <iostream>
using namespace Coal;
using namespace llvm;
// Create a custom memory manager for MCJIT
class ClientMemoryManager : public SectionMemoryManager
{
ClientMemoryManager(const ClientMemoryManager&) LLVM_DELETED_FUNCTION;
void operator=(const ClientMemoryManager&) LLVM_DELETED_FUNCTION;
public:
ClientMemoryManager() {}
virtual ~ClientMemoryManager() {}
/// This method returns the (host) address of the specified function.
virtual uint64_t getSymbolAddress(const std::string &Name);
};
uint64_t ClientMemoryManager::getSymbolAddress(const std::string &Name)
{
// Try the standard symbol resolution first, but ask it not to abort.
uint64_t addr = RTDyldMemoryManager::getSymbolAddress(Name);
if (!addr) {
addr = (uint64_t)getBuiltin(Name);
}
if (!addr)
report_fatal_error("OpenCL program references external function '" + Name +
"' which could not be resolved!");
return addr;
}
CPUProgram::CPUProgram(CPUDevice *device, Program *program)
: DeviceProgram(), p_device(device), p_program(program), p_jit(0)
{
}
CPUProgram::~CPUProgram()
{
if (p_jit)
{
// Dont delete the module
p_jit->removeModule(p_module);
delete p_jit;
}
}
bool CPUProgram::linkStdLib() const
{
return true;
}
void CPUProgram::createOptimizationPasses(llvm::PassManager *manager,
bool optimize, bool hasBarrier)
{
if (optimize)
{
/*
* Inspired by code from "The LLVM Compiler Infrastructure"
*/
manager->add(llvm::createDeadArgEliminationPass());
manager->add(llvm::createInstructionCombiningPass());
manager->add(llvm::createFunctionInliningPass());
manager->add(llvm::createPruneEHPass()); // Remove dead EH info.
manager->add(llvm::createGlobalOptimizerPass());
manager->add(llvm::createGlobalDCEPass()); // Remove dead functions.
manager->add(llvm::createArgumentPromotionPass());
manager->add(llvm::createInstructionCombiningPass());
manager->add(llvm::createJumpThreadingPass());
manager->add(llvm::createScalarReplAggregatesPass());
manager->add(llvm::createFunctionAttrsPass()); // Add nocapture.
manager->add(llvm::createGlobalsModRefPass()); // IP alias analysis.
manager->add(llvm::createLICMPass()); // Hoist loop invariants.
manager->add(llvm::createGVNPass()); // Remove redundancies.
manager->add(llvm::createMemCpyOptPass()); // Remove dead memcpys.
manager->add(llvm::createDeadStoreEliminationPass());
manager->add(llvm::createInstructionCombiningPass());
manager->add(llvm::createJumpThreadingPass());
manager->add(llvm::createCFGSimplificationPass());
}
}
bool CPUProgram::build(llvm::Module *module, std::string *binary_str)
{
// Nothing to build
p_module = module;
return true;
}
bool CPUProgram::initJIT()
{
if (p_jit)
return true;
if (!p_module)
return false;
// Create the JIT
std::string err;
p_jit = llvm::EngineBuilder(p_module)
.setErrorStr(&err)
.setUseMCJIT(true)
.setMCJITMemoryManager(new ClientMemoryManager())
.create();
if (!p_jit)
{
std::cout << "Unable to create a JIT: " << err << std::endl;
return false;
}
return true;
}
llvm::ExecutionEngine *CPUProgram::jit() const
{
return p_jit;
}
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