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/*
* Copyright (c) 2012-2015 Advanced Micro Devices, Inc.
* All rights reserved.
*
* For use for simulation and test purposes only
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. 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 COPYRIGHT HOLDER OR 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.
*
* Author: Steve Reinhardt
*/
#ifndef __KERNEL_CFG_HH__
#define __KERNEL_CFG_HH__
#include <cstddef>
#include <cstdint>
#include <memory>
#include <set>
#include <vector>
class GPUStaticInst;
class HsailCode;
struct BasicBlock
{
BasicBlock(uint32_t num, GPUStaticInst* begin) :
id(num), size(0), firstInstruction(begin)
{
}
bool
isEntry() const
{
return !id;
}
bool
isExit() const
{
return !size;
}
/**
* Unique identifier for the block within a given kernel.
*/
const uint32_t id;
/**
* Number of instructions contained in the block
*/
size_t size;
/**
* Pointer to first instruction of the block.
*/
GPUStaticInst* firstInstruction;
/**
* Identifiers of the blocks that follow (are reachable from) this block.
*/
std::set<uint32_t> successorIds;
/**
* Identifiers of the blocks that will be visited from this block.
*/
std::set<uint32_t> postDominatorIds;
};
class ControlFlowInfo
{
public:
/**
* Compute immediate post-dominator instruction for kernel instructions.
*/
static void assignImmediatePostDominators(
const std::vector<GPUStaticInst*>& instructions);
private:
ControlFlowInfo(const std::vector<GPUStaticInst*>& instructions);
GPUStaticInst* lastInstruction(const BasicBlock* block) const;
BasicBlock* basicBlock(int inst_num) const;
BasicBlock* postDominator(const BasicBlock* block) const;
void createBasicBlocks();
void connectBasicBlocks();
void findPostDominators();
void findImmediatePostDominators();
void printBasicBlocks() const;
void printBasicBlockDot() const;
void printPostDominators() const;
void printImmediatePostDominators() const;
std::vector<std::unique_ptr<BasicBlock>> basicBlocks;
std::vector<GPUStaticInst*> instructions;
};
#endif // __KERNEL_CFG_HH__
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