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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "common/LLVMWarningsPush.hpp"
#include "llvm/Pass.h"
#include "llvm/Analysis/LoopInfo.h"
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/CodeGenPublic.h"
#include "Compiler/CISACodeGen/WIAnalysis.hpp"
namespace IGC {
namespace IGCMD {
class MetaDataUtils;
}
/// @brief This pass implements a heuristic to determine whether SIMD32 is profitable.
class Simd32ProfitabilityAnalysis : public llvm::FunctionPass {
public:
static char ID;
Simd32ProfitabilityAnalysis();
~Simd32ProfitabilityAnalysis() {}
virtual llvm::StringRef getPassName() const override { return "Simd32Profitability"; }
virtual bool runOnFunction(llvm::Function &F) override;
virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override {
AU.setPreservesAll();
AU.addRequired<WIAnalysis>();
AU.addRequired<llvm::LoopInfoWrapperPass>();
AU.addRequired<llvm::PostDominatorTreeWrapperPass>();
AU.addRequired<MetaDataUtilsWrapper>();
AU.addRequired<CodeGenContextWrapper>();
}
bool isSimd32Profitable() const { return m_isSimd32Profitable; }
bool isSimd16Profitable() const { return m_isSimd16Profitable; }
private:
llvm::Function *F;
llvm::PostDominatorTree *PDT;
llvm::LoopInfo *LI;
IGCMD::MetaDataUtils *pMdUtils;
WIAnalysis *WI;
bool m_isSimd32Profitable;
bool m_isSimd16Profitable;
unsigned getLoopCyclomaticComplexity();
bool checkSimd32Profitable(CodeGenContext *);
bool checkSimd16Profitable(CodeGenContext *);
unsigned estimateLoopCount(llvm::Loop *L);
unsigned estimateLoopCount_CASE1(llvm::Loop *L);
unsigned estimateLoopCount_CASE2(llvm::Loop *L);
bool checkPSSimd32Profitable();
void print(llvm::raw_ostream &OS) const;
};
} // namespace IGC
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