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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 "llvmWrapper/IR/InstVisitor.h"
#include <llvm/IR/Instruction.h>
#include <llvmWrapper/IR/InstrTypes.h>
#include "common/LLVMWarningsPop.hpp"
namespace IGC
{
/// @brief Cap full unrolls of big loops to bound compile time.
class ClampLoopUnroll : public llvm::FunctionPass, public llvm::InstVisitor<ClampLoopUnroll>
{
public:
/// @brief Pass identification.
static char ID;
ClampLoopUnroll();
ClampLoopUnroll(unsigned maxUnrollFactor);
~ClampLoopUnroll() {}
virtual llvm::StringRef getPassName() const override
{
return "ClampLoopUnroll";
}
virtual bool runOnFunction(llvm::Function& F) override;
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override
{
AU.setPreservesCFG();
}
void visitTerminatorInst(IGCLLVM::TerminatorInst& I);
private:
unsigned m_MaxUnrollFactor;
bool m_Changed;
};
} // namespace IGC
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