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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "Compiler/CISACodeGen/DeSSA.hpp"
#include "Compiler/CISACodeGen/PatternMatchPass.hpp"
#include "Compiler/MetaDataUtilsWrapper.h"
#include "common/LLVMWarningsPush.hpp"
#include <llvm/Pass.h>
#include "common/LLVMWarningsPop.hpp"
namespace IGC
{
class CodeGenContextWrapper;
class BlockCoalescing : public llvm::FunctionPass
{
public:
static char ID;
BlockCoalescing();
virtual void getAnalysisUsage(llvm::AnalysisUsage& AU) const override {
AU.setPreservesAll();
AU.addRequired<DeSSA>();
AU.addRequired<CodeGenPatternMatch>();
AU.addRequired<MetaDataUtilsWrapper>();
}
bool runOnFunction(llvm::Function& F) override;
virtual llvm::StringRef getPassName() const override {
return "BlockCoalescing";
}
bool IsEmptyBlock(llvm::BasicBlock* bb);
/// look for the next none-empty basick block
llvm::BasicBlock* SkipEmptyBasicBlock(llvm::BasicBlock* bb);
/// look for the destination to jump to if the block is empty
llvm::BasicBlock* FollowEmptyBlock(llvm::BasicBlock* bb);
protected:
llvm::DenseSet<llvm::BasicBlock*> m_emptyBlocks;
private:
bool hasEmptyBlockLoop(llvm::BasicBlock* EmptyBlock);
};
}
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