1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/*========================== 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>();
AU.addRequired<CodeGenContextWrapper>();
}
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);
};
} // namespace IGC
|
