LLVM 19.0.0git
EarlyCSE.h
Go to the documentation of this file.
1//===- EarlyCSE.h - Simple and fast CSE pass --------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// This file provides the interface for a simple, fast CSE pass.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
15#define LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
16
17#include "llvm/IR/PassManager.h"
18
19namespace llvm {
20
21class Function;
22
23/// A simple and fast domtree-based CSE pass.
24///
25/// This pass does a simple depth-first walk over the dominator tree,
26/// eliminating trivially redundant instructions and using instsimplify to
27/// canonicalize things as it goes. It is intended to be fast and catch obvious
28/// cases so that instcombine and other passes are more effective. It is
29/// expected that a later pass of GVN will catch the interesting/hard cases.
30struct EarlyCSEPass : PassInfoMixin<EarlyCSEPass> {
32
33 /// Run the pass over the function.
36 function_ref<StringRef(StringRef)> MapClassName2PassName);
37
39};
40
41} // end namespace llvm
42
43#endif // LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
#define F(x, y, z)
Definition: MD5.cpp:55
This header defines various interfaces for pass management in LLVM.
raw_pwrite_stream & OS
A container for analyses that lazily runs them and caches their results.
Definition: PassManager.h:348
A set of analyses that are preserved following a run of a transformation pass.
Definition: Analysis.h:109
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
An efficient, type-erasing, non-owning reference to a callable.
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
A simple and fast domtree-based CSE pass.
Definition: EarlyCSE.h:30
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Run the pass over the function.
Definition: EarlyCSE.cpp:1827
void printPipeline(raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)
Definition: EarlyCSE.cpp:1848
EarlyCSEPass(bool UseMemorySSA=false)
Definition: EarlyCSE.h:31
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:91