LLVM  14.0.0git
EarlyCSE.h
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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 
19 namespace llvm {
20 
21 class 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.
30 struct EarlyCSEPass : PassInfoMixin<EarlyCSEPass> {
32 
33  /// Run the pass over the function.
35  void printPipeline(raw_ostream &OS,
36  function_ref<StringRef(StringRef)> MapClassName2PassName);
37 
39 };
40 
41 } // end namespace llvm
42 
43 #endif // LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
llvm::PreservedAnalyses
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:155
llvm
---------------------— PointerInfo ------------------------------------—
Definition: AllocatorList.h:23
llvm::EarlyCSEPass::printPipeline
void printPipeline(raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)
Definition: EarlyCSE.cpp:1645
llvm::PassInfoMixin
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:374
llvm::Function
Definition: Function.h:61
llvm::EarlyCSEPass::EarlyCSEPass
EarlyCSEPass(bool UseMemorySSA=false)
Definition: EarlyCSE.h:31
F
#define F(x, y, z)
Definition: MD5.cpp:56
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:53
llvm::EarlyCSEPass::run
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Run the pass over the function.
Definition: EarlyCSE.cpp:1624
llvm::function_ref
An efficient, type-erasing, non-owning reference to a callable.
Definition: STLExtras.h:168
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:58
llvm::EarlyCSEPass::UseMemorySSA
bool UseMemorySSA
Definition: EarlyCSE.h:38
PassManager.h
llvm::AnalysisManager
A container for analyses that lazily runs them and caches their results.
Definition: InstructionSimplify.h:44
llvm::codeview::PublicSymFlags::Function
@ Function
llvm::EarlyCSEPass
A simple and fast domtree-based CSE pass.
Definition: EarlyCSE.h:30