LLVM
15.0.0git
include
llvm
Transforms
Scalar
InstSimplifyPass.h
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//===- InstSimplifyPass.h ---------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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///
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/// Defines passes for running instruction simplification across chunks of IR.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_SCALAR_INSTSIMPLIFYPASS_H
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#define LLVM_TRANSFORMS_SCALAR_INSTSIMPLIFYPASS_H
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#include "
llvm/IR/PassManager.h
"
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namespace
llvm
{
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/// Run instruction simplification across each instruction in the function.
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///
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/// Instruction simplification has useful constraints in some contexts:
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/// - It will never introduce *new* instructions.
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/// - There is no need to iterate to a fixed point.
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///
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/// Many passes use instruction simplification as a library facility, but it may
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/// also be useful (in tests and other contexts) to have access to this very
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/// restricted transform at a pass granularity. However, for a much more
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/// powerful and comprehensive peephole optimization engine, see the
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/// `instcombine` pass instead.
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class
InstSimplifyPass
:
public
PassInfoMixin
<InstSimplifyPass> {
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public
:
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PreservedAnalyses
run
(
Function
&
F
,
FunctionAnalysisManager
&AM);
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};
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}
// end namespace llvm
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#endif // LLVM_TRANSFORMS_SCALAR_INSTSIMPLIFYPASS_H
llvm::PreservedAnalyses
A set of analyses that are preserved following a run of a transformation pass.
Definition:
PassManager.h:152
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition:
AddressRanges.h:17
llvm::PassInfoMixin
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition:
PassManager.h:371
llvm::Function
Definition:
Function.h:60
F
#define F(x, y, z)
Definition:
MD5.cpp:55
llvm::InstSimplifyPass::run
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Definition:
InstSimplifyPass.cpp:129
PassManager.h
llvm::AnalysisManager
A container for analyses that lazily runs them and caches their results.
Definition:
InstructionSimplify.h:42
llvm::InstSimplifyPass
Run instruction simplification across each instruction in the function.
Definition:
InstSimplifyPass.h:32
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