LLVM  10.0.0svn
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1 //===- LoopSimplifyCFG.cpp - Loop CFG Simplification 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 // This file implements the Loop SimplifyCFG Pass. This pass is responsible for
10 // basic loop CFG cleanup, primarily to assist other loop passes. If you
11 // encounter a noncanonical CFG construct that causes another loop pass to
12 // perform suboptimally, this is the place to fix it up.
13 //
14 //===----------------------------------------------------------------------===//
19 #include "llvm/Analysis/LoopInfo.h"
20 #include "llvm/IR/PassManager.h"
23 namespace llvm {
25 /// Performs basic CFG simplifications to assist other loop passes.
26 class LoopSimplifyCFGPass : public PassInfoMixin<LoopSimplifyCFGPass> {
27 public:
30 };
31 } // end namespace llvm
This class represents lattice values for constants.
Definition: AllocatorList.h:23
This header provides classes for managing a pipeline of passes over loops in LLVM IR...
Performs basic CFG simplifications to assist other loop passes.
The adaptor from a function pass to a loop pass computes these analyses and makes them available to t...
A CRTP mix-in to automatically provide informational APIs needed for passes.
Definition: PassManager.h:373
A set of analyses that are preserved following a run of a transformation pass.
Definition: PassManager.h:154
This class provides an interface for updating the loop pass manager based on mutations to the loop ne...
Represents a single loop in the control flow graph.
Definition: LoopInfo.h:509
PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM, LoopStandardAnalysisResults &AR, LPMUpdater &U)
A container for analyses that lazily runs them and caches their results.
This header defines various interfaces for pass management in LLVM.