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e3502119ae
Mostly straightforward changes; we just didn't do the computation before. One sort of interesting change in LoopUnroll.cpp: we weren't handling dominance for children of the loop latch correctly, but foldBlockIntoPredecessor hid the problem for complete unrolling. Currently punting on loop peeling; made some minor changes to isolate that problem to LoopUnrollPeel.cpp. Adds a flag -unroll-verify-domtree; it verifies the domtree immediately after we finish updating it. This is on by default for +Asserts builds. Differential Revision: https://reviews.llvm.org/D28073 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292447 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
//===- llvm/Transforms/Utils/UnrollLoop.h - Unrolling utilities -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines some loop unrolling utilities. It does not define any
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// actual pass or policy, but provides a single function to perform loop
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// unrolling.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H
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#define LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H
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// Needed because we can't forward-declare the nested struct
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// TargetTransformInfo::UnrollingPreferences
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#include "llvm/Analysis/TargetTransformInfo.h"
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namespace llvm {
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class StringRef;
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class AssumptionCache;
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class DominatorTree;
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class Loop;
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class LoopInfo;
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class LPPassManager;
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class MDNode;
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class Pass;
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class OptimizationRemarkEmitter;
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class ScalarEvolution;
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typedef SmallDenseMap<const Loop *, Loop *, 4> NewLoopsMap;
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const Loop* addClonedBlockToLoopInfo(BasicBlock *OriginalBB,
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BasicBlock *ClonedBB, LoopInfo *LI,
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NewLoopsMap &NewLoops);
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bool UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool Force,
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bool AllowRuntime, bool AllowExpensiveTripCount,
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bool PreserveCondBr, bool PreserveOnlyFirst,
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unsigned TripMultiple, unsigned PeelCount, LoopInfo *LI,
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ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC,
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OptimizationRemarkEmitter *ORE, bool PreserveLCSSA);
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bool UnrollRuntimeLoopRemainder(Loop *L, unsigned Count,
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bool AllowExpensiveTripCount,
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bool UseEpilogRemainder, LoopInfo *LI,
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ScalarEvolution *SE, DominatorTree *DT,
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bool PreserveLCSSA);
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void computePeelCount(Loop *L, unsigned LoopSize,
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TargetTransformInfo::UnrollingPreferences &UP);
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bool peelLoop(Loop *L, unsigned PeelCount, LoopInfo *LI, ScalarEvolution *SE,
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DominatorTree *DT, AssumptionCache *AC, bool PreserveLCSSA);
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MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name);
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}
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#endif
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