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99dd11f7e8
Summary: This is largely NFC*, in preparation for utilizing ProfileSummaryInfo and BranchFrequencyInfo analyses. In this patch I am only doing the splitting for the New PM, but I can do the same for the legacy PM as a follow-on if this looks good. *Not NFC since for partial unrolling we lose the updates done to the loop traversal (adding new sibling and child loops) - according to Chandler this is not very useful for partial unrolling, but it also means that the debugging flag -unroll-revisit-child-loops no longer works for partial unrolling. Reviewers: chandlerc Subscribers: mehdi_amini, mzolotukhin, eraman, llvm-commits Differential Revision: https://reviews.llvm.org/D36157 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309886 91177308-0d34-0410-b5e6-96231b3b80d8
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//===- LoopUnrollPass.h -----------------------------------------*- 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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#ifndef LLVM_TRANSFORMS_SCALAR_LOOPUNROLLPASS_H
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#define LLVM_TRANSFORMS_SCALAR_LOOPUNROLLPASS_H
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Transforms/Scalar/LoopPassManager.h"
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namespace llvm {
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/// Loop unroll pass that only does full loop unrolling.
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class LoopFullUnrollPass : public PassInfoMixin<LoopFullUnrollPass> {
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const int OptLevel;
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public:
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explicit LoopFullUnrollPass(int OptLevel = 2) : OptLevel(OptLevel) {}
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PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
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LoopStandardAnalysisResults &AR, LPMUpdater &U);
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};
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/// Loop unroll pass that will support both full and partial unrolling.
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/// It is a function pass to have access to function and module analyses.
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/// It will also put loops into canonical form (simplified and LCSSA).
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class LoopUnrollPass : public PassInfoMixin<LoopUnrollPass> {
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const int OptLevel;
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public:
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/// This uses the target information (or flags) to control the thresholds for
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/// different unrolling stategies but supports all of them.
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explicit LoopUnrollPass(int OptLevel = 2) : OptLevel(OptLevel) {}
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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_LOOPUNROLLPASS_H
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