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e59e4b3dc5
the latter to the Transforms library. While the loop PM uses an analysis to form the IR units, the current plan is to have the PM itself establish and enforce both loop simplified form and LCSSA. This would be a layering violation in the analysis library. Fundamentally, the idea behind the loop PM is to *transform* loops in addition to running passes over them, so it really seemed like the most natural place to sink this was into the transforms library. We can't just move *everything* because we also have loop analyses that rely on a subset of the invariants. So this patch splits the the loop infrastructure into the analysis management that has to be part of the analysis library, and the transform-aware pass manager. This also required splitting the loop analyses' printer passes out to the transforms library, which makes sense to me as running these will transform the code into LCSSA in theory. I haven't split the unittest though because testing one component without the other seems nearly intractable. Differential Revision: https://reviews.llvm.org/D28452 llvm-svn: 291662
36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
//===- LoopRotation.h - Loop Rotation -------------------------------------===//
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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 provides the interface for the Loop Rotation pass.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_SCALAR_LOOPROTATION_H
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#define LLVM_TRANSFORMS_SCALAR_LOOPROTATION_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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/// A simple loop rotation transformation.
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class LoopRotatePass : public PassInfoMixin<LoopRotatePass> {
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public:
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LoopRotatePass(bool EnableHeaderDuplication = true);
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PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
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LoopStandardAnalysisResults &AR, LPMUpdater &U);
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private:
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const bool EnableHeaderDuplication;
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};
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}
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#endif // LLVM_TRANSFORMS_SCALAR_LOOPROTATION_H
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