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4f0b3bb42b
Patch by Brendon Cahoon! This extends the existing LoopUnroll and LoopUnrollPass. Brendon measured no regressions in the llvm test suite with -unroll-runtime enabled. This implementation works by using the existing loop unrolling code to unroll the loop by a power-of-two (default 8). It generates an if-then-else sequence of code prior to the loop to execute the extra iterations before entering the unrolled loop. llvm-svn: 146245
34 lines
1.0 KiB
C++
34 lines
1.0 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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namespace llvm {
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class Loop;
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class LoopInfo;
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class LPPassManager;
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bool UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool AllowRuntime,
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unsigned TripMultiple, LoopInfo* LI, LPPassManager* LPM);
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bool UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
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LPPassManager* LPM);
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}
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#endif
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