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f15b696b79
Summary: CUDA driver can unroll loops when jit-compiling PTX. To prevent CUDA driver from unrolling a loop marked with llvm.loop.unroll.disable is not unrolled by CUDA driver, we need to emit .pragma "nounroll" at the header of that loop. This patch also extracts getting unroll metadata from loop ID metadata into a shared helper function. Test Plan: test/CodeGen/NVPTX/nounroll.ll Reviewers: eliben, meheff, jholewinski Reviewed By: jholewinski Subscribers: jholewinski, llvm-commits Differential Revision: http://reviews.llvm.org/D7041 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227703 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
1.2 KiB
C++
41 lines
1.2 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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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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class AssumptionCache;
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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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bool UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool AllowRuntime,
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unsigned TripMultiple, LoopInfo *LI, Pass *PP,
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LPPassManager *LPM, AssumptionCache *AC);
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bool UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
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LPPassManager* LPM);
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const MDNode *GetUnrollMetadata(const MDNode *LoopID, StringRef Name);
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}
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#endif
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