[PATCH] Loop Vectorizer Debug Info

[Renato Golin]

Thanks Arnold, r192460.

--renato


On 11 October 2013 17:11, Arnold Schwaighofer <aschwaighofer at apple.com>wrote:

> LGTM.
>
> Thanks.
>
> On Oct 11, 2013, at 9:45 AM, Renato Golin <renato.golin at linaro.org> wrote:
>
> > Hi nadav,
> >
> > Just moving code around to make it easier to spot basic-blocks of loops
> that can't be if-converted. No functional change.
> >
> > http://llvm-reviews.chandlerc.com/D1897
> >
> > Files:
> >  lib/Transforms/Vectorize/LoopVectorize.cpp
> >
> > Index: lib/Transforms/Vectorize/LoopVectorize.cpp
> > ===================================================================
> > --- lib/Transforms/Vectorize/LoopVectorize.cpp
> > +++ lib/Transforms/Vectorize/LoopVectorize.cpp
> > @@ -2745,19 +2745,17 @@
> >   if (!TheLoop->getExitingBlock())
> >     return false;
> >
> > -  unsigned NumBlocks = TheLoop->getNumBlocks();
> > +  // We need to have a loop header.
> > +  DEBUG(dbgs() << "LV: Found a loop: " <<
> > +        TheLoop->getHeader()->getName() << '\n');
> >
> >   // Check if we can if-convert non single-bb loops.
> > +  unsigned NumBlocks = TheLoop->getNumBlocks();
> >   if (NumBlocks != 1 && !canVectorizeWithIfConvert()) {
> >     DEBUG(dbgs() << "LV: Can't if-convert the loop.\n");
> >     return false;
> >   }
> >
> > -  // We need to have a loop header.
> > -  BasicBlock *Latch = TheLoop->getLoopLatch();
> > -  DEBUG(dbgs() << "LV: Found a loop: " <<
> > -        TheLoop->getHeader()->getName() << '\n');
> > -
> >   // ScalarEvolution needs to be able to find the exit count.
> >   const SCEV *ExitCount = SE->getBackedgeTakenCount(TheLoop);
> >   if (ExitCount == SE->getCouldNotCompute()) {
> > @@ -2766,6 +2764,7 @@
> >   }
> >
> >   // Do not loop-vectorize loops with a tiny trip count.
> > +  BasicBlock *Latch = TheLoop->getLoopLatch();
> >   unsigned TC = SE->getSmallConstantTripCount(TheLoop, Latch);
> >   if (TC > 0u && TC < TinyTripCountVectorThreshold) {
> >     DEBUG(dbgs() << "LV: Found a loop with a very small trip count. " <<
> > <D1897.1.patch>_______________________________________________
> > llvm-commits mailing list
> > llvm-commits at cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
>
>
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