diff options
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index 415f86e893..a34d5b3fe5 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -2745,19 +2745,17 @@ bool LoopVectorizationLegality::canVectorize() { 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 @@ bool LoopVectorizationLegality::canVectorize() { } // 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. " << |