From de26195f3c09f7815161037b3227c34c6cc0afdb Mon Sep 17 00:00:00 2001 From: Nadav Rotem Date: Fri, 21 Jun 2013 04:18:13 +0000 Subject: [PATCH] SLP Vectorizer: do not search for store-chains that are wider than the vector-register size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184527 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Vectorize/VecUtils.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/lib/Transforms/Vectorize/VecUtils.cpp b/lib/Transforms/Vectorize/VecUtils.cpp index 16189860420..3db4adf95c8 100644 --- a/lib/Transforms/Vectorize/VecUtils.cpp +++ b/lib/Transforms/Vectorize/VecUtils.cpp @@ -141,9 +141,11 @@ bool BoUpSLP::vectorizeStoreChain(ArrayRef Chain, int CostThreshold) { } } - if (Changed) - return true; + if (Changed || ChainLen > VF) + return Changed; + // Handle short chains. This helps us catch types such as <3 x float> that + // are smaller than vector size. int Cost = getTreeCost(Chain); if (Cost < CostThreshold) { DEBUG(dbgs() << "SLP: Found store chain cost = " << Cost