From 83be7b0dd3ae9a3cb22d36ae4c1775972553b94b Mon Sep 17 00:00:00 2001 From: Nadav Rotem Date: Wed, 9 Jan 2013 01:15:42 +0000 Subject: Cost Model: Move the 'max unroll factor' variable to the TTI and add initial Cost Model support on ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171928 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Vectorize/LoopVectorize.cpp | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'lib/Transforms/Vectorize/LoopVectorize.cpp') diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index 9c82cb8dca..c29f416be7 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -116,9 +116,6 @@ static const unsigned RuntimeMemoryCheckThreshold = 4; /// This is the highest vector width that we try to generate. static const unsigned MaxVectorSize = 8; -/// This is the highest Unroll Factor. -static const unsigned MaxUnrollSize = 4; - namespace { // Forward declarations. @@ -2715,6 +2712,8 @@ LoopVectorizationCostModel::selectUnrollFactor(bool OptForSize, UF = std::min(UF, (MaxLoopSizeThreshold / R.NumInstructions)); // Clamp the unroll factor ranges to reasonable factors. + unsigned MaxUnrollSize = TTI.getMaximumUnrollFactor(); + if (UF > MaxUnrollSize) UF = MaxUnrollSize; else if (UF < 1) -- cgit v1.2.3-18-g5258