commit a1b8e2c7257fb635a89b39274789e120ff3c85ba
author Simon Pilgrim <llvm-dev@redking.me.uk> Sat Jan 07 15:37:50 2017 +0000
committer Simon Pilgrim <llvm-dev@redking.me.uk> Sat Jan 07 15:37:50 2017 +0000
tree c20f2b47c849697cebf6d697af879ee12c1ef66d
parent ffff5f16a4b2e36dae369997fa08cf8b33e777f8

[X86][AVX512] Use lowerShuffleAsRepeatedMaskAndLanePermute for non-VBMI v64i8 shuffles (PR31470)

llvm-svn: 291347

llvm/lib/Target/X86/X86TargetTransformInfo.cpp

diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
index de48394..9167c09 100644
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -639,8 +639,7 @@
 
     { TTI::SK_Reverse,          MVT::v32i16, 1 }, // vpermw
     { TTI::SK_Reverse,          MVT::v16i16, 1 }, // vpermw
-    { TTI::SK_Reverse,          MVT::v64i8,  6 }, // vextracti64x4 + 2*vperm2i128
-                                                  // + 2*pshufb + vinserti64x4
+    { TTI::SK_Reverse,          MVT::v64i8,  2 }, // pshufb + vshufi64x2
 
     { TTI::SK_PermuteSingleSrc, MVT::v32i16, 1 }, // vpermw
     { TTI::SK_PermuteSingleSrc, MVT::v16i16, 1 }, // vpermw