[PATCH] D100865: [COST] Improve shuffle kind detection if shuffle mask is provided.

[Dave Green via Phabricator via llvm-commits]

dmgreen added inline comments.


================
Comment at: llvm/include/llvm/CodeGen/BasicTTIImpl.h:753
+    case TTI::SK_PermuteTwoSrc:
+      if (ShuffleVectorInst::isSelectMask(Mask))
+        return TTI::SK_Select;
----------------
Some of these Mask functions do not handle all sizes of mask. Do we need to be careful about shuffles that changesLength?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D100865/new/

https://reviews.llvm.org/D100865