[PATCH] D128159: [DAG] Enable scalable vectors handling in computeKnownBits

[Philip Reames via Phabricator via llvm-commits]

reames added a comment.

FYI, D137140 <https://reviews.llvm.org/D137140> so this patch is now mostly redundant.

I went back to look at the two parts I left out.  From the original commit message that was:
"Adds some simple known bits for ISD::STEP_VECTOR, which for power-two increments we know lower bit zeroes."
"The patterns for INDEX were made to work with adds or add-like-ors, to keep them working as intended."

I applied both of these changes locally, and saw no test difference.  Either individually or together.  Given that, I'm not going to push those further until we have a motivating example or a test in tree.  Feel free to split into it's own patch - with appropriate test - if desired.  I'd be happy to review.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D128159/new/

https://reviews.llvm.org/D128159