tree ac4bf80dd1215309a62eff909357959c1b63675f
parent b7aa2ef391f765dccd54d5a28ec4762a03ce090c
author Roman Lebedev <lebedev.ri@gmail.com> 1571604697 +0000
committer Roman Lebedev <lebedev.ri@gmail.com> 1571604697 +0000

[NFC][InstCombine] conditional sign-extend of high-bit-extract: 'and' pat. can be 'or' pattern.

In this pattern, all the "magic" bits that we'd add are all
high sign bits, and in the value we'd be adding to they are all unset,
not unexpectedly, so we can have an `or` there:
https://rise4fun.com/Alive/ups

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375377 91177308-0d34-0410-b5e6-96231b3b80d8