[PATCH] D42265: [X86] Add an override of targetShrinkDemandedConstant to limit the damage that shrinkdemandedbits can do to zext_in_reg operations

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

Seems like a good change. I was afraid of getting regressions from something like this, but the loosening of the tablegen matcher seems to be handling those cases.

Is it possible to concoct smaller, dedicated tests that show the wins?


Repository:
  rL LLVM

https://reviews.llvm.org/D42265