[PATCH] D48789: [X86] Replace (32/64 - n) shift amounts with (neg n) since the shift amount is masked in hardware

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

Can you rebase this since https://reviews.llvm.org/D48767 has landed?
I think those **might** be affected by the patch.


https://reviews.llvm.org/D48789