Nikita Popov 6515db205a [InstCombine] Simplify cttz/ctlz + icmp ugt/ult ...

Followup to D55745, this time handling comparisons with ugt and ult
predicates (which are the canonical forms for non-equality predicates).

For ctlz we can convert into a simple icmp, for cttz we can convert
into a mask check.

Differential Revision: https://reviews.llvm.org/D56355

llvm-svn: 351645

2019-01-19 09:56:01 +00:00

217 KiB

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