Sanjay Patel 444f08c832 [InstCombine] fold icmp of truncated left shift, part 2 ...

(trunc (1 << Y) to iN) == 2**C --> Y == C
(trunc (1 << Y) to iN) != 2**C --> Y != C
https://alive2.llvm.org/ce/z/xnFPo5

Follow-up to d9e1f9d759. This was a suggested
enhancement mentioned in issue #51889.

2022-09-08 12:44:02 -04:00

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