[PATCH] D90156: [PowerPC] Do not fold `cmp(d|w)` and `subf` instruction to `subf.` if `nsw` is not present

[Nemanja Ivanovic via Phabricator via llvm-commits]

nemanjai accepted this revision.
nemanjai added a comment.
This revision is now accepted and ready to land.

LGTM with a minor nit.



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Comment at: llvm/lib/Target/PowerPC/PPCInstrInfo.cpp:2131
 
+  // This transformation should not be performed if `nsw` is missing. Since if
+  // there is overflow, CR bits do not reflect correct order.
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Please add a note why this is OK when `equalityOnly` is set.


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  https://reviews.llvm.org/D90156/new/

https://reviews.llvm.org/D90156