Commits on Mar 5, 2024

1. [InstCombine] Fix infinite loop in select equivalence fold …

   When replacing with a non-constant, it's possible that the result
   of the simplification is actually more complicated than the original,
   and may result in an infinite combine loop.
   
   Mitigate the issue by requiring that either the replacement or
   simplification result is constant, which should ensure that it's
   simpler. This is a very simple check that doesn't seem to cause
   many regressions in our own tests, so let's see if it's good
   enough.
   
   Fixes llvm#83127.

   

   nikic committed Mar 5, 2024
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