Florian Hahn 043b04acff Reapply "[VPlan] Fold NOT into predicate of wide compares." (#130347) ...

This reverts commit 8dd160f476.

The recommit contains an adjustment to planContainsAdditionalSimplifications,
which considers changes to the original predicate for compares.

Original commit message:

Add simplification to fold negation into a compare, if the negation is
the only user of the compare. This removes a number of redundant
negations.

Alive2 Proofs for FPCMP test changes:  https://alive2.llvm.org/ce/z/WGDz9U

PR: https://github.com/llvm/llvm-project/pull/129430

2025-04-28 20:01:37 +01:00

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