Florian Hahn c92ff61cee [Local] Move OverflowTracking to Local.h, move logic to helpers (NFC) (#140403) ...

Move parts of the logic used by Reassociate to OverflowTracking
(mergeFlags & applyFlags) and move the definition to Local.h.

For now it just moves the NUW/NSW handling, as this matches the uses in
LICM. I'll look into the FP math handling separately, as it looks like
there's a difference between Reassociate (takes all flags from I, while
LICM takes the intersection of the flags on both instructions).

PR: https://github.com/llvm/llvm-project/pull/140403

2025-05-19 21:47:50 +01:00

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