goldsteinn 877cb9a2ed [KnownBits] Make {s,u}{add,sub}_sat optimal (#113096) ...

Changes are:
    1) Make signed-overflow detection optimal
    2) For signed-overflow, try to rule out direction even if we can't
       totally rule out overflow.
    3) Intersect add/sub assuming no overflow with possible overflow
       clamping values as opposed to add/sub without the assumption.

2024-11-05 09:03:37 -06:00

41 KiB

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