Simon Pilgrim 54b20cbb95 [DAG] computeKnownBits - abds(x, y) will be zero in the upper bits if x and y are sign-extended (#94448) ...

As reported on #94442 - if x and y have more than one signbit, then the upper bits of its absolute value are guaranteed to be zero

Sibling PR to #94382

Alive2: https://alive2.llvm.org/ce/z/7_z2Vc

Fixes #94442

2024-06-05 11:57:55 +01:00

489 KiB

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