Craig Topper 768a1ca5ec [SelectionDAG] Fold abs(undef) to 0 instead of undef. ...

abs should only produce a positive value or the signed minimum
value. This means we can't fold abs(undef) to undef as that would
allow more values. Fold to 0 instead to match InstSimplify.

Fixes test mentioned in comment on pr55271.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D126174

2022-05-22 12:47:32 -07:00

432 KiB

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