choikwa 463e93b95f Reapply [AMDGPU] prevent shrinking udiv/urem if either operand exceeds signed max (#119325) ...

This reverts commit 254d206ee2.

+Added a fix in ExpandDivRem24 to disqualify if DivNumBits exceed 24.

Original commit & msg:
ce6e955ac374f2b86cbbb73b2f32174dffd85f25.
Handle signed and unsigned path differently in getDivNumBits. Using
computeKnownBits, this rejects shrinking unsigned div/rem if operands
exceed signed max since we know NumSignBits will be always 0.

2024-12-12 15:24:34 -05:00

452 KiB

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