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[AArch64] Remove invalid uabdl patterns. #89272

Merged
merged 1 commit into from
Apr 19, 2024
Merged

[AArch64] Remove invalid uabdl patterns. #89272

merged 1 commit into from
Apr 19, 2024

Commits on Apr 18, 2024

  1. [AArch64] Remove invalid uabdl patterns. 

    These were added in https://reviews.llvm.org/D14208, which look like they
attempt to detect abs from xor+add+ashr. They do not appear to be detecting the
correct value for the src input though, which I think is intended to be the
sub(zext, zext) part of the pattern.  We have pattens from abs now, so the old
invalid patterns can be removed.

Fixes llvm#88784
    @davemgreen
    davemgreen committed Apr 18, 2024
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