Caleb Zulawski 71dc3de533 [ARM] Improve min/max vector reductions on Arm
This patch adds some more efficient lowering for vecreduce.min/max under NEON,
using sequences of pairwise vpmin/vpmax to reduce to a single value.

This nearly resolves issues such as #50466, #40981, #38190.

Differential Revision: https://reviews.llvm.org/D146404
2023-03-22 16:00:19 +00:00
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