Simon Pilgrim 522b4bfe5b [DAG] Fold bitreverse(shl/srl(bitreverse(x),y)) -> srl/shl(x,y) (#89897) ...

Noticed while investigating GFNI per-element vector shifts (we can form SHL but not SRL/SRA)

Alive2: https://alive2.llvm.org/ce/z/fSH-rf

2024-05-06 11:13:05 +01:00

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