Kerry McLaughlin 05edfc5475 [SVE][CodeGen] Add DAG combines for s/zext_masked_gather ...

This patch adds the following DAGCombines, which apply if isVectorLoadExtDesirable() returns true:
 - fold (and (masked_gather x)) -> (zext_masked_gather x)
 - fold (sext_inreg (masked_gather x)) -> (sext_masked_gather x)

LowerMGATHER has also been updated to fetch the LoadExtType associated with the
gather and also use this value to determine the correct masked gather opcode to use.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92230

2020-12-09 11:53:19 +00:00

871 KiB

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