[PATCH] D117406: [DAGCombiner] Adjust some checks in DAGCombiner::reduceLoadWidth

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope updated this revision to Diff 400773.
bjope added a comment.
Herald added a subscriber: pengfei.

Rebased (now including the BSWAP fold from D117508 <https://reviews.llvm.org/D117508> to avoid regression in a PPC test case).

Also added a new X86 test as a regression test for new fold when the shift
count isn't a multiple of the narrowed load width.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D117406/new/

https://reviews.llvm.org/D117406

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/ARM/shift-combine.ll
  llvm/test/CodeGen/X86/combine-srl-load.ll

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