[PATCH] D67725: [InstCombine] dropRedundantMaskingOfLeftShiftInput(): pat. c/d/e with mask (PR42563)

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 221356.
lebedev.ri marked 2 inline comments as done.
lebedev.ri added a comment.

Avoid constantexpr pitfail.
I'm not adding a test - i tried to come up with it, but it does not match.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D67725/new/

https://reviews.llvm.org/D67725

Files:
  llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
  llvm/test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-c.ll
  llvm/test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-d.ll
  llvm/test/Transforms/InstCombine/partally-redundant-left-shift-input-masking-variant-e.ll

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