[PATCH] D47980: [InstCombine] Fold (x << y) >> y -> x & (-1 >> y)

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri updated this revision to Diff 150662.
lebedev.ri added reviewers: mareko, bogner, rampitec.
lebedev.ri added a comment.
Herald added a subscriber: nhaehnle.

Ok, that didn't go as planned :)
Did not notice the AMDGPU test change (yay tests), so the bots broke.
Did not evaluate the effect of that change on the AMDGPU codegen yet, will do tomorrow.


Repository:
  rL LLVM

https://reviews.llvm.org/D47980

Files:
  lib/Transforms/InstCombine/InstCombineShifts.cpp
  test/Transforms/InstCombine/AMDGPU/amdgcn-intrinsics.ll
  test/Transforms/InstCombine/canonicalize-shl-lshr-to-masking.ll

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