[all-commits] [llvm/llvm-project] b543d2: [InstCombine] Add one use limitation for (X * C2)...

chenglin.bi via All-commits all-commits at lists.llvm.org
Thu Apr 21 09:34:05 PDT 2022

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b543d28df7b067dcda833c717a59faa28c1151a1
  Author: chenglin.bi <chenglin.bi at cixcomputing.com>
  Date:   2022-04-22 (Fri, 22 Apr 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
    M llvm/test/Transforms/InstCombine/apint-shift.ll

  Log Message:
  [InstCombine] Add one use limitation for  (X * C2) << C1 --> X * (C2 << C1)

Follow up D123453, add one-use limitation for
(X * C2) << C1 --> X * (C2 << C1)
to make consistent with
lshr (mul nuw x, MulC), ShAmtC -> mul nuw x, (MulC >> ShAmtC)

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D124183

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