[all-commits] [llvm/llvm-project] 6aa3fc: Revert "[InstCombine] propagate 'nsw' on pointer d...

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  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 6aa3fc4a5b88bd0175212e06b183c87cf87c306c
      https://github.com/llvm/llvm-project/commit/6aa3fc4a5b88bd0175212e06b183c87cf87c306c
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2020-09-11 (Fri, 11 Sep 2020)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
    M llvm/test/Transforms/InstCombine/sub-gep.ll
    M llvm/test/Transforms/InstCombine/sub.ll

  Log Message:
  -----------
  Revert "[InstCombine] propagate 'nsw' on pointer difference of 'inbounds' geps (PR47430)"

This reverts commit 324a53205a3af979e3de109fdd52f91781816cba.

On closer examination of at least one of the test diffs,
this does not appear to be correct in all cases. Even the
existing 'nsw' creation may be wrong based on this example:
https://alive2.llvm.org/ce/z/uL4Hw9
https://alive2.llvm.org/ce/z/fJMKQS