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From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/106187] armhf: Miscompilation at O2 level (O0
 / O1 are working)
Date: Wed, 27 Jul 2022 13:35:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106187

--- Comment #47 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Created attachment 53361
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53361&action=3Dedit
Possible patch

A slightly more thorough attempt to avoid the problem by detecting when the
alias sets are known to conflict.  We track through the list of same values
that CSELIB has recorded to find one that writes the same location (because=
 the
addresses are considered equal).=