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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/100221] Takes two passes at DSE to remove
 some dead stores
Date: Tue, 11 Jan 2022 11:04:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100221

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note handling this special case doesn't resolve the issue in the original
testcase since the virtual operand setup is different there.  As said, DSE
is not set up to follow multiple paths to uses (sth akin to maybe_skip_until
for the CSE case), but we only try somewhat hard to reduce multiple paths
to one.=