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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/93385] [10/11 Regression] wrong code with u128 modulo at
 -O2 -fno-dce -fno-ipa-cp -fno-tree-dce
Date: Mon, 28 Jun 2021 17:30:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D93385

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[10/11/12 Regression] wrong |[10/11 Regression] wrong
                   |code with u128 modulo at    |code with u128 modulo at
                   |-O2 -fno-dce -fno-ipa-cp    |-O2 -fno-dce -fno-ipa-cp
                   |-fno-tree-dce               |-fno-tree-dce

--- Comment #47 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed on master.

Given the size of the fix, it is clearly not suitable for backporting.  This
bug is likely to remain unfixed on GCC 10 and 11, which however should not =
hurt
anybody who does not explicitly disable DCE.  (An unappealing but realistic
alternative is to add the bail out from comment #11 to those branches.)=