https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106602

Jeffrey A. Law <law at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |law at gcc dot gnu.org

--- Comment #7 from Jeffrey A. Law <law at gcc dot gnu.org> ---
There's some code in combine that's supposed to take advantage of REG_EQUAL
notes which is supposed to help with this kind of scenario.  Digging into that
might help.

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