https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95252

Kito Cheng <kito.cheng at gmail dot com> changed:

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--- Comment #8 from Kito Cheng <kito.cheng at gmail dot com> ---
It seems like because register rename thought all callee-saved register can be
used, because df_regs_ever_live_p return true for all callee-saved register
now, so seems like we really need an exact pattern to describe that, that's put
into my tomorrows TODO list.

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