https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111096
gccbug at provalid dot com changed:
What |Removed |Added
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CC| |gccbug at provalid dot com
--- Comment #4 from gccbug at provalid dot com ---
I think the ABI might have softened on this point at
https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst#general-purpose-registers.
It says the platform can let x29 be used as a general-purpose callee-saved
register in section 6.4.6.
