https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100955
Xi Ruoyao <xry111 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2023-03-23
Version|12.0 |13.0
--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
This is happening on many ports (see https://godbolt.org/z/n1YqWq9c9) and it
seems not trivial to fix. stdarg pass already checks if the va_list escapes,
and if not we should avoid saving the register onto the stack if possible. But
currently there seems no way to take this opportunity in target code
(TARGET_SETUP_INCOMING_VARARGS mandates a store on stack and disallows to use
registers instead of stack).
