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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/100799] Stackoverflow in optimized code on PPC
Date: Tue, 27 Feb 2024 07:26:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100799

--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Either tree parmdef =3D ssa_default_def (cfun, parm) is NULL, or has_zero_u=
ses
(parmdef).
Not sure if has_zero_uses will work properly after some bbs are converted f=
rom
GIMPLE to RTL, but maybe it will, I think the expansion generally doesn't
gsi_remove statements it expands nor calls update_stmt on them.  One could
always also just compute in generic code at the start of expansion the numb=
er
of unused DECL_HIDDEN_STRING_LENGTH PARM_DECLs at the end of the argument l=
ist,
save that as a flag in struct function or where and let the backends use it
from there.=