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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/99324] [8/9/10/11 Regression] ICE in mark_addressable, at
 gimple-expr.c:918 since r6-314
Date: Tue, 02 Mar 2021 10:02:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99324

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Wouldn't it be better to remove the mark_addressable call from build_va_arg=
 and
call {c,cxx}_mark_addressable in the callers instead.
That way we'd also e.g. diagnose invalid (on i686-linux):
register __builtin_va_list ap __asm ("%ebx");

void
foo (int a, ...)
{
  __builtin_va_arg (ap, int);
}=