[Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89972

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> Looking at
> struct S { long a[0] __attribute__ ((aligned (32))); };
> long double u;
> void baz (struct S *);
> void bar (long double x, struct S y, long double z)
> {
>   u = x + z;
>   baz (&y);
> }
> this doesn't ICE, but gcc emits loads from rsp+32 and rsp+64, while clang
> from rbp+16 and rbp+32.
> So, do we want to ignore the TYPE_EMPTY_P arguments even for argument
> alignment computations (both at the caller and callee)?

We should ask it in x86-64 psABI group.

> Do we want some -Wpsabi warning for this?

I think so.