--- Comment #3 from Jakub Jelinek <jakub at gcc dot> ---
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)?
Do we want some -Wpsabi warning for this?

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