[Bug bootstrap/77359] [7 Regression] AIX bootstrap failure due to alignment of stack pointer + STACK_DYNAMIC_OFFSET

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77359

--- Comment #10 from David Edelsohn <dje at gcc dot gnu.org> ---
I was thinking more of

#define STACK_DYNAMIC_OFFSET(FUNDECL)                                   \
  (RS6000_ALIGN (crtl->outgoing_args_size,                              \
                 (TARGET_ALTIVEC || TARGET_VSX || TARGET_AIX) ? 16 : 8) \
   + (STACK_POINTER_OFFSET))

But this still leaves the Linux problem.  Maybe STACK_DYNAMIC_OFFSET should use
16, except for PPC32 Linux without Altivec.