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

[vogt at linux dot vnet.ibm.com]

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

--- Comment #11 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
But does that really match the Abi?  On s390 (31 bit) we have an 8 byte aligned
stack pointer, but the size of a stack slot is just 4 bytes, so the offset from
the stack pointer may just be a multiple of 4.  The same may be the case on
other targets.