https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77359
David Edelsohn <dje at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target|powerpc-ibm-aix* |powerpc*-*-* --- Comment #12 from David Edelsohn <dje at gcc dot gnu.org> --- What do you mean by size of a stack slot? AIX stack pointer alignment was increased to quadword, to allow for Altivec. It doesn't really refer to the alignment of objects on the stack. I assume that those followed the type alignment rules in the ABI.