* ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): Implement
correct ABI for AltiVec vector arguments.
testsuite/ChangeLog:
* gdb.arch/altivec-abi.c (vec_func): Make use of intv_on_stack_f
when computing result.
* gdb.arch/altivec-abi.exp: Update expected results.