altivec fix for starting_frame_offset

[David Edelsohn]

>>>>> Richard Henderson writes:

Richard> On Fri, Mar 01, 2002 at 04:14:52PM -0500, David Edelsohn wrote:
>> The patch defines FIRST_PARM_OFFSET as 0.  I am a little worried
>> about having GCC's concept of the argument pointer not point at the first
>> word in the argument area.

Richard> Yeah, but I don't see what else can be done.

	Is teaching locate_and_pad_parm that virtual_outgoing_args starts
with a fixed alignment offset from the stack pointer not worth
considering?

	If we go down the currently proposed path, I am more and more
inclined to make this approach conditional on TARGET_ALTIVEC_ABI as Aldy
originally proposed.

David