Hi,

this is a regression present on the mainline/4.6/4.5 branches.  I overlooked 
the -mregnames business when I changed the probe_stack pattern and, while 
this silently works on most platforms, this breaks on Darwin because of the 
awkward assembler.

Tested on PowerPC/Darwin by Iain and on PowerPC/Linux by me.  OK for mainline 
and the 4.6/4.5 branches?


2011-09-06  Eric Botcazou  <ebotcazou@adacore.com>
	    Iain Sandoe  <developer@sandoe-acoustics.co.uk>

	PR target/50091
	* config/rs6000/rs6000.md (probe_stack): Use explicit operand.
	* config/rs6000/rs6000.c (output_probe_stack_range): Likewise.


-- 
Eric Botcazou