This patch is the rs6000.h changes. It makes the IEEE 128-bit floating point
type that can go in vector registers a 'vector' type, so that the address code
in rs6000.c that determines whether to use VSX addressing works. In addition, I
made IEEE 128-bit floating point tie with vectors and not with other scalar
floats.

I have built the compiler with this patch applied, and run bootstrap and
regression tests with all of the patches installed.  Is it ok to install on the
trunk?

2015-10-22  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.h (ALTIVEC_VECTOR_MODE): Add IEEE 128-bit
	floating point modes that can go in vector registers.
	(MODES_TIEABLE_P): Move tests for vector modes before tests for
	scalar floating point, so that IEEE 128-bit floating point that
	can go in vector registers bind with vectors and not FP.
	(struct rs6000_args): Add libcall field.


-- 
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797