re PR target/64204 (gcc.dg/c11-atomic-2.c fails on powerpc 64-bit little endian after -mupper-regs patches went in)

2014-12-08  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/64204
	* config/rs6000/rs6000.c (rs6000_emit_move): Do not split TFmode
	constant moves if -mupper-regs-df.

	* config/rs6000/rs6000.md (mov<mode>_64bit_dm): Optimize moving
	0.0L to TFmode.
	(movtd_64bit_nodm): Likewise.
	(mov<mode>_32bit, FMOVE128 case): Likewise.

From-SVN: r218505