rs6000.c (special_handling_values): Add SH_SPLAT.

rs6000.c (special_handling_values): Add SH_SPLAT.

[gcc]

2014-09-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (special_handling_values):  Add SH_SPLAT.
	(rtx_is_swappable_p): Convert UNSPEC cascading ||s to a switch
	statement; allow optimization of UNSPEC_VSPLT_DIRECT with special
	handling SH_SPLAT.
	(adjust_extract): Fix test for VEC_DUPLICATE case; fix adjustment
	of extracted lane.
	(adjust_splat): New function.
	(handle_special_swappables): Call adjust_splat for SH_SPLAT.
	(dump_swap_insn_table): Add case for SH_SPLAT.

[gcc/testsuite]

2014-09-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.target/powerpc/swaps-p8-16.c: New test.

From-SVN: r215019