rs6000.c (swap_web_entry): Enlarge special_handling bitfield.

rs6000.c (swap_web_entry): Enlarge special_handling bitfield.

[gcc]

2015-08-30  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (swap_web_entry): Enlarge
	special_handling bitfield.
	(special_handling_values): Add SH_XXPERMDI and SH_CONCAT.
	(rtx_is_swappable_p): Add handling for vec_select/vec_concat form
	that represents a general xxpermdi.
	(insn_is_swappable_p): Add handling for vec_concat of two
	doublewords, which maps to a specific xxpermdi.
	(adjust_xxpermdi): New function.
	(adjust_concat): Likewise.
	(handle_special_swappables): Call adjust_xxpermdi and
	adjust_concat.
	(dump_swap_insn_table): Handle SH_XXPERMDI and SH_CONCAT.

[gcc/testsuite]

2015-08-30  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.target/powerpc/swaps-p8-19.c: New test.

From-SVN: r227331