backport: re PR target/65787 (Miscompile due to bad vector swap optimization for...

backport: re PR target/65787 (Miscompile due to bad vector swap optimization for little endian)

[gcc]

2015-04-18  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
	    Jakub Jelinek  <jakub@redhat.com>

	Backport from mainline r222205
	2015-04-17  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
	            Jakub Jelinek  <jakub@redhat.com>

	PR target/65787
	* config/rs6000/rs6000.c (rtx_is_swappable_p): Ensure that a
	subsequent SH_NONE operand does not overwrite an existing *special
	value.
	(adjust_extract): Handle case where a vec_extract operation is
	wrapped in a PARALLEL.

[gcc/testsuite]

2015-04-18  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	Backport from mainline r222205
	2015-04-17  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/65787
	* gcc.target/powerpc/pr65787.c: New.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
From-SVN: r222221