simplify-rtx.c (simplify_binary_operation_1): Optimize case of nested VEC_SELECTs that are inverses of each other.

[gcc]

2014-05-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* simplify-rtx.c (simplify_binary_operation_1): Optimize case of
	nested VEC_SELECTs that are inverses of each other.

[gcc/testsuite]

2014-05-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.target/powerpc/vsxcopy.c: New test.

From-SVN: r210644