re PR target/50911 (assertion failure in expand_vec_perm_interleave2 with -msse)

re PR target/50911 (assertion failure in expand_vec_perm_interleave2 with -msse)

	PR target/50911
	* config/i386/i386.c (expand_vec_perm_interleave2): If d->vmode is
	V4SImode, !TARGET_SSE2 and punpck[lh]* is needed, change dremap.vmode
	to V4SFmode.

	* gcc.dg/torture/vshuf-16.inc: Add interleave low and high
	permutations.
	* gcc.dg/torture/vshuf-32.inc: Likewise.
	* gcc.dg/torture/vshuf-4.inc: Likewise.
	* gcc.dg/torture/vshuf-8.inc: Likewise.

From-SVN: r181238