* optabs.c (expand_vec_perm): Avoid vector mode punning
	SUBREGs in SET_DEST.
	* expmed.c (store_bit_field_1): Likewise.
	* config/i386/sse.md (movdi_to_sse, vec_pack_sfix_trunc_v2df,
	vec_pack_sfix_v2df, vec_shl_<mode>, vec_shr_<mode>,
	vec_interleave_high<mode>, vec_interleave_low<mode>): Likewise.
	* config/i386/i386.c (ix86_expand_vector_move_misalign,
	ix86_expand_sse_movcc, ix86_expand_int_vcond, ix86_expand_vec_perm,
	ix86_expand_sse_unpack, ix86_expand_args_builtin,
	ix86_expand_vector_init_duplicate, ix86_expand_vector_set,
	emit_reduc_half, expand_vec_perm_blend, expand_vec_perm_pshufb,
	expand_vec_perm_interleave2, expand_vec_perm_pshufb2,
	expand_vec_perm_vpshufb2_vpermq,
	expand_vec_perm_vpshufb2_vpermq_even_odd, expand_vec_perm_even_odd_1,
	expand_vec_perm_broadcast_1, expand_vec_perm_vpshufb4_vpermq2,
	ix86_expand_sse2_mulv4si3, ix86_expand_pinsr): Likewise.
	(expand_vec_perm_palignr): Likewise.  Modify a copy of *d rather
	than *d itself.

From-SVN: r204274