re PR target/88785 (ICE in as_a, at machmode.h:353)

re PR target/88785 (ICE in as_a, at machmode.h:353)

	PR target/88785
	* config/i386/sse.md (float<floatunssuffix>v2div2sf2): Turn into
	define_expand.
	(*float<floatunssuffix>v2div2sf2): New define_insn.
	(float<floatunssuffix>v2div2sf2_mask): Turn into define_expand.
	(*float<floatunssuffix>v2div2sf2_mask): New define_insn.
	(*float<floatunssuffix>v2div2sf2_mask_1): Replace
	subrtxes (const_vector:V2SF [(const_int 0) (const_int 0)]) with
	match_operands with "const0_operand" "C".

	* g++.target/i386/pr88785.C: New test.

From-SVN: r267825