re PR target/8343 ([m68k] [3.2 regression] m68k-elf/rtems ICE at instantiate_virtual_...

re PR target/8343 ([m68k] [3.2 regression] m68k-elf/rtems ICE at instantiate_virtual_regs_1)

	* i386.md (*mul*): FIx constraints; remove confused comment; fix
	athlon_decode attributes
	(imul/k8 optimization peep2s): New.

	* athlon.md (athlon_ssecmp*): Handle ssecomi as well.
	* i386.md (type attribute): Add ssecomi.
	(unit, memory, prefix attributes): Handle ssecomi.
	(cvt?2? patterns): Fix athlon_decode attribute
	(comi patterns): Set attribute to ssecomi.

	PR target/8343
	* m68k.md (umulsidi, mulsidi expanders): Use register operand.

From-SVN: r61098