stupid.c (stupid_mark_refs): Generate a REG_UNUSED note for a register which is clobbered even if...

	* stupid.c (stupid_mark_refs): Generate a REG_UNUSED note
	for a register which is clobbered even if the register
	was used by an earlier instruction.
	* i386.md (fix_truncsfdi2, fix_truncdfdi2,
	fix_truncxfdi2): Don't bother with the gen_reg_RTX.
	(fix_truncsfsi2, fix_truncsfdi2, fix_truncdfsi2,
	fix_truncdfdi2, fix_truncxfsi2, fix_truncxfdi2): Update
	operand constraints and modes.
	* i386.c (output_fix_trunc): Use HImode register to avoid
	memory stalls.  Call output_move_double instead of output_to_reg.
	(output_to_reg): Remove.
	* i386.h: Likewise.
	* i386.md (negsf2, negdf2, negxf2): Set the type
	attribute to fpop.

From-SVN: r26621