PR f/9258
	* global.c (struct allocno): Add no_stack_reg.
	(global_conflicts): Set no_stack_reg.
	(find_reg): Use it.

	* convert.c (convert_to_real): Fold - and abs only when profitable.
	* fold-const.c (fold): Fold truncates in - and abs.

	* gcc.c-torture/compile/20030115-1.c: New test.

	* gcc.dg/i386-fpcvt-1.c: New test.
	* gcc.dg/i386-fpcvt-2.c: New test.

From-SVN: r61329