rtlanal.c: Include flags.h

rtlanal.c: Include flags.h

	* rtlanal.c: Include flags.h
	(may_trap_p): Do not mark FP operations if trapping
	if !flag_trapping_math
	* Makefile.in (rtlanal.o): Add dependency on flag.h
	* ifcvt.c (noce_operand_ok): Avoid the lameness.

From-SVN: r51508