rtlanal.c (refers_to_regno_p): Change return value from int to bool.

rtlanal.c (refers_to_regno_p): Change return value from int to bool.

gcc/
	* rtlanal.c (refers_to_regno_p): Change return value from int to bool.
	* rtl.h (refers_to_regno_p): Add overload.
	* cse.c: Use it.
	* bt-load.c: Likewise.
	* combine.c: Likewise.
	* df-scan.c: Likewise.
	* sched-deps.c: Likewise.
	* config/s390/s390.c: Likewise.
	* config/m32r/m32r.c: Likewise.
	* config/rs6000/spe.md: Likewise.
	* config/rs6000/rs6000.c: Likewise.
	* config/pa/pa.c: Likewise.
	* config/stormy16/stormy16.c: Likewise.
	* config/cris/cris.c: Likewise.
	* config/arc/arc.md: Likewise.
	* config/arc/arc.c: Likewise.
	* config/sh/sh.md: Likewise.
	* config/sh/sh.c: Likewise.
	* config/frv/frv.c: Likewise.

From-SVN: r219203