* emit-rtl.c (dconstpi): Delete.
	(dconstsqrt2): New.
	(init_emit_once): Delete dconstpi and init dconstsqrt2.
	* real.h (dconstpi): Delete.
	(dconstsqrt2): New.
	* builtins.c (fold_builtin_cabs): Use dconstsqrt2.
	(fold_builtin_hypot): Likewise.

From-SVN: r121550