* varray.h (varray_head_tag): Add elements_used.
	(VARRAY_PUSH): New macro.
	(VARRAY_POP): Likewise.
	(VARRAY_TOP): Likewise.
	Add variants of VARRAY_PUSH and VARRAY_POP for all varray element
	types.
	* varray.c (varray_init): Initialize elements_used.
	* Makefile.in (BASIC_BLOCK_H): Add varray.h.
	(INTEGRATE_H): New variable.
	(integrate.o): Depend on INTEGRATE_H.
	(unroll.o): Likewise.

From-SVN: r30777