function.c (prologue, [...]): Change their types to VEC(int,heap)*.

function.c (prologue, [...]): Change their types to VEC(int,heap)*.

	* function.c (prologue, epilogue, sibcall_epilogue): Change
	their types to VEC(int,heap)*.
	(free_after_compilation): Free the three vectors above.
	(init_function_for_compilation, record_insns, contains,
	prologue_epilogue_contains, sibcall_epilogue_contains,
	reposition_prologue_and_epilogue_notes): Use VEC instead of
	VARRAY.  (init_function_once): Remove.
	* function.h: Remove the prototype for init_function_once.
	* toplev.c (backend_init): Don't call init_function_once.

From-SVN: r100588