* loop.c (current_loop_info): Renamed from loop_info_data
and changed to a pointer.
(loop_optimize): Allocate loop_info structure for each loop
and initialise to zero.
(scan_loop): Set current_loop_info.
* unroll.c (loop_iterations): Don't abort if REG_USERVAR_P set
on iteration_var.
From-SVN: r31501
