re PR rtl-optimization/80357 (ICE in model_update_limit_points_in_group, at haifa-sched.c:1982 on powerpc64le-linux-gnu)

gcc/
	PR rtl-optimization/80357
	* haifa-sched.c (tmp_bitmap): New variable.
	(model_recompute): Handle duplicate use records.
	(alloc_global_sched_pressure_data): Initialize tmp_bitmap.
	(free_global_sched_pressure_data): Free it.

gcc/testsuite/
	PR rtl-optimization/80357
	* gcc.c-torture/compile/pr80357.c: New test.

From-SVN: r246980