re PR tree-optimization/80072 (ICE in gimple_build_assign_1 with -O3 -march=broadwell/skylake-avx512)

	PR tree-optimization/80072
	* tree-ssa-reassoc.c (struct operand_entry): Change id field type
	to unsigned int.
	(next_operand_entry_id): Change type to unsigned int.
	(sort_by_operand_rank): Make sure to return the right return value
	even if unsigned fields are bigger than INT_MAX.
	(struct oecount): Change cnt and id type to unsigned int.
	(oecount_hasher::equal): Formatting fix.
	(oecount_cmp): Make sure to return the right return value
	even if unsigned fields are bigger than INT_MAX.
	(undistribute_ops_list): Change next_oecount_id type to unsigned int.

From-SVN: r246408