re PR middle-end/28071 (A file that can not be compiled in reasonable time/space)

re PR middle-end/28071 (A file that can not be compiled in reasonable time/space)

	PR rtl-optimization/28071
	* tree-optimize.c (tree_rest_of_compilation): Do not remove edges
	twice.
	* tree-inline.c (copy_bb): Use cgraph_set_call_stmt.
	* ipa-inline.c (cgraph_check_inline_limits): Add one_only argument.
	(cgraph_decide_inlining, cgraph_decide_inlining_of_small_function,
	cgraph_decide_inlining_incrementally): Update use of
	cgraph_check_inline_limits.
	* cgraph.c (edge_hash, edge_eq): New function.
	(cgraph_edge, cgraph_set_call_stmt, cgraph_create_edge,
	cgraph_edge_remove_caller, cgraph_node_remove_callees,
	cgraph_remove_node): Maintain call site hash.
	* cgraph.h (struct cgraph_node): Add call_site_hash.
	(cgraph_set_call_stmt): New function.

From-SVN: r116284