re PR tree-optimization/27882 (segfault in ipa-inline.c, if (e->callee->local.disregard_inline_limits)

	PR tree-optimization/27882
	* cgraph.c (cgraph_remove_node): Clear needed, reachable, next, previous
	and decl fields.
	* cgraphunit.c (cgraph_reset_node): Expect cgraph_remove_node to kill
	next pointer
	(cgraph_analyze_compilation_unit): Likewise.
	* ipa.c (cgraph_remove_unreachable_nodes): Likewise.
	* ipa-inline.c (cgraph_decide_recursive_inlining): Likewise.
	(cgraph_early_inlinine): Make order garbage collected.
	* Makefile.in (gt-ipa-inline): New garbagecollected file.

From-SVN: r115763