tree-pass.h (pass_ipa_cdtor_merge): New function.

	* tree-pass.h (pass_ipa_cdtor_merge): New function.
	* cgraphunit.c (static_ctors, static_dtors): Move to ipa.c; make
	heap allocated.
	(record_cdtor_fn): Move to ipa.c; do not test for
	have_ctors_dtors.
	(build_cdtor): Move to ipa.c; add code avoiding construction
	when target have ctors/dtors and there is only one ctor/dtor at given
	priority.
	(compare_ctor, compare_dtor): Move to ipa.c; use DECL_UID to stabilize sort;
	reverse order of constructors.
	(cgraph_build_cdtor_fns):Move to ipa.c; rename to build_cdtor_fns.
	(cgraph_finalize_function): Do not call record_cdtor_fn.
	(cgraph_finalize_compilation_unit): Do not call cgraph_build_cdtor_fns.
	(cgraph_build_static_cdtor): Move to ipa.c.
	* ipa.c: Include target.h and tree-iterator.h.
	(cgraph_build_static_cdtor, static_ctors, static_dtors,
	record_cdtor_fn, build_cdtor, compare_ctor, compare_dtor,
	build_cdtor_fns, ipa_cdtor_merge, gate_ipa_cdtor_merge,
	pass_ipa_cdtor_merge): New.
	* passes.c (init_optimization_passes): Enqueue pass_ipa_cdtor_merge.
	* ipa-prop.c (update_indirect_edges_after_inlining): Avoid out of bounds access.

From-SVN: r163443