* vapool.c: Include tree-ssa-alias.h, gimple.h and lto-streamer.h
(varpool_get_constructor): New function.
(varpool_ctor_useable_for_folding_p): Break out from ...
(ctor_for_folding): ... here; use varpool_get_constructor.
(varpool_assemble_decl): Likewise.
* lto-streamer.h (struct output_block): Turn cgraph_node
to symbol filed.
(lto_input_variable_constructor): Declare.
* ipa-visibility.c (function_and_variable_visibility): Use
varpool_get_constructor.
* cgraph.h (varpool_get_constructor): Declare.
(varpool_ctor_useable_for_folding_p): New function.
* lto-streamer-out.c (get_symbol_initial_value): Take encoder
parameter; return error_mark_node for non-trivial constructors.
(lto_write_tree_1, DFS_write_tree): UPdate use of
get_symbol_initial_value.
(output_function): Update initialization of symbol.
(output_constructor): New function.
(copy_function): Rename to ..
(copy_function_or_variable): ... this one; handle vars too.
(lto_output): Output variable sections.
* lto-streamer-in.c (input_constructor): New function.
(lto_read_body): Rename from ...
(lto_read_body_or_constructor): ... this one; handle vars
too.
(lto_input_variable_constructor): New function.
* ipa-prop.c (ipa_prop_write_jump_functions,
ipa_prop_write_all_agg_replacement): Update.
* lto-cgraph.c (compute_ltrans_boundary): Use it.
(output_cgraph_opt_summary): Set symbol to NULL.
* lto-partition.c (add_references_to_partition): Use
varpool_ctor_useable_for_folding_p.
* lto.c (lto_read_in_decl_state): Update sanity check.
From-SVN: r212467
