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* lto-symtab.c (lto_cgraph_replace_node): Assert that inline clones has no address taken. * cgraph.c (cgraph_mark_needed_node): Assert that inline clones are never needed. (cgraph_clone_node): Clear externally_visible flag for clones. * cgraph.h (cgraph_only_called_directly_p, cgraph_can_remove_if_no_direct_calls_p): New predicates. * tree-pass.h (pass_ipa_whole_program_visibility): Declare. * ipa-cp.c (ipcp_cloning_candidate_p): Use new predicate. (ipcp_initialize_node_lattices, ipcp_estimate_growth, ipcp_insert_stage): Likwise. * cgraphunit.c (cgraph_decide_is_function_needed): Do not compute externally_visible flag. (verify_cgraph_node): Verify that inline clones look right. (process_function_and_variable_attributes): Do not set externally_visible flags. (ipa_passes): Avoid executing small_ipa_passes at LTO stage; they've been already run. * lto-cgraph.c (lto_output_node): Assert that inline clones are not boundaries. * ipa-inline.c (cgraph_clone_inlined_nodes): Use new predicates; clear externally_visible when turning into inline clones (cgraph_mark_inline_edge): Use new predicates. (cgraph_estimate_growth): Likewise. (cgraph_decide_inlining): Likewise. * ipa.c (cgraph_postorder): Likewise. (cgraph_remove_unreachable_nodes): Likewise; sanity check that inline clones are not needed. (cgraph_externally_visible_p): New predicate. (function_and_variable_visibility): Add whole_program parameter; always set externally_visible flag; handle COMDAT function privatization. (local_function_and_variable_visibility): New function. (gate_whole_program_function_and_variable_visibility): New function. (whole_program_function_and_variable_visibility): New function. (pass_ipa_whole_program_visibility): New function. * passes.c (init_optimization_passes): Add whole program visibility pass. (do_per_function_toporder, function_called_by_processed_nodes_p): Do not care about needed/reachable flags. * varpool.c: Include flags.h (decide_is_variable_needed): When doing LTO assume whole-program mode. (varpool_finalize_decl): When we are in LTO read-back, all variables are analyzed. (varpool_analyze_pending_decls): Skip analyzis of analyzed vars. * lto/lto.c (read_cgraph_and_symbols): Mark functions neccesary only at ltrans stage; explain why this is needed and should not. From-SVN: r152520
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