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PR c++/42317 * cgraph.h (struct cgraph_node): Add same_comdat_group field. * cgraph.c (cgraph_remove_node): Unchain node from same_comdat_group circular list. (cgraph_node_can_be_local_p): Return false for DECL_COMDAT with node->same_comdat_group. * ipa.c (cgraph_remove_unreachable_nodes): For any reachable node mark all its same_comdat_group nodes as also reachable. (cgraph_externally_visible_p): Return true even if any of same_comdat_group nodes has address taken. * lto-cgraph.c (lto_output_node): Stream out same_comdat_group. (output_cgraph): Ensure other same_comdat_group nodes are also included. (input_node): Stream in same_comdat_group. (input_cgraph_1): Fix up same_comdat_group fields from references to pointers. * cgraphunit.c (cgraph_analyze_functions): Mark all other same_comdat_group nodes as reachable. (cgraph_mark_functions_to_output): For each node->process process also other same_comdat_group nodes. * ipa-inline.c (cgraph_clone_inlined_nodes): Don't reuse nodes with same_comdat_group non-NULL. (cgraph_mark_inline_edge): Likewise. * decl2.c (cp_write_global_declarations): Clear DECL_EXTERNAL also on all other functions in the same comdat group. * optimize.c (maybe_clone_body): Also optimize virtual implicit dtors. For virtual comdat dtors tell cgraph that base and deleting dtor are in the same comdat group. * config/abi/pre/gnu.ver: Don't export certain base dtors that weren't previously exported. * g++.dg/opt/dtor2.C: New test. * g++.dg/opt/dtor2.h: New file. * g++.dg/opt/dtor2-aux.cc: New file. From-SVN: r155143 |
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