https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120125
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Nathaniel Shead <nsh...@gcc.gnu.org>: https://gcc.gnu.org/g:d787bc4fd372298e9ed5b11cb3050fd3707070f6 commit r16-613-gd787bc4fd372298e9ed5b11cb3050fd3707070f6 Author: Nathaniel Shead <nathanielosh...@gmail.com> Date: Thu May 8 23:06:13 2025 +1000 c++/modules: Fix handling of -fdeclone-ctor-dtor with explicit instantiations [PR120125] The attached testcase ICEs in maybe_thunk_body because we haven't created a node in the cgraph for an imported explicit instantiation yet. We in fact really shouldn't be emitting calls at all, since an imported explicit instantiation always exists in the TU we imported it from. So this patch adjusts DECL_NOT_REALLY_EXTERN handling to account for this. PR c++/120125 gcc/cp/ChangeLog: * module.cc (trees_out::write_function_def): Only set DECL_NOT_REALLY_EXTERN if the importer might need to emit it. * optimize.cc (maybe_thunk_body): Don't assume 'fn' has a cgraph node created. gcc/testsuite/ChangeLog: * g++.dg/modules/clone-4_a.C: New test. * g++.dg/modules/clone-4_b.C: New test. Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com> Reviewed-by: Jason Merrill <ja...@redhat.com>
