https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104539
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:2c9b7077b72529fbbe896212a0088bff6025c5e7 commit r12-7288-g2c9b7077b72529fbbe896212a0088bff6025c5e7 Author: Jason Merrill <ja...@redhat.com> Date: Thu Feb 17 00:04:21 2022 -0500 c++: inlining explicit instantiations [PR104539] The PR10968 fix cleared DECL_COMDAT to force output of explicit instantiations. Then the PR59469 fix added a call to mark_needed, after which we no longer need to clear DECL_COMDAT, and leaving it set allows us to inline explicit instantiations without worrying about symbol interposition. I suppose there's an argument to be made that an explicit instantiation declaration (extern template) should clear DECL_COMDAT, since that suggests that there will be only a single instantiation somewhere that could be subject to interposition, but that doesn't change the 'inline' semantics, and it seems cleaner to treat template instantiations uniformly. PR c++/104539 gcc/cp/ChangeLog: * pt.cc (mark_decl_instantiated): Don't clear DECL_COMDAT. gcc/testsuite/ChangeLog: * g++.dg/ipa/inline-4.C: New test.
