https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93888
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:d2a810ee83e2952bf351498cecf8f5db28860a24 commit r9-8386-gd2a810ee83e2952bf351498cecf8f5db28860a24 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Mar 4 12:59:04 2020 +0100 inliner: Copy DECL_BY_REFERENCE in copy_decl_to_var [PR93888] In the following testcase we emit wrong debug info for the karg parameter in the DW_TAG_inlined_subroutine into main. The problem is that the karg PARM_DECL is DECL_BY_REFERENCE and thus in the IL has const K & type, but in the source just const K. When the function is inlined, we create a VAR_DECL for it, but don't set DECL_BY_REFERENCE, so when emitting DW_AT_location, we treat it like a const K & typed variable, but it has DW_AT_abstract_origin which has just the const K type and thus the debugger thinks the variable has const K type. Fixed by copying the DECL_BY_REFERENCE flag. Not doing it in copy_decl_for_dup_finish, because copy_decl_no_change already copies that flag through copy_node and in copy_result_decl_to_var it is undesirable, as we handle DECL_BY_REFERENCE in that case instead by changing the type. 2020-03-04 Jakub Jelinek <ja...@redhat.com> PR debug/93888 * tree-inline.c (copy_decl_to_var): Copy DECL_BY_REFERENCE flag. * g++.dg/guality/pr93888.C: New test.
