https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108772
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Martin Liška from comment #2) > (In reply to Jakub Jelinek from comment #1) > > Does firefox really use -fimplicit-constexpr and -g1? > > Yes. Note the former option is used since gcc12: > https://bugzilla.mozilla.org/show_bug.cgi?id=1754752 Note 'decl' is <namespace_decl 0x7ffff60d1260 std> for me. For dwarf2 we return comp_unit_die () for this, but for -g1 we run into case NAMESPACE_DECL: case IMPORTED_DECL: if (debug_info_level <= DINFO_LEVEL_TERSE) return; so maybe for force_decl_die we want to do the same or alternatively for get_context_die () allow force_decl_die to "fail" and force one for the next up context up to comp_unit_die ()? OTOH, we run into this for a limbo entry that in the end likely will not get any DIE at -g1 anyway, so "forcing" a context via get_context_die is possibly excessive as well. So I think the actual bug is that we created a DIE for __tag when -g1 doesn't want a DIE for its ultimate context. Alternative make force_decl_die honor the dwarf2out_decl reality like with diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc index 1f39df3b1e2..bd2c9444ff3 100644 --- a/gcc/dwarf2out.cc +++ b/gcc/dwarf2out.cc @@ -26742,7 +26742,8 @@ force_decl_die (tree decl) break; case NAMESPACE_DECL: - if (dwarf_version >= 3 || !dwarf_strict) + if (debug_info_level > DINFO_LEVEL_TERSE + && (dwarf_version >= 3 || !dwarf_strict)) dwarf2out_decl (decl); else /* DWARF2 has neither DW_TAG_module, nor DW_TAG_namespace. */ in which case we'll put the function decl context in the CU DIE rather than in a namespace DIE?
