https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94223
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
gimplify.c does:
4941 if (!DECL_NAME (object))
4942 DECL_NAME (object) = create_tmp_var_name ("C");
4943 walk_tree (&DECL_INITIAL (object), force_labels_r, NULL,
NULL);
4944
4945 /* ??? C++ doesn't automatically append a .<number> to the
4946 assembler name, and even when it does, it looks at FE
private
4947 data structures to figure out what that number should
be,
4948 which are not set for this variable. I suppose this is
4949 important for local statics for inline functions, which
aren't
4950 "local" in the object file sense. So in order to get a
unique
4951 TU-local symbol, we must invoke the lhd version now. */
4952 lhd_set_decl_assembler_name (object);
and lhd_set_decl_assembler_name does:
169 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
170 char *label;
171
172 ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
173 id = get_identifier (label);
The problem is that DECL_UID isn't stable across -fcompare-debug, we only
guarantee that the comparisons of the DECL_UIDs are the same between
corresponding decls, but -g can have larger gaps.
grep ASM_FORMAT_PRIVATE_NAME.*DECL_UID * */* config/*/* 2>/dev/null
langhooks.c: ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
d/decl.cc: ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
lto/lto-lang.c: ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
Not sure what to do, shall we have some GTY counter used for these instead of
DECL_UID which we'd bump when we've done this?
