https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63331
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 33532 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33532&action=edit gcc5-pr63331.patch Untested patch to fix (or work around) all but the last 2 FAILs. It seems there is no real need to have DECL_UID differences in this case, we can just use DEBUG_EXPR_DECLs instead of VAR_DECLs for the debughook. That said, the use of DECL_UID in lhd_set_decl_assembler_name is IMHO still problematic, but if DECL_UID appear only after the FE is done with the stuff, it should be less important issue.