[Bug debug/84645] New: -flto -g0 at compile-time vs. -flto -g at link time ICEs in add_dwarf_attr, at dwarf2out.c:4353

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84645

            Bug ID: 84645
           Summary: -flto -g0 at compile-time vs. -flto -g at link time
                    ICEs in add_dwarf_attr, at dwarf2out.c:4353
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Keywords: lto
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
            Blocks: 82005
  Target Milestone: ---

When building gfortran.dg/namelist_69.f90 with -flto -g0 and linking it with
-flto -g we end up ICEing at link-time:

/space/rguenther/src/svn/early-lto-debug/gcc/testsuite/gfortran.dg/namelist_69.f90:
In function ‘test2’:
/space/rguenther/src/svn/early-lto-debug/gcc/testsuite/gfortran.dg/namelist_69.f90:232:
internal compiler error: in add_dwarf_attr, at dwarf2out.c:4353
0x98bc53 add_dwarf_attr
        /space/rguenther/src/svn/early-lto-debug/gcc/dwarf2out.c:4353
0x98c55a add_AT_die_ref
        /space/rguenther/src/svn/early-lto-debug/gcc/dwarf2out.c:4730
0x9b7ee0 add_type_attribute
        /space/rguenther/src/svn/early-lto-debug/gcc/dwarf2out.c:21383
0x9bda80 gen_variable_die
        /space/rguenther/src/svn/early-lto-debug/gcc/dwarf2out.c:23539
0x9c5a67 gen_decl_die
        /space/rguenther/src/svn/early-lto-debug/gcc/dwarf2out.c:26158
0x9c3fe0 process_scope_var
        /space/rguenther/src/svn/early-lto-debug/gcc/dwarf2out.c:25614

this sort-of blocks PR82005 which forces -g0 at compile-time (sth usually
isn't what people do).


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82005
[Bug 82005] [8 regression] early lto debug creates invalid assembly on Darwin