[Bug target/82005] [8 regression] early lto debug creates invalid assembly on Darwin

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82005

--- Comment #29 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> How do the remaining failures look like?

Part of them are darwin specific and several have already been reported (see
https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=NEW&bug_status=WAITING&bug_status=ASSIGNED&bug_status=UNCONFIRMED&bug_status=REOPENED&email1=dominiq%40lps.ens.fr&emailassigned_to1=1&emailreporter1=1&emailtype1=exact&list_id=201803).

Another part is also seen on linux (see
https://gcc.gnu.org/ml/gcc-testresults/2018-02/msg01178.html).

Digging through ~500 failures is no fun and I'll wait for some fixes for the
above.

However I have restore my testing of the gfortran test suite with -g -flto and
I see the following new failures:

FAIL: gfortran.dg/namelist_14.f90   -g -flto  (internal compiler error)
FAIL: gfortran.dg/namelist_14.f90   -g -flto  (test for excess errors)
FAIL: gfortran.dg/namelist_69.f90   -g -flto  (internal compiler error)
FAIL: gfortran.dg/namelist_69.f90   -g -flto  (test for excess errors)
FAIL: gfortran.dg/namelist_70.f90   -g -flto  (internal compiler error)
FAIL: gfortran.dg/namelist_70.f90   -g -flto  (test for excess errors)

all of them of the kind

/opt/gcc/_clean/gcc/testsuite/gfortran.dg/namelist_14.f90: In function 'foo':
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/namelist_14.f90:96: internal compiler
error: in add_dwarf_attr, at dwarf2out.c:4353