[Bug debug/60060] New: [4.9 Rgression] lto1: internal compiler error: in add_AT_specification, at dwarf2out.c:4096

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60060

            Bug ID: 60060
           Summary: [4.9 Rgression] lto1: internal compiler error: in
                    add_AT_specification, at dwarf2out.c:4096
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: aldyh at gcc dot gnu.org, burnus at gcc dot gnu.org,
                    rguenth at gcc dot gnu.org

At r207473 compiling gfortran.dg/namelist_51.f90 with '-g -flto' gives the
following ICE

lto1: internal compiler error: in add_AT_specification, at dwarf2out.c:4096

Compiling the tests with '-g' or '-g -flto -O3' gives on x86_64-apple-darwin13
the warning

warning: invalid DWARF generated by the compiler: DIE 0x000001f0 has multiple 
AT_calling_convention attributes in
'/var/folders/8q/sh_swgz96r7f5vnn08f7fxr00000gn/T//ccLHCwpM.ltrans0.ltrans.o'.

Note that before r207471 (and after r205679) the ICE was

/opt/gcc/work/gcc/testsuite/gfortran.dg/namelist_51.f90: In function
'readnamelist.1900':
/opt/gcc/work/gcc/testsuite/gfortran.dg/namelist_51.f90:8:0: internal compiler
error: in lto_output_tree, at lto-streamer-out.c:1390
     call readNamelist()