[Bug middle-end/70937] New: [7.0 Regression] ICE: tree code âssa_nameâ is not supported in LTO streams

["Joost.VandeVondele at mat dot ethz.ch" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937

            Bug ID: 70937
           Summary: [7.0 Regression] ICE: tree code âssa_nameâ is not
                    supported in LTO streams
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Joost.VandeVondele at mat dot ethz.ch
  Target Milestone: ---

overnight regression in trunk:

> cat bug.f90 
  SUBROUTINE dbcsr_test_read_args(narg, args)
    CHARACTER(len=*), DIMENSION(:), &
      INTENT(out)         :: args
    CHARACTER(len=80)     :: line
    DO
       args(narg) = line
    ENDDO
  END SUBROUTINE dbcsr_test_read_args

> gfortran -flto -c -O0 bug.f90 
bug.f90:8:0: internal compiler error: tree code âssa_nameâ is not supported in
LTO streams
   END SUBROUTINE dbcsr_test_read_args

0xa62703 DFS::DFS(output_block*, tree_node*, bool, bool, bool)
        ../../gcc/gcc/lto-streamer-out.c:676
0xa6338b lto_output_tree(output_block*, tree_node*, bool, bool)
        ../../gcc/gcc/lto-streamer-out.c:1616
0xa5960d write_global_stream
        ../../gcc/gcc/lto-streamer-out.c:2415
0xa5960d lto_output_decl_state_streams(output_block*, lto_out_decl_state*)
        ../../gcc/gcc/lto-streamer-out.c:2462
0xa60fa4 produce_asm_for_decls()
        ../../gcc/gcc/lto-streamer-out.c:2839
0xacd65f write_lto
        ../../gcc/gcc/passes.c:2459
0xad08ae ipa_write_summaries_1
        ../../gcc/gcc/passes.c:2520
0xad08ae ipa_write_summaries()
        ../../gcc/gcc/passes.c:2580
0x7a6059 ipa_passes
        ../../gcc/gcc/cgraphunit.c:2310
0x7a6059 symbol_table::compile()
        ../../gcc/gcc/cgraphunit.c:2404
0x7a880d symbol_table::finalize_compilation_unit()
        ../../gcc/gcc/cgraphunit.c:2564
Please submit a full bug report,