[Bug c++/66381] New: ice in dfs_enumerate_from with -O3

["dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66381

            Bug ID: 66381
           Summary: ice in dfs_enumerate_from with -O3
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 35677
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35677&action=edit
C++ source code

For trunk gcc dated 20150530

Cue2Toc.cc: In function âcuesheet* read_cue(const char*, const char*)â:
Cue2Toc.cc:298:1: internal compiler error: in dfs_enumerate_from, at
cfganal.c:1195
0x8dc305 dfs_enumerate_from(basic_block_def*, int, bool (*)(basic_block_def
const*, void const*), basic_block_def**, int, void const*)
    ../../src/trunk/gcc/cfganal.c:1195
0xfabaa0 determine_bb_domination_status
    ../../src/trunk/gcc/tree-ssa-threadupdate.c:1768
0xfabaa0 thread_through_loop_header
    ../../src/trunk/gcc/tree-ssa-threadupdate.c:1953
0xfae22a thread_through_all_blocks(bool)
    ../../src/trunk/gcc/tree-ssa-threadupdate.c:2667
0xee203b execute
    ../../src/trunk/gcc/tree-ssa-dom.c:1244
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Flag -O3 required.