[Bug middle-end/57103] New: [4.8/4.9 Regression] ICE: verify_gimple failed: location references block not in block tree with -ftree-parallelize-loops=4

["zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57103

             Bug #: 57103
           Summary: [4.8/4.9 Regression] ICE: verify_gimple failed:
                    location references block not in block tree with
                    -ftree-parallelize-loops=4
    Classification: Unclassified
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 29964
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29964
reduced testcase

Compiler output:
$ gcc -O -ftree-parallelize-loops=4 testcase.c         
testcase.c: In function 'bar._loopfn.0':
testcase.c:7:3: error: location references block not in block tree
   for (; i < 1024; i++)
   ^
*d_4[i.5_25]
# VUSE <.MEM_33(D)>
_27 = *d_4[i.5_25];
testcase.c:7:3: internal compiler error: verify_gimple failed
0xa5e09c verify_gimple_in_cfg(function*)
        /mnt/svn/gcc-trunk/gcc/tree-cfg.c:4792
0x947c07 execute_function_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:1969
0x948567 execute_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:2002
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.

Tested revisions:
r198366 - crash
4.8 r198018 - crash
4.7 r198018 - OK