[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]

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: unassig...@gcc.gnu.org

        ReportedBy: zso...@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