[Bug rtl-optimization/48144] New: ICE: in code_motion_path_driver, at sel-sched.c:6575 with -fselective-scheduling2 and custom flags

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48144

           Summary: ICE: in code_motion_path_driver, at sel-sched.c:6575
                    with -fselective-scheduling2 and custom flags
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 23676
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23676
auto-reduced testcase (from gfortran.dg/intrinsic_ifunction_1.f90)

I am sorry for the insane flags needed to reproduce, but I hope this uncovers
some possibly hidden problem.

Compiler output:
$ gfortran -O -fira-region=one -fno-dce -fno-guess-branch-probability
-fno-ivopts -frerun-cse-after-loop -fschedule-insns2 -fsel-sched-pipelining
-fsel-sched-pipelining-outer-loops -fselective-scheduling2 -fno-tree-copyrename
-funroll-loops --param=max-cse-insns=50 --param=max-pipeline-region-blocks=30
testcase.f90 
testcase.f90: In function 'gf0026':
testcase.f90:6:0: internal compiler error: in code_motion_path_driver, at
sel-sched.c:6575
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