[Bug rtl-optimization/55153] New: [4.8 Regression] ICE: in begin_move_insn, at sched-ebb.c:205 with -fsched2-use-superblocks and __builtin_prefetch

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55153

             Bug #: 55153
           Summary: [4.8 Regression] ICE: in begin_move_insn, at
                    sched-ebb.c:205 with -fsched2-use-superblocks and
                    __builtin_prefetch
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 28583
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28583
reduced testcase

Compiler output:
$ gcc -O -fsched2-use-superblocks -fschedule-insns2 testcase.c         
testcase.c: In function 'foo':
testcase.c:7:1: internal compiler error: in begin_move_insn, at sched-ebb.c:205
 }
 ^
0x110a092 begin_move_insn
        /mnt/svn/gcc-trunk/gcc/sched-ebb.c:205
0x10cc59c commit_schedule
        /mnt/svn/gcc-trunk/gcc/haifa-sched.c:5647
0x10cc59c schedule_block(basic_block_def**, void*)
        /mnt/svn/gcc-trunk/gcc/haifa-sched.c:6429
0x110a4f3 schedule_ebb(rtx_def*, rtx_def*, bool)
        /mnt/svn/gcc-trunk/gcc/sched-ebb.c:547
0x110b1f4 schedule_ebbs()
        /mnt/svn/gcc-trunk/gcc/sched-ebb.c:666
0x9b414c rest_of_handle_sched2
        /mnt/svn/gcc-trunk/gcc/sched-rgn.c:3565
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