[Bug rtl-optimization/42388] New: ICE in move_bb_info with sel-sched and modulo-sched for 176.gcc

["janis at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

GCC trunk gets a ICE when building SPEC CPU2000 test 176.gcc with "-O2
-fmodulo-sched -fselective-scheduling" as demonstrated by a minimized testcase
that I'll attach to this PR.

elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gcc -O2 -fmodulo-sched
-fselective-scheduling -c bug.c
bug.c: In function ?unroll_loop?:
bug.c:63:1: internal compiler error: in move_bb_info, at sel-sched-ir.c:4968
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The ICE begins with this patch:

    http://gcc.gnu.org/viewcvs?view=rev&rev=153491

    r153491 | rguenth | 2009-10-23 09:34:46 +0000 (Fri, 23 Oct 2009)


-- 
           Summary: ICE in move_bb_info with sel-sched and modulo-sched for
                    176.gcc
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42388