[Bug rtl-optimization/49941] New: segmentation fault in redirect_jump_2

["amodra at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49941

           Summary: segmentation fault in redirect_jump_2
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: amodra@gmail.com


spawn /home/amodra/build/gcc-curr/gcc/xgcc -B/home/amodra/build/gcc-curr/gcc/
/home/amodra/src/gcc-current/gcc/testsuite/gcc.dg/fold-compare-3.c -O2
-fdump-tree-cfg -S -m32 -o fold-compare-3.s
/home/amodra/src/gcc-current/gcc/testsuite/gcc.dg/fold-compare-3.c: In function
'bla4eq':
/home/amodra/src/gcc-current/gcc/testsuite/gcc.dg/fold-compare-3.c:32:1:
internal compiler error: Segmentation fault

#0  redirect_jump_2 (jump=0xf70c5100, olabel=0x0, nlabel=0x0, delete_unused=0,
invert=1) at /home/amodra/src/gcc-current/gcc/jump.c:1515
#1  0x103f74a8 in invert_jump (jump=0xf70c5100, nlabel=0x0, delete_unused=0) at
/home/amodra/src/gcc-current/gcc/jump.c:1614
#2  0x101bd4b0 in set_edge_can_fallthru_flag () at
/home/amodra/src/gcc-current/gcc/cfganal.c:270
#3  0x10876968 in reorder_basic_blocks () at
/home/amodra/src/gcc-current/gcc/bb-reorder.c:1917
#4  0x10878828 in rest_of_handle_reorder_blocks () at
/home/amodra/src/gcc-current/gcc/bb-reorder.c:2320