[Bug tree-optimization/23929] [4.1 Regression] segfault in expand_simple_operations, tree-ssa-loop-niter.c:637

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

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-17 19:53 -------
Confirmed, a regression from 4.0.0.
backtrace:
#0  expand_simple_operations (expr=0x0) at /home/pinskia/src/onetest/gcc/gcc/tree-ssa-loop-
niter.c:637
#1  0x00000000004cee15 in expand_simple_operations (expr=0x2a95c2ee70) at /home/pinskia/src/
onetest/gcc/gcc/tree-ssa-loop-niter.c:648
#2  0x00000000004cee15 in expand_simple_operations (expr=0x2a95c37080) at /home/pinskia/src/
onetest/gcc/gcc/tree-ssa-loop-niter.c:648
#3  0x00000000004cee15 in expand_simple_operations (expr=0x2a95c37280) at /home/pinskia/src/
onetest/gcc/gcc/tree-ssa-loop-niter.c:648
#4  0x00000000004cee15 in expand_simple_operations (expr=0x2a95c2f870) at /home/pinskia/src/
onetest/gcc/gcc/tree-ssa-loop-niter.c:648
#5  0x00000000004cee15 in expand_simple_operations (expr=0x2a95c2f8c0) at /home/pinskia/src/
onetest/gcc/gcc/tree-ssa-loop-niter.c:648
#6  0x00000000004cf52c in tree_simplify_using_condition_1 (cond=0x2a95a664b0, 
expr=0x2a95c2f8c0) at /home/pinskia/src/onetest/gcc/gcc/tree-ssa-loop-niter.c:777
#7  0x00000000004cfa8e in simplify_using_initial_conditions (loop=Variable "loop" is not available.
) at /home/pinskia/src/onetest/gcc/gcc/tree-ssa-loop-niter.c:805
#8  0x00000000004cff1f in number_of_iterations_exit (loop=0xbcd540, exit=Variable "exit" is not 
available.
) at /home/pinskia/src/onetest/gcc/gcc/tree-ssa-loop-niter.c:990
#9  0x00000000007e6a2a in number_of_iterations_in_loop (loop=0xbcd540) at /home/pinskia/src/
onetest/gcc/gcc/tree-scalar-evolution.c:2284
#10 0x00000000007e7f76 in compute_overall_effect_of_inner_loop (loop=0xbcd540, 
evolution_fn=0x2a95c2f6e0) at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:471
#11 0x00000000007eb704 in follow_ssa_edge (loop=0xbcd450, def=0x2a95c28000, 
halting_phi=0x2a95c28100, evolution_of_loop=0x7fbffff2c0)
    at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1389
#12 0x00000000007ebf87 in follow_ssa_edge_in_rhs (loop=0xbcd450, at_stmt=0x2a95a66af0, 
rhs=0x2a95c27370, halting_phi=Variable "halting_phi" is not available.
) at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1110
#13 0x00000000007eb504 in follow_ssa_edge (loop=0xbcd450, def=0x2a95a66af0, 
halting_phi=0x2a95c28100, evolution_of_loop=0x7fbffff2c0)
    at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1442
#14 0x00000000007eb589 in follow_ssa_edge (loop=0xbcd450, def=0x2a95c24b00, 
halting_phi=0x2a95c28100, evolution_of_loop=0x7fbffff330)
    at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1293
#15 0x00000000007eb607 in follow_ssa_edge (loop=0xbcd450, def=0x2a95c24300, 
halting_phi=0x2a95c28100, evolution_of_loop=0x7fbffff390)
    at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1293
#16 0x00000000007e8770 in analyze_scalar_evolution_1 (loop=0xbcd450, var=0x2a95c25d20, 
res=0x0) at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1494
#17 0x00000000007e8ae7 in analyze_scalar_evolution (loop=0xbcd450, var=0x0) at /home/pinskia/
src/onetest/gcc/gcc/tree-scalar-evolution.c:1856
#18 0x00000000007ea405 in analyze_scalar_evolution_in_loop (wrto_loop=0xbcd450, 
use_loop=0xbcd450, version=Variable "version" is not available.
) at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:1880
#19 0x00000000007eace7 in simple_iv (loop=0xbcd450, stmt=0x2a95c28100, op=0x2a95c25d20, 
base=0x7fbffff468, step=0x7fbffff470, allow_nonconstant_step=1 '\001')
    at /home/pinskia/src/onetest/gcc/gcc/tree-scalar-evolution.c:2597
#20 0x00000000004f1b9e in find_induction_variables (data=0x7fbffff500) at /home/pinskia/src/
onetest/gcc/gcc/tree-ssa-loop-ivopts.c:889
#21 0x00000000004f5755 in tree_ssa_iv_optimize (loops=0xbda050) at /home/pinskia/src/onetest/
gcc/gcc/tree-ssa-loop-ivopts.c:5933


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
      Known to fail|                            |4.1.0
      Known to work|                            |4.0.0
   Last reconfirmed|0000-00-00 00:00:00         |2005-09-17 19:53:05
               date|                            |
            Summary|segfault in                 |[4.1 Regression] segfault in
                   |expand_simple_operations,   |expand_simple_operations,
                   |tree-ssa-loop-niter.c:637   |tree-ssa-loop-niter.c:637
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23929