[Bug tree-optimization/50222] ICE with -O{1,2} -funswitch-loops -ftree-loop-distribution

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50222

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-08-29
                 CC|                            |spop at gcc dot gnu.org
          Component|c                           |tree-optimization
     Ever Confirmed|0                           |1
      Known to fail|                            |4.4.6, 4.5.3, 4.6.1, 4.7.0

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-29 
08:20:48 UTC ---
Confirmed, reducing.

Program received signal SIGSEGV, Segmentation fault.
0x0000000000c11969 in rename_use_op (op_p=0x7ffff5bc4230)
    at /space/rguenther/src/svn/gcc-4_6-branch/gcc/tree-vect-loop-manip.c:55
55        if (TREE_CODE (USE_FROM_PTR (op_p)) != SSA_NAME)
(gdb) p *op_p
$2 = {prev = 0x0, next = 0x0, loc = {stmt = 0x7ffff5bc4200, 
    ssa_name = 0x7ffff5bc4200}, use = 0x7ffff5bc4250}
(gdb) call debug_gimple_stmt (0x7ffff5bc4200)
key_frame_413 = PHI <(90)>

a broken PHI.

Broken since -ftree-loop-distribution is available.