[Bug tree-optimization/70288] ICE with -O1 -fno-tree-dominator-opts

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70288

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-03-18
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed the ICE:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000f65a66 in break_up_subtract_bb (bb=0x7ffff4a171a0)
    at /space/rguenther/src/svn/gcc-5-branch/gcc/tree-ssa-reassoc.c:4345
4345      for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))

which is break_up_subtract_bb recursing too deep with its recursive DOM walk.