[Bug tree-optimization/54824] [4.8 Regression] ICE in verify_loop_structure

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54824

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

           What    |Removed                     |Added
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                 CC|                            |matz at gcc dot gnu.org

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-24 12:56:35 UTC ---
It is RTL expansion that ends up connecting BB9, a common exit block of
the two unswitched loops randomly to BB10, the loop latch, forming a new loop.

And it is find_many_sub_basic_blocks that does this.  Eh ... bad luck.