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Subject: [Bug rtl-optimization/55833] [4.6/4.8 Regression] ICE in verify_loop_structure, at cfgloop.c:1582 (BB should be marked irreducible !)
Date: Wed, 02 Jan 2013 11:33:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55833

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |rtl-optimization
      Known to work|                            |4.1.2, 4.7.2
   Target Milestone|---                         |4.6.4
            Summary|ICE in                      |[4.6/4.8 Regression] ICE in
                   |verify_loop_structure, at   |verify_loop_structure, at
                   |cfgloop.c:1582 (BB should   |cfgloop.c:1582 (BB should
                   |be marked irreducible !)    |be marked irreducible !)
      Known to fail|                            |4.3.6

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-02 11:33:28 UTC ---
Also fails with 4.3.6, works with 4.1.2 though.  Thus, technically a
regression.
Seems to work with 4.7 as well.

RTL unswitching.