[Bug rtl-optimization/55833] [4.6/4.8 Regression] ICE in verify_loop_structure, at cfgloop.c:1582 (BB should be marked irreducible !)

[rguenth at gcc dot gnu.org]

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.