[Bug rtl-optimization/56181] [4.8 Regression] ICE in verify_loop_structure, at cfgloop.c:1581 with -ftracer

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56181



--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-02-05 
12:22:28 UTC ---

Hopefully it'll be somewhat clearer with a picture:

http://people.redhat.com/mpolacek/src/pr56181.png

the BB 4 is the one that is first marked as residing in loop 2 (because it is

dominated by BB 5 and its loop_father is 1, while the loop we're processing is

loop 2).