[Bug target/52918] [4.8 Regression] ICE: Invalid bb->loop_father (NULL) in add_bb_to_loop

[bscottm at ieee dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52918

--- Comment #5 from B. Scott Michel <bscottm at ieee dot org> 2012-04-10 21:31:13 UTC ---
I deduced that add_bb_to_loop and a null bb->loop_father meant that the
enclosing basic block was either missing or incorrectly annotated. The fix,
however, is not obvious without getting heavily involved in gcc development.

Preprocessed source uploaded for additional insight.