[Bug tree-optimization/45972] [4.6 Regression] tree check fail in use_pred_not_overlap_with_undef_path_pred

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45972

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2010-10-11 
21:49:56 UTC ---
Confirmed on x86_64-apple-darwin10, it works with 4.4.4, 4.5.0 and 4.6 revision
158105, and fails with revision 159105. Hence this is a regression.