[Bug tree-optimization/56490] [4.7/4.8/4.9 Regression] -Wall triggering infinite loop

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56490

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 32184
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32184&action=edit
gcc49-pr56490.patch

Untested fix (cleanups plus the limiting param).