[Bug tree-optimization/59303] [4.9 Regression] uninit-pred-8_b.c and uninit-pred-9_b.c fail after better optimizations

[davidxl at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59303

--- Comment #8 from davidxl at google dot com ---
Created attachment 31495
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31495&action=edit
Patch file : cleanup + more predicate simplification rules