[Bug tree-optimization/46675] [4.6 Regression] profiledbootstrap failed

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46675

--- Comment #19 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-28 17:20:23 
UTC ---
Good original dump:

  int npairs;
  int i;

    int npairs;
    int i;
  npairs = (int) ((unsigned int) n + 2147483648);

Bad dump:

  int npairs;
  int i;

    int npairs;
    int i;
  npairs = n - -2147483648;

We seem to fail to handle overflow for - -2147483648 at very start.