* tree-ssa-loop-niter.c (implies_nonnegative_p): New function.

[pf3gnuchains/gcc-fork.git] / gcc / ChangeLog

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+2006-06-15  Zdenek Dvorak <dvorakz@suse.cz>
+
+       * tree-ssa-loop-niter.c (implies_nonnegative_p): New function.
+       (derive_constant_upper_bound): Derive more precise upper bound in
+       common cases.  Return type changed to double_int.
+       (record_estimate): Reflect the changed return type of
+       derive_constant_upper_bound.
+       * double-int.c (double_int_zext, double_int_sext): Fix.
+
 2006-06-15  Paolo Bonzini  <bonzini@gnu.org>
 
        * configure.ac (CFLAGS): Get them from the toplevel or from the