Fix 435.gromacs miscompile.

2010-08-12  Sebastian Pop  <sebastian.pop@amd.com>

	* graphite-clast-to-gimple.c (precision_for_value): Adjust
	computation of precision by 1.

From-SVN: r164779

gcc/ChangeLog

+2010-08-12  Sebastian Pop  <sebastian.pop@amd.com>
+
+	* graphite-clast-to-gimple.c (precision_for_value): Adjust
+	computation of precision by 1.
+
 2010-09-30  Riyadh Baghdadi <baghdadi.mr@gmail.com>
 
 	* graphite-cloog-util.c (openscop_read_cloog_matrix): New.

gcc/ChangeLog.graphite

+2010-08-12  Sebastian Pop  <sebastian.pop@amd.com>
+
+	* graphite-clast-to-gimple.c (precision_for_value): Adjust
+	computation of precision by 1.
+
 2010-08-12  Riyadh Baghdadi <baghdadi.mr@gmail.com>
 
 	* graphite-cloog-util.c (openscop_read_cloog_matrix): New.

gcc/graphite-clast-to-gimple.c

@@ -415,7 +415,7 @@ precision_for_value (mpz_t val)
   if (mpz_sgn (y) < 0)
     mpz_neg (y, y);
 
-  while (mpz_cmp (y, x) > 0)
+  while (mpz_cmp (y, x) >= 0)
     {
       mpz_mul (x, x, two);
       precision++;