predcom-1.c (count_averages): Avoid overflow during addition if an int is only 16 bits wide.

	* gcc.dg/tree-ssa/predcom-1.c (count_averages): Avoid overflow
	  during addition if an int is only 16 bits wide.
	* gcc.dg/tree-ssa/predcom-2.c (fib): Avoid overflow of 16-bit int.

From-SVN: r126908

gcc/testsuite/ChangeLog

 2007-07-25  Rask Ingemann Lambertsen  <rask@sygehus.dk>
 
+	* gcc.dg/tree-ssa/predcom-1.c (count_averages): Avoid overflow
+	  during addition if an int is only 16 bits wide.
+	* gcc.dg/tree-ssa/predcom-2.c (fib): Avoid overflow of 16-bit int.
+
+2007-07-25  Rask Ingemann Lambertsen  <rask@sygehus.dk>
+
 	* gcc.dg/torture/pr29584.c: Only run test if pointers have the same
 	  size as "long int" and are 32 or 64 bits wide.
 	* gcc.dg/torture/pr28814.c: Likewise.

gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c

@@ -23,7 +23,7 @@ void count_averages(int n)
   int i;
 
   for (i = 1; i < n; i++)
-    avg[i] = ((fib[i - 1] + fib[i] + fib[i + 1]) / 3) & 0xffff;
+    avg[i] = (((unsigned long) fib[i - 1] + fib[i] + fib[i + 1]) / 3) & 0xffff;
 }
 
 int main(void)

gcc/testsuite/gcc.dg/tree-ssa/predcom-2.c

@@ -4,7 +4,7 @@
 
 void abort (void);
 
-int fib[1000];
+long int fib[1000];
 
 void count_fib(void)
 {