Fix overwide shifts in PR/88903 testcase

gcc/testsuite/ChangeLog:

	PR/tree-optimization 88903
	* gcc.dg/vect/pr88903-1.c: Add explicit &.

From-SVN: r268144

gcc/testsuite/ChangeLog

+2019-01-22  Tamar Christina  <tamar.christina@arm.com>
+
+	PR/tree-optimization 88903
+	* gcc.dg/vect/pr88903-1.c: Add explicit &.
+
 2019-01-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/88904

gcc/testsuite/gcc.dg/vect/pr88903-1.c

@@ -7,8 +7,8 @@ foo()
 {
   for (int i = 0; i < 512; ++i)
     {
-      x[2*i] = x[2*i] << (i+1);
-      x[2*i+1] = x[2*i+1] << (i+1);
+      x[2*i] = x[2*i] << ((i+1) & 31);
+      x[2*i+1] = x[2*i+1] << ((i+1) & 31);
     }
 }
 
@@ -20,7 +20,7 @@ main()
     x[i] = i;
   foo ();
   for (int i = 0; i < 1024; ++i)
-    if (x[i] != i << (i/2+1))
+    if (x[i] != i << ((i/2+1) & 31))
       __builtin_abort ();
   return 0;
 }