Fix s390 testcase vcond-shift

This patch fixes the vcond shift testcase that failed since setting
PARAM_MIN_VECT_LOOP_BOUND in the s390 backend.

gcc/testsuite/ChangeLog:

2017-04-03  Robin Dapp  <rdapp@linux.vnet.ibm.com>

	* gcc.target/s390/vector/vcond-shift.c (foo, foo2, foo3, baz, baf)
	(bal): Increase iteration count and assume alignment.

From-SVN: r246644

gcc/testsuite/ChangeLog

+2017-04-03  Robin Dapp  <rdapp@linux.vnet.ibm.com>
+
+	* gcc.target/s390/vector/vcond-shift.c (foo, foo2, foo3, baz, baf)
+	(bal): Increase iteration count and assume alignment.
+
 2017-04-03  Bin Cheng  <bin.cheng@arm.com>
 
 	* gcc.dg/tree-ssa/pr71347.c: Add predcom and drop XFAILs.

gcc/testsuite/gcc.target/s390/vector/vcond-shift.c

@@ -11,51 +11,63 @@
 /* { dg-final { scan-assembler "vesrlh\t%v.?,%v.?,15" } } */
 /* { dg-final { scan-assembler "vesrlb\t%v.?,%v.?,7" } } */
 
-#define SZ 4
-#define SZ2 8
-#define SZ3 16
+#define SZ 8
+#define SZ2 16
+#define SZ3 32
 
 void foo(int *w)
 {
   int i;
-  /* Should expand to (w + (w < 0 ? 1 : 0)) >> 1
-     which in turn should get simplified to (w + (w >> 31)) >> 1.  */
+  int *ww = __builtin_assume_aligned (w, 8);
+
+  /* Should expand to (ww + (ww < 0 ? 1 : 0)) >> 1
+     which in turn should get simplified to (ww + (ww >> 31)) >> 1.  */
   for (i = 0; i < SZ; i++)
-    w[i] = w[i] / 2;
+    ww[i] = ww[i] / 2;
 }
 
 void foo2(short *w)
 {
   int i;
+  short *ww = __builtin_assume_aligned (w, 8);
+
   for (i = 0; i < SZ2; i++)
-    w[i] = w[i] / 2;
+    ww[i] = ww[i] / 2;
 }
 
 
 void foo3(signed char *w)
 {
   int i;
+  signed char *ww = __builtin_assume_aligned (w, 8);
+
   for (i = 0; i < SZ3; i++)
-    w[i] = w[i] / 2;
+    ww[i] = ww[i] / 2;
 }
 
 int baz(int *x)
 {
   int i;
+  int *xx = __builtin_assume_aligned (x, 8);
+
   for (i = 0; i < SZ; i++)
-    x[i] = x[i] < 0 ? -1 : 0;
+    xx[i] = xx[i] < 0 ? -1 : 0;
 }
 
 int baf(short *x)
 {
   int i;
+  short *xx = __builtin_assume_aligned (x, 8);
+
   for (i = 0; i < SZ2; i++)
-    x[i] = x[i] >= 0 ? 0 : 1;
+    xx[i] = xx[i] >= 0 ? 0 : 1;
 }
 
 int bal(signed char *x)
 {
   int i;
+  signed char *xx = __builtin_assume_aligned (x, 8);
+
   for (i = 0; i < SZ3; i++)
-    x[i] = x[i] >= 0 ? 0 : -1;
+    xx[i] = xx[i] >= 0 ? 0 : -1;
 }