Fix openacc float reduction testcases

2017-10-04  Tom de Vries  <tom@codesourcery.com>

	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
	(main): Reduce sum of arr elements.  Assert that hres is exactly
	representable in 32-bit floating point.
	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
	(main): Reduce sum of arr elements.  Assert that hres and hmres are
	exactly representable in 32-bit floating point.
	* testsuite/libgomp.oacc-c-c++-common/reduction-7.c (gwv_np_4): Same.

From-SVN: r253398

libgomp/ChangeLog

+2017-10-04  Tom de Vries  <tom@codesourcery.com>
+
+	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
+	(main): Reduce sum of arr elements.  Assert that hres is exactly
+	representable in 32-bit floating point.
+	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
+	(main): Reduce sum of arr elements.  Assert that hres and hmres are
+	exactly representable in 32-bit floating point.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-7.c (gwv_np_4): Same.
+
 2017-09-28  Tom de Vries  <tom@codesourcery.com>
 
 	* testsuite/libgomp.c++/for-12.C: Remove superfluous -fopenmp option

libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c

@@ -11,7 +11,7 @@ main (int argc, char *argv[])
   float res = 0, hres = 0;
 
   for (i = 0; i < 32768; i++)
-    arr[i] = i;
+    arr[i] = i % (32768 / 64);
 
   #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
     reduction(+:res) copy(res)
@@ -36,6 +36,7 @@ main (int argc, char *argv[])
 	hres += arr[j * 1024 + (1023 - i)];
       }
 
+  assert (hres <= 16777216);
   assert (res == hres);
 
   return 0;

libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c

@@ -11,7 +11,7 @@ main (int argc, char *argv[])
   float res = 0, mres = 0, hres = 0, hmres = 0;
 
   for (i = 0; i < 32768; i++)
-    arr[i] = i;
+    arr[i] = i % (32768 / 64);
 
   #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
     reduction(+:res) reduction(max:mres) copy(res, mres)
@@ -48,7 +48,10 @@ main (int argc, char *argv[])
 	  hmres = arr[j * 1024 + (1023 - i)];
       }
 
+  assert (hres <= 16777216);
   assert (res == hres);
+
+  assert (hmres <= 16777216);
   assert (mres == hmres);
 
   return 0;

libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-7.c

@@ -183,7 +183,7 @@ void gwv_np_4()
   float res = 0, mres = 0, hres = 0, hmres = 0;
 
   for (i = 0; i < 32768; i++)
-    arr[i] = i;
+    arr[i] = i % (32768 / 64);
 
   #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32)
   {
@@ -219,7 +219,10 @@ void gwv_np_4()
 	  hmres = arr[j * 1024 + (1023 - i)];
       }
 
+  assert (hres <= 16777216);
   assert (res == hres);
+
+  assert (hmres <= 16777216);
   assert (mres == hmres);
 }