gcc/

	PR lto/70289
	PR ipa/70348
	PR tree-optimization/70373
	PR middle-end/70533
	PR middle-end/70534
	PR middle-end/70535
	* gimplify.c (gimplify_adjust_omp_clauses): Add or adjust data
	clauses for acc parallel reductions as necessary.  Error on those
	that are private.
	* omp-low.c (scan_sharing_clauses): Don't install variables which
	are used in acc parallel reductions.
	(lower_rec_input_clauses): Remove dead code.
	(lower_oacc_reductions): Add support for reference reductions.
	(lower_reduction_clauses): Remove dead code.
	(lower_omp_target): Don't remap variables appearing in acc parallel
	reductions.
	* tree.h (OMP_CLAUSE_MAP_IN_REDUCTION): New macro.

	gcc/testsuite/
	* c-c++-common/goacc/reduction-5.c: New test.
	* c-c++-common/goacc/reduction-promotions.c: New test.
	* gfortran.dg/goacc/reduction-3.f95: New test.
	* gfortran.dg/goacc/reduction-promotions.f90: New test.

	libgomp/
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
	test.
	* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
	coverage.
	* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
	coverage.
	* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
	* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
	* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
	* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
	* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
	* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
	* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
	* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
	* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
	* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
	* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@234840 138bc75d-0d04-0410-961f-82ee72b054a4

40 files changed, 2621 insertions, 530 deletions

diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index a1763b68c9e..742f19052a4 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,65 @@
+2016-04-08  Cesar Philippidis  <cesar@codesourcery.com>
+
+	PR lto/70289
+	PR ipa/70348
+	PR tree-optimization/70373
+	PR middle-end/70533
+	PR middle-end/70534
+	PR middle-end/70535
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c: New
+	test.
+	* testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c: Add test
+	coverage.
+	* testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c: Likewise.
+	* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Likewise.
+	* testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/pr70289.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/pr70373.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-1.c: Add test
+	coverage.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-2.c: Likewise.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-3.c: Likewise.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-4.c: Likewise.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-5.c: Likewise.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-6.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/reduction.h: New test.
+	* testsuite/libgomp.oacc-fortran/parallel-reduction.f90: New test.
+	* testsuite/libgomp.oacc-fortran/pr70289.f90: New test.
+	* testsuite/libgomp.oacc-fortran/reduction-1.f90: Add test coverage.
+	* testsuite/libgomp.oacc-fortran/reduction-2.f90: Likewise.
+	* testsuite/libgomp.oacc-fortran/reduction-3.f90: Likewise.
+	* testsuite/libgomp.oacc-fortran/reduction-4.f90: Likewise.
+	* testsuite/libgomp.oacc-fortran/reduction-5.f90: Likewise.
+	* testsuite/libgomp.oacc-fortran/reduction-6.f90: Likewise.
+	* testsuite/libgomp.oacc-fortran/reduction-7.f90: New test.
+
 2016-03-30  Thomas Schwinge  <thomas@codesourcery.com>
 	    James Norris  <jnorris@codesourcery.com>
 	    Nathan Sidwell  <nathan@codesourcery.com>
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
new file mode 100644
index 00000000000..55ab3c96334
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gang-np-1.c
@@ -0,0 +1,45 @@
+/* { dg-additional-options "-w" } */
+
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs, non-private reduction
+   variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, arr[1024], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res)
+  {
+    #pragma acc loop gang reduction(+:res)
+    for (i = 0; i < 1024; i++)
+      res += arr[i];
+  }
+
+  for (i = 0; i < 1024; i++)
+    hres += arr[i];
+
+  assert (res == hres);
+
+  res = hres = 1;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res)
+  {
+    #pragma acc loop gang reduction(*:res)
+    for (i = 0; i < 12; i++)
+      res *= arr[i];
+  }
+
+  for (i = 0; i < 12; i++)
+    hres *= arr[i];
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
new file mode 100644
index 00000000000..d4341e9c2cf
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gv-np-1.c
@@ -0,0 +1,30 @@
+/* { dg-additional-options "-w" } */
+
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs and vectors, non-private
+   reduction variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, arr[1024], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res)
+  {
+    #pragma acc loop gang vector reduction(+:res)
+    for (i = 0; i < 1024; i++)
+      res += arr[i];
+  }
+
+  for (i = 0; i < 1024; i++)
+    hres += arr[i];
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
new file mode 100644
index 00000000000..2e5668b134e
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gw-np-1.c
@@ -0,0 +1,30 @@
+/* { dg-additional-options "-w" } */
+
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs and workers, non-private
+   reduction variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, arr[1024], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res)
+  {
+    #pragma acc loop gang worker reduction(+:res)
+    for (i = 0; i < 1024; i++)
+      res += arr[i];
+  }
+
+  for (i = 0; i < 1024; i++)
+    hres += arr[i];
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
new file mode 100644
index 00000000000..d6103738813
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-1.c
@@ -0,0 +1,28 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs, workers and vectors, non-private
+   reduction variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, arr[1024], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res)
+  {
+    #pragma acc loop gang worker vector reduction(+:res)
+    for (i = 0; i < 1024; i++)
+      res += arr[i];
+  }
+
+  for (i = 0; i < 1024; i++)
+    hres += arr[i];
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
new file mode 100644
index 00000000000..ea5c151af3c
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-2.c
@@ -0,0 +1,34 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs, workers and vectors, non-private
+   reduction variable: separate gang and worker/vector loops).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[32768], res = 0, hres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res)
+  {
+    #pragma acc loop gang reduction(+:res)
+    for (j = 0; j < 32; j++)
+      {
+        #pragma acc loop worker vector reduction(+:res)
+        for (i = 0; i < 1024; i++)
+	  res += arr[j * 1024 + i];
+      }
+    /* "res" is non-private, and is not available until after the parallel
+       region.  */
+  }
+
+  for (i = 0; i < 32768; i++)
+    hres += arr[i];
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
new file mode 100644
index 00000000000..0056f3ce10e
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-3.c
@@ -0,0 +1,33 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs, workers and vectors, non-private
+   reduction variable: separate gang and worker/vector loops).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j;
+  double arr[32768], res = 0, hres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copyin(arr) copy(res)
+  {
+    #pragma acc loop gang reduction(+:res)
+    for (j = 0; j < 32; j++)
+      {
+        #pragma acc loop worker vector reduction(+:res)
+        for (i = 0; i < 1024; i++)
+	  res += arr[j * 1024 + i];
+      }
+  }
+
+  for (i = 0; i < 32768; i++)
+    hres += arr[i];
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
new file mode 100644
index 00000000000..e69d0ec04c7
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-gwv-np-4.c
@@ -0,0 +1,55 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (gangs, workers and vectors, multiple
+   non-private reduction variables, float type).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j;
+  float arr[32768];
+  float res = 0, mres = 0, hres = 0, hmres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       copy(res, mres)
+  {
+    #pragma acc loop gang reduction(+:res) reduction(max:mres)
+    for (j = 0; j < 32; j++)
+      {
+	#pragma acc loop worker vector reduction(+:res) reduction(max:mres)
+	for (i = 0; i < 1024; i++)
+	  {
+	    res += arr[j * 1024 + i];
+	    if (arr[j * 1024 + i] > mres)
+	      mres = arr[j * 1024 + i];
+	  }
+
+	#pragma acc loop worker vector reduction(+:res) reduction(max:mres)
+	for (i = 0; i < 1024; i++)
+	  {
+	    res += arr[j * 1024 + (1023 - i)];
+	    if (arr[j * 1024 + (1023 - i)] > mres)
+	      mres = arr[j * 1024 + (1023 - i)];
+	  }
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 1024; i++)
+      {
+        hres += arr[j * 1024 + i];
+	hres += arr[j * 1024 + (1023 - i)];
+	if (arr[j * 1024 + i] > hmres)
+	  hmres = arr[j * 1024 + i];
+	if (arr[j * 1024 + (1023 - i)] > hmres)
+	  hmres = arr[j * 1024 + (1023 - i)];
+      }
+
+  assert (res == hres);
+  assert (mres == hmres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
new file mode 100644
index 00000000000..31e4366f88b
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-1.c
@@ -0,0 +1,43 @@
+/* { dg-additional-options "-w" } */
+
+#include <assert.h>
+
+/* Test of reduction on loop directive (vectors, private reduction
+   variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[1024], out[32], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       private(res) copyout(out)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+        res = 0;
+
+	#pragma acc loop vector reduction(+:res)
+	for (i = 0; i < 32; i++)
+	  res += arr[j * 32 + i];
+
+	out[j] = res;
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    {
+      hres = 0;
+
+      for (i = 0; i < 32; i++)
+	hres += arr[j * 32 + i];
+
+      assert (out[j] == hres);
+    }
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
new file mode 100644
index 00000000000..15f0053e5bc
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-vector-p-2.c
@@ -0,0 +1,41 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (vector reduction in
+   gang-partitioned/worker-partitioned mode, private reduction variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, k;
+  double ina[1024], inb[1024], out[1024], acc;
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 32; i++)
+      {
+        ina[j * 32 + i] = (i == j) ? 2.0 : 0.0;
+	inb[j * 32 + i] = (double) (i + j);
+      }
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       private(acc) copyin(ina, inb) copyout(out)
+  {
+    #pragma acc loop gang worker
+    for (k = 0; k < 32; k++)
+      for (j = 0; j < 32; j++)
+        {
+	  acc = 0;
+
+	  #pragma acc loop vector reduction(+:acc)
+	  for (i = 0; i < 32; i++)
+	    acc += ina[k * 32 + i] * inb[i * 32 + j];
+
+	  out[k * 32 + j] = acc;
+	}
+  }
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 32; i++)
+      assert (out[j * 32 + i] == (i + j) * 2);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
new file mode 100644
index 00000000000..4a925036a5b
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-worker-p-1.c
@@ -0,0 +1,43 @@
+/* { dg-additional-options "-w" } */
+
+#include <assert.h>
+
+/* Test of reduction on loop directive (workers, private reduction
+   variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[1024], out[32], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       private(res) copyout(out)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+        res = 0;
+
+	#pragma acc loop worker reduction(+:res)
+	for (i = 0; i < 32; i++)
+	  res += arr[j * 32 + i];
+
+	out[j] = res;
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    {
+      hres = 0;
+
+      for (i = 0; i < 32; i++)
+	hres += arr[j * 32 + i];
+
+      assert (out[j] == hres);
+    }
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
new file mode 100644
index 00000000000..1bfb284cb3b
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-1.c
@@ -0,0 +1,41 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (workers and vectors, private reduction
+   variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[1024], out[32], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       private(res) copyout(out)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+        res = 0;
+
+	#pragma acc loop worker vector reduction(+:res)
+	for (i = 0; i < 32; i++)
+	  res += arr[j * 32 + i];
+
+	out[j] = res;
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    {
+      hres = 0;
+
+      for (i = 0; i < 32; i++)
+	hres += arr[j * 32 + i];
+
+      assert (out[j] == hres);
+    }
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
new file mode 100644
index 00000000000..93ab78f106a
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-2.c
@@ -0,0 +1,45 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (workers and vectors, private reduction
+   variable).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[32768], out[32], res = 0, hres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       private(res) copyout(out)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+        res = j;
+
+	#pragma acc loop worker reduction(+:res)
+	for (i = 0; i < 1024; i++)
+	  res += arr[j * 1024 + i];
+
+	#pragma acc loop vector reduction(+:res)
+	for (i = 1023; i >= 0; i--)
+	  res += arr[j * 1024 + i];
+
+	out[j] = res;
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    {
+      hres = j;
+
+      for (i = 0; i < 1024; i++)
+	hres += arr[j * 1024 + i] * 2;
+
+      assert (out[j] == hres);
+    }
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
new file mode 100644
index 00000000000..298e25c87d2
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-reduction-wv-p-3.c
@@ -0,0 +1,38 @@
+#include <assert.h>
+
+/* Test of reduction on loop directive (workers and vectors, private reduction
+   variable: gang-redundant mode).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, arr[1024], out[32], res = 0, hres = 0;
+
+  for (i = 0; i < 1024; i++)
+    arr[i] = i ^ 33;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       private(res) copyin(arr) copyout(out)
+  {
+    /* Private variables aren't initialized by default in openacc.  */
+    res = 0;
+
+    /* "res" should be available at the end of the following loop (and should
+       have the same value redundantly in each gang).  */
+    #pragma acc loop worker vector reduction(+:res)
+    for (i = 0; i < 1024; i++)
+      res += arr[i];
+
+    #pragma acc loop gang (static: 1)
+    for (i = 0; i < 32; i++)
+      out[i] = res;
+  }
+
+  for (i = 0; i < 1024; i++)
+    hres += arr[i];
+
+  for (i = 0; i < 32; i++)
+    assert (out[i] == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
new file mode 100644
index 00000000000..5e82e1d350c
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-1.c
@@ -0,0 +1,38 @@
+#include <assert.h>
+
+/* Test of reduction on both parallel and loop directives (worker and
+   vector-partitioned loops individually in gang-partitioned mode, int
+   type).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[32768], res = 0, hres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+    reduction(+:res) copy(res)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+	#pragma acc loop worker reduction(+:res)
+	for (i = 0; i < 1024; i++)
+	  res += arr[j * 1024 + i];
+
+	#pragma acc loop vector reduction(+:res)
+	for (i = 1023; i >= 0; i--)
+	  res += arr[j * 1024 + i];
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 1024; i++)
+      hres += arr[j * 1024 + i] * 2;
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
new file mode 100644
index 00000000000..a7a75a94104
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-2.c
@@ -0,0 +1,40 @@
+#include <assert.h>
+
+/* Test of reduction on both parallel and loop directives (workers and vectors
+   in gang-partitioned mode, int type with XOR).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j, arr[32768], res = 0, hres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+		       reduction(^:res)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+	#pragma acc loop worker vector reduction(^:res)
+	for (i = 0; i < 1024; i++)
+	  res ^= arr[j * 1024 + i];
+
+	#pragma acc loop worker vector reduction(^:res)
+	for (i = 0; i < 1024; i++)
+	  res ^= arr[j * 1024 + (1023 - i)];
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 1024; i++)
+      {
+        hres ^= arr[j * 1024 + i];
+	hres ^= arr[j * 1024 + (1023 - i)];
+      }
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
new file mode 100644
index 00000000000..8d85fedc867
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-3.c
@@ -0,0 +1,42 @@
+#include <assert.h>
+
+/* Test of reduction on both parallel and loop directives (workers and vectors
+   together in gang-partitioned mode, float type).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j;
+  float arr[32768];
+  float res = 0, hres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+    reduction(+:res) copy(res)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+	#pragma acc loop worker vector reduction(+:res)
+	for (i = 0; i < 1024; i++)
+	  res += arr[j * 1024 + i];
+
+	#pragma acc loop worker vector reduction(+:res)
+	for (i = 0; i < 1024; i++)
+	  res += arr[j * 1024 + (1023 - i)];
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 1024; i++)
+      {
+        hres += arr[j * 1024 + i];
+	hres += arr[j * 1024 + (1023 - i)];
+      }
+
+  assert (res == hres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
new file mode 100644
index 00000000000..1904b4aa1e4
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-loop-comb-reduction-4.c
@@ -0,0 +1,55 @@
+#include <assert.h>
+
+/* Test of reduction on both parallel and loop directives (workers and vectors
+   together in gang-partitioned mode, float type, multiple reductions).  */
+
+int
+main (int argc, char *argv[])
+{
+  int i, j;
+  float arr[32768];
+  float res = 0, mres = 0, hres = 0, hmres = 0;
+
+  for (i = 0; i < 32768; i++)
+    arr[i] = i;
+
+  #pragma acc parallel num_gangs(32) num_workers(32) vector_length(32) \
+    reduction(+:res) reduction(max:mres) copy(res, mres)
+  {
+    #pragma acc loop gang
+    for (j = 0; j < 32; j++)
+      {
+	#pragma acc loop worker vector reduction(+:res) reduction(max:mres)
+	for (i = 0; i < 1024; i++)
+	  {
+	    res += arr[j * 1024 + i];
+	    if (arr[j * 1024 + i] > mres)
+	      mres = arr[j * 1024 + i];
+	  }
+
+	#pragma acc loop worker vector reduction(+:res) reduction(max:mres)
+	for (i = 0; i < 1024; i++)
+	  {
+	    res += arr[j * 1024 + (1023 - i)];
+	    if (arr[j * 1024 + (1023 - i)] > mres)
+	      mres = arr[j * 1024 + (1023 - i)];
+	  }
+      }
+  }
+
+  for (j = 0; j < 32; j++)
+    for (i = 0; i < 1024; i++)
+      {
+        hres += arr[j * 1024 + i];
+	hres += arr[j * 1024 + (1023 - i)];
+	if (arr[j * 1024 + i] > hmres)
+	  hmres = arr[j * 1024 + i];
+	if (arr[j * 1024 + (1023 - i)] > hmres)
+	  hmres = arr[j * 1024 + (1023 - i)];
+      }
+
+  assert (res == hres);
+  assert (mres == hmres);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
index dceac39cf15..a88b60f39f0 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-1.c
@@ -1,40 +1,54 @@
+/* { dg-additional-options "-w" } */
+
 #include <assert.h>
 
+/* Test of reduction on parallel directive.  */
+
+#define ACTUAL_GANGS 256
+
 int
 main (int argc, char *argv[])
 {
-  int res, res2 = 0;
+  int res, res1 = 0, res2 = 0;
 
 #if defined(ACC_DEVICE_TYPE_host)
 # define GANGS 1
 #else
 # define GANGS 256
 #endif
-  #pragma acc parallel num_gangs(GANGS) copy(res2)
+  #pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
+    reduction(+:res1) copy(res2, res1)
   {
+    res1 += 5;
+
     #pragma acc atomic
     res2 += 5;
   }
   res = GANGS * 5;
 
+  assert (res == res1);
   assert (res == res2);
 #undef GANGS
 
-  res = res2 = 1;
+  res = res1 = res2 = 1;
 
 #if defined(ACC_DEVICE_TYPE_host)
 # define GANGS 1
 #else
 # define GANGS 8
 #endif
-  #pragma acc parallel num_gangs(GANGS) copy(res2)
+  #pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
+    reduction(*:res1) copy(res1, res2)
   {
+    res1 *= 5;
+
     #pragma acc atomic
     res2 *= 5;
   }
   for (int i = 0; i < GANGS; ++i)
     res *= 5;
 
+  assert (res == res1);
   assert (res == res2);
 #undef GANGS
 
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
index bd5715c675c..911b76cc9be 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/par-reduction-2.c
@@ -1,18 +1,25 @@
+/* { dg-additional-options "-w" } */
+
 #include <assert.h>
 #include <openacc.h>
 
+/* Test of reduction on parallel directive (with async).  */
+
 int
 main (int argc, char *argv[])
 {
-  int res, res2 = 0;
+  int res, res1 = 0, res2 = 0;
 
 #if defined(ACC_DEVICE_TYPE_host)
 # define GANGS 1
 #else
 # define GANGS 256
 #endif
-  #pragma acc parallel num_gangs(GANGS) copy(res2) async(1)
+  #pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
+    reduction(+:res1) copy(res1, res2) async(1)
   {
+    res1 += 5;
+
     #pragma acc atomic
     res2 += 5;
   }
@@ -20,18 +27,22 @@ main (int argc, char *argv[])
 
   acc_wait (1);
 
+  assert (res == res1);
   assert (res == res2);
 #undef GANGS
 
-  res = res2 = 1;
+  res = res1 = res2 = 1;
 
 #if defined(ACC_DEVICE_TYPE_host)
 # define GANGS 1
 #else
 # define GANGS 8
 #endif
-  #pragma acc parallel num_gangs(GANGS) copy(res2) async(1)
+  #pragma acc parallel num_gangs(GANGS) num_workers(32) vector_length(32) \
+    reduction(*:res1) copy(res1, res2) async(1)
   {
+    res1 *= 5;
+
     #pragma acc atomic
     res2 *= 5;
   }
@@ -40,6 +51,7 @@ main (int argc, char *argv[])
 
   acc_wait (1);
 
+  assert (res == res1);
   assert (res == res2);
 
   return 0;
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
index 39357ce357b..f5766a404b4 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c
@@ -5,12 +5,20 @@
 
 int main ()
 {
+  int dummy[10];
+
 #pragma acc parallel num_workers (2<<20) /* { dg-error "using num_workers" } */
   {
+#pragma acc loop worker
+    for (int  i = 0; i < 10; i++)
+      dummy[i] = i;
   }
 
 #pragma acc parallel vector_length (2<<20) /* { dg-error "using vector_length" } */
   {
+#pragma acc loop vector
+    for (int  i = 0; i < 10; i++)
+      dummy[i] = i;
   }
 
   return 0;
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
new file mode 100644
index 00000000000..b2c60e52697
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-reduction.c
@@ -0,0 +1,72 @@
+/* { dg-do run } */
+/* { dg-additional-options "-w" } */
+
+#include <stdlib.h>
+#include <openacc.h>
+
+#define N 10
+
+int
+main ()
+{
+  int s1 = 0, s2 = 0;
+  int i;
+  int dummy = 0;
+
+#pragma acc data copy (dummy)
+  {
+#pragma acc parallel num_gangs (N) reduction (+:s1) copy(s1)
+    {
+      s1++;
+    }
+  }
+
+  if (acc_get_device_type () != acc_device_nvidia)
+    {
+      if (s1 != 1)
+	abort ();
+    }
+  else
+    {
+      if (s1 != N)
+	abort ();
+    }
+
+  s1 = 0;
+  s2 = 0;
+
+#pragma acc parallel num_gangs (10) reduction (+:s1, s2) copy(s1, s2)
+  {
+    s1++;
+    s2 += N;
+  }
+
+  if (acc_get_device_type () != acc_device_nvidia)
+    {
+      if (s1 != 1)
+	abort ();
+      if (s2 != N)
+	abort ();
+    }
+  else
+    {
+      if (s1 != N)
+	abort ();
+      if (s2 != N*N)
+	abort ();
+    }
+
+  s1 = 0;
+
+#pragma acc parallel num_gangs (10) reduction (+:s1) copy(s1)
+  {
+#pragma acc loop gang reduction (+:s1)
+    for (i = 0; i < 10; i++)
+      s1++;
+  }
+
+  if (s1 != N)
+    abort ();
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
new file mode 100644
index 00000000000..6d5222249b6
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70289.c
@@ -0,0 +1,13 @@
+int
+main ()
+{
+  int i;
+  static int temp;
+
+#pragma acc parallel reduction(+:temp)
+  {
+    temp++;
+  }
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
new file mode 100644
index 00000000000..af629c83ef7
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr70373.c
@@ -0,0 +1,20 @@
+#define N 32
+
+int
+foo (unsigned int sum)
+{
+#pragma acc parallel reduction (+:sum)
+  {
+    sum;
+  }
+
+  return sum;
+}
+
+int
+main (void)
+{
+  unsigned int sum = 0;
+  foo (sum);
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
index e55793136f3..10eb2788bd9 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c
@@ -1,46 +1,59 @@
 /* { dg-do run } */
 
+/* Ignore vector_length warnings for offloaded (nvptx) targets.  */
+/* { dg-additional-options "-foffload=-w" } */
+
 /* Integer reductions.  */
 
 #include <stdlib.h>
-#include <stdbool.h>
-
-#define vl 32
-
-#define DO_PRAGMA(x) _Pragma (#x)
-
-#define check_reduction_op(type, op, init, b)	\
-  {						\
-    type res, vres;				\
-    res = (init);				\
-    DO_PRAGMA (acc parallel vector_length (vl) copy(res))	\
-DO_PRAGMA (acc loop reduction (op:res))\
-    for (i = 0; i < n; i++)			\
-      res = res op (b);				\
-						\
-    vres = (init);				\
-    for (i = 0; i < n; i++)			\
-      vres = vres op (b);			\
-						\
-    if (res != vres)				\
-      abort ();					\
-  }
+#include "reduction.h"
+
+const int ng = 8;
+const int nw = 4;
+const int vl = 32;
 
 static void
-test_reductions_int (void)
+test_reductions (void)
 {
-  const int n = 1000;
+  const int n = 100;
   int i;
   int array[n];
 
   for (i = 0; i < n; i++)
-    array[i] = i;
-
-  check_reduction_op (int, +, 0, array[i]);
-  check_reduction_op (int, *, 1, array[i]);
-  check_reduction_op (int, &, -1, array[i]);
-  check_reduction_op (int, |, 0, array[i]);
-  check_reduction_op (int, ^, 0, array[i]);
+    array[i] = i+1;
+
+  /* Gang reductions.  */
+  check_reduction_op (int, +, 0, array[i], num_gangs (ng), gang);
+  check_reduction_op (int, *, 1, array[i], num_gangs (ng), gang);
+  check_reduction_op (int, &, -1, array[i], num_gangs (ng), gang);
+  check_reduction_op (int, |, 0, array[i], num_gangs (ng), gang);
+  check_reduction_op (int, ^, 0, array[i], num_gangs (ng), gang);
+
+  /* Worker reductions.  */
+  check_reduction_op (int, +, 0, array[i], num_workers (nw), worker);
+  check_reduction_op (int, *, 1, array[i], num_workers (nw), worker);
+  check_reduction_op (int, &, -1, array[i], num_workers (nw), worker);
+  check_reduction_op (int, |, 0, array[i], num_workers (nw), worker);
+  check_reduction_op (int, ^, 0, array[i], num_workers (nw), worker);
+
+  /* Vector reductions.  */
+  check_reduction_op (int, +, 0, array[i], vector_length (vl), vector);
+  check_reduction_op (int, *, 1, array[i], vector_length (vl), vector);
+  check_reduction_op (int, &, -1, array[i], vector_length (vl), vector);
+  check_reduction_op (int, |, 0, array[i], vector_length (vl), vector);
+  check_reduction_op (int, ^, 0, array[i], vector_length (vl), vector);
+
+  /* Combined reductions.  */
+  check_reduction_op (int, +, 0, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
+  check_reduction_op (int, *, 1, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
+  check_reduction_op (int, &, -1, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
+  check_reduction_op (int, |, 0, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
+  check_reduction_op (int, ^, 0, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
 }
 
 static void
@@ -55,29 +68,31 @@ test_reductions_bool (void)
     array[i] = i;
 
   cmp_val = 5;
-  check_reduction_op (bool, &&, true, (cmp_val > array[i]));
-  check_reduction_op (bool, ||, false, (cmp_val > array[i]));
-}
 
-#define check_reduction_macro(type, op, init, b)	\
-  {							\
-    type res, vres;					\
-    res = (init);					\
-DO_PRAGMA (acc parallel vector_length (vl) copy(res))\
-DO_PRAGMA (acc loop reduction (op:res))\
-    for (i = 0; i < n; i++)				\
-      res = op (res, (b));				\
-							\
-    vres = (init);					\
-    for (i = 0; i < n; i++)				\
-      vres = op (vres, (b));				\
-							\
-    if (res != vres)					\
-      abort ();						\
-  }
-
-#define max(a, b) (((a) > (b)) ? (a) : (b))
-#define min(a, b) (((a) < (b)) ? (a) : (b))
+  /* Gang reductions.  */
+  check_reduction_op (int, &&, 1, (cmp_val > array[i]), num_gangs (ng),
+		      gang);
+  check_reduction_op (int, ||, 0, (cmp_val > array[i]), num_gangs (ng),
+		      gang);
+
+  /* Worker reductions.  */
+  check_reduction_op (int, &&, 1, (cmp_val > array[i]), num_workers (nw),
+		      worker);
+  check_reduction_op (int, ||, 0, (cmp_val > array[i]), num_workers (nw),
+		      worker);
+
+  /* Vector reductions.  */
+  check_reduction_op (int, &&, 1, (cmp_val > array[i]), vector_length (vl),
+		      vector);
+  check_reduction_op (int, ||, 0, (cmp_val > array[i]), vector_length (vl),
+		      vector);
+
+  /* Combined reductions.  */
+  check_reduction_op (int, &&, 1, (cmp_val > array[i]), num_gangs (ng)
+		      num_workers (nw) vector_length (vl), gang worker vector);
+  check_reduction_op (int, ||, 0, (cmp_val > array[i]), num_gangs (ng)
+		      num_workers (nw) vector_length (vl), gang worker vector);
+}
 
 static void
 test_reductions_minmax (void)
@@ -89,14 +104,32 @@ test_reductions_minmax (void)
   for (i = 0; i < n; i++)
     array[i] = i;
 
-  check_reduction_macro (int, min, n + 1, array[i]);
-  check_reduction_macro (int, max, -1, array[i]);
+  /* Gang reductions.  */
+  check_reduction_macro (int, min, n + 1, array[i], num_gangs (ng), gang);
+  check_reduction_macro (int, max, -1, array[i], num_gangs (ng), gang);
+
+  /* Worker reductions.  */
+  check_reduction_macro (int, min, n + 1, array[i], num_workers (nw), worker);
+  check_reduction_macro (int, max, -1, array[i], num_workers (nw), worker);
+
+  /* Vector reductions.  */
+  check_reduction_macro (int, min, n + 1, array[i], vector_length (vl),
+			 vector);
+  check_reduction_macro (int, max, -1, array[i], vector_length (vl), vector);
+
+  /* Combined reductions.  */
+  check_reduction_macro (int, min, n + 1, array[i], num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
+  check_reduction_macro (int, max, -1, array[i], num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
 }
 
 int
 main (void)
 {
-  test_reductions_int ();
+  test_reductions ();
   test_reductions_bool ();
   test_reductions_minmax ();
   return 0;
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
index 8a0b0d6df60..7cb94971559 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c
@@ -1,124 +1,83 @@
 /* { dg-do run } */
 
+/* Ignore vector_length warnings for offloaded (nvptx) targets.  */
+/* { dg-additional-options "-foffload=-w" } */
+
 /* float reductions.  */
 
 #include <stdlib.h>
-#include <stdbool.h>
-#include <math.h>
+#include "reduction.h"
 
-#define vl 32
+const int ng = 8;
+const int nw = 4;
+const int vl = 32;
 
-int
-main(void)
+static void
+test_reductions (void)
 {
-  const int n = 1000;
+  const int n = 100;
   int i;
-  float vresult, result, array[n];
-  bool lvresult, lresult;
+  float array[n];
 
   for (i = 0; i < n; i++)
-    array[i] = i;
-
-  result = 0;
-  vresult = 0;
+    array[i] = i+1;
 
-  /* '+' reductions.  */
-#pragma acc parallel vector_length (vl) copy(result)
-#pragma acc loop reduction (+:result)
-  for (i = 0; i < n; i++)
-    result += array[i];
+  /* Gang reductions.  */
+  check_reduction_op (float, +, 0, array[i], num_gangs (ng), gang);
+  check_reduction_op (float, *, 1, array[i], num_gangs (ng), gang);
 
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    vresult += array[i];
-
-  if (result != vresult)
-    abort ();
-
-  result = 0;
-  vresult = 0;
-
-  /* '*' reductions.  */
-#pragma acc parallel vector_length (vl) copy(result)
-#pragma acc loop reduction (*:result)
-  for (i = 0; i < n; i++)
-    result *= array[i];
+  /* Worker reductions.  */
+  check_reduction_op (float, +, 0, array[i], num_workers (nw), worker);
+  check_reduction_op (float, *, 1, array[i], num_workers (nw), worker);
 
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    vresult *= array[i];
-
-  if (fabs(result - vresult) > .0001)
-    abort ();
-  result = 0;
-  vresult = 0;
-
-  /* 'max' reductions.  */
-#pragma acc parallel vector_length (vl) copy(result)
-#pragma acc loop reduction (max:result)
-  for (i = 0; i < n; i++)
-    result = result > array[i] ? result : array[i];
-
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    vresult = vresult > array[i] ? vresult : array[i];
-
-  if (result != vresult)
-    abort ();
-
-  result = 0;
-  vresult = 0;
-
-  /* 'min' reductions.  */
-#pragma acc parallel vector_length (vl) copy(result)
-#pragma acc loop reduction (min:result)
-  for (i = 0; i < n; i++)
-    result = result < array[i] ? result : array[i];
+  /* Vector reductions.  */
+  check_reduction_op (float, +, 0, array[i], vector_length (vl), vector);
+  check_reduction_op (float, *, 1, array[i], vector_length (vl), vector);
 
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    vresult = vresult < array[i] ? vresult : array[i];
-
-  if (result != vresult)
-    abort ();
-
-  result = 5;
-  vresult = 5;
-
-  lresult = false;
-  lvresult = false;
-
-  /* '&&' reductions.  */
-#pragma acc parallel vector_length (vl) copy(lresult)
-#pragma acc loop reduction (&&:lresult)
-  for (i = 0; i < n; i++)
-    lresult = lresult && (result > array[i]);
-
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    lvresult = lresult && (result > array[i]);
-
-  if (lresult != lvresult)
-    abort ();
-
-  result = 5;
-  vresult = 5;
-
-  lresult = false;
-  lvresult = false;
+  /* Combined reductions.  */
+  check_reduction_op (float, +, 0, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
+  check_reduction_op (float, *, 1, array[i], num_gangs (ng) num_workers (nw)
+		      vector_length (vl), gang worker vector);
+}
 
-  /* '||' reductions.  */
-#pragma acc parallel vector_length (vl) copy(lresult)
-#pragma acc loop reduction (||:lresult)
-  for (i = 0; i < n; i++)
-    lresult = lresult || (result > array[i]);
+static void
+test_reductions_minmax (void)
+{
+  const int n = 1000;
+  int i;
+  float array[n];
 
-  /* Verify the reduction.  */
   for (i = 0; i < n; i++)
-    lvresult = lresult || (result > array[i]);
+    array[i] = i;
 
-  if (lresult != lvresult)
-    abort ();
+  /* Gang reductions.  */
+  check_reduction_macro (float, min, n + 1, array[i], num_gangs (ng), gang);
+  check_reduction_macro (float, max, -1, array[i], num_gangs (ng), gang);
+
+  /* Worker reductions.  */
+  check_reduction_macro (float, min, n + 1, array[i], num_workers (nw),
+			 worker);
+  check_reduction_macro (float, max, -1, array[i], num_workers (nw), worker);
+
+  /* Vector reductions.  */
+  check_reduction_macro (float, min, n + 1, array[i], vector_length (vl),
+			 vector);
+  check_reduction_macro (float, max, -1, array[i], vector_length (vl), vector);
+
+  /* Combined reductions.  */
+  check_reduction_macro (float, min, n + 1, array[i], num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
+  check_reduction_macro (float, max, -1, array[i], num_gangs (ng)
+			 num_workers (nw)vector_length (vl), gang worker
+			 vector);
+}
 
+int
+main (void)
+{
+  test_reductions ();
+  test_reductions_minmax ();
   return 0;
 }
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
index a233e29229c..1b948bef5a0 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c
@@ -1,93 +1,84 @@
 /* { dg-do run } */
 
+/* Ignore vector_length warnings for offloaded (nvptx) targets.  */
+/* { dg-additional-options "-foffload=-w" } */
+
 /* double reductions.  */
 
 #include <stdlib.h>
-#include <stdbool.h>
-#include <math.h>
+#include "reduction.h"
 
-#define vl 32
+const int ng = 8;
+const int nw = 4;
+const int vl = 32;
 
-int
-main(void)
+static void
+test_reductions (void)
 {
-  const int n = 1000;
+  const int n = 10;
   int i;
-  double vresult, result, array[n];
-  bool lvresult, lresult;
-
-  for (i = 0; i < n; i++)
-    array[i] = i;
-
-  result = 0;
-  vresult = 0;
-
-  /* 'max' reductions.  */
-#pragma acc parallel vector_length (vl) copy(result)
-#pragma acc loop reduction (max:result)
-  for (i = 0; i < n; i++)
-    result = result > array[i] ? result : array[i];
-
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    vresult = vresult > array[i] ? vresult : array[i];
-
-  if (result != vresult)
-    abort ();
-
-  result = 0;
-  vresult = 0;
-
-  /* 'min' reductions.  */
-#pragma acc parallel vector_length (vl) copy(result)
-#pragma acc loop reduction (min:result)
-  for (i = 0; i < n; i++)
-    result = result < array[i] ? result : array[i];
+  double array[n];
 
-  /* Verify the reduction.  */
   for (i = 0; i < n; i++)
-    vresult = vresult < array[i] ? vresult : array[i];
+    array[i] = i+1;
 
-  if (result != vresult)
-    abort ();
+  /* Gang reductions.  */
+  check_reduction_op (double, +, 0, array[i], num_gangs (ng), gang);
+  check_reduction_op (double, *, 1, array[i], num_gangs (ng), gang);
 
-  result = 5;
-  vresult = 5;
+  /* Worker reductions.  */
+  check_reduction_op (double, +, 0, array[i], num_workers (nw), worker);
+  check_reduction_op (double, *, 1, array[i], num_workers (nw), worker);
 
-  lresult = false;
-  lvresult = false;
+  /* Vector reductions.  */
+  check_reduction_op (double, +, 0, array[i], vector_length (vl), vector);
+  check_reduction_op (double, *, 1, array[i], vector_length (vl), vector);
 
-  /* '&&' reductions.  */
-#pragma acc parallel vector_length (vl) copy(lresult)
-#pragma acc loop reduction (&&:lresult)
-  for (i = 0; i < n; i++)
-    lresult = lresult && (result > array[i]);
-
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    lvresult = lresult && (result > array[i]);
-
-  if (lresult != lvresult)
-    abort ();
-
-  result = 5;
-  vresult = 5;
-
-  lresult = false;
-  lvresult = false;
+  /* Combined reductions.  */
+  check_reduction_op (double, +, 0, array[i], num_gangs (ng)  num_workers (nw)
+		      vector_length (vl), gang worker vector);
+  check_reduction_op (double, *, 1, array[i], num_gangs (ng)  num_workers (nw)
+		      vector_length (vl), gang worker vector);
+}
 
-  /* '||' reductions.  */
-#pragma acc parallel vector_length (vl) copy(lresult)
-#pragma acc loop reduction (||:lresult)
-  for (i = 0; i < n; i++)
-    lresult = lresult || (result > array[i]);
+static void
+test_reductions_minmax (void)
+{
+  const int n = 1000;
+  int i;
+  double array[n];
 
-  /* Verify the reduction.  */
   for (i = 0; i < n; i++)
-    lvresult = lresult || (result > array[i]);
+    array[i] = i;
 
-  if (lresult != lvresult)
-    abort ();
+  /* Gang reductions.  */
+  check_reduction_macro (double, min, n + 1, array[i], num_gangs (ng), gang);
+  check_reduction_macro (double, max, -1, array[i], num_gangs (ng), gang);
+
+  /* Worker reductions.  */
+  check_reduction_macro (double, min, n + 1, array[i], num_workers (nw),
+			 worker);
+  check_reduction_macro (double, max, -1, array[i], num_workers (nw), worker);
+
+  /* Vector reductions.  */
+  check_reduction_macro (double, min, n + 1, array[i], vector_length (vl),
+			 vector);
+  check_reduction_macro (double, max, -1, array[i], vector_length (vl),
+			 vector);
+
+  /* Combined reductions.  */
+  check_reduction_macro (double, min, n + 1, array[i], num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
+  check_reduction_macro (double, max, -1, array[i], num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
+}
 
+int
+main (void)
+{
+  test_reductions ();
+  test_reductions_minmax ();
   return 0;
 }
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
index 59d49c1b7a1..79355eded80 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c
@@ -1,59 +1,56 @@
 /* { dg-do run { target { ! { hppa*-*-hpux* } } } } */
 
+/* Ignore vector_length warnings for offloaded (nvptx) targets.  */
+/* { dg-additional-options "-foffload=-w" } */
+
 /* complex reductions.  */
 
 #include <stdlib.h>
-#include <stdbool.h>
-#include <math.h>
 #include <complex.h>
+#include "reduction.h"
 
-#define vl 32
+const int ng = 8;
+const int nw = 4;
+const int vl = 32;
 
-int
-main(void)
+static void
+test_reductions (void)
 {
-  const int n = 1000;
+  const int n = 10;
   int i;
-  double _Complex vresult, result, array[n];
-  bool lvresult, lresult;
-
-  for (i = 0; i < n; i++)
-    array[i] = i;
-
-  result = 0;
-  vresult = 0;
-
-  /* '&&' reductions.  */
-#pragma acc parallel vector_length (vl) copy(lresult)
-#pragma acc loop reduction (&&:lresult)
-  for (i = 0; i < n; i++)
-    lresult = lresult && (creal(result) > creal(array[i]));
-
-  /* Verify the reduction.  */
-  for (i = 0; i < n; i++)
-    lvresult = lresult && (creal(result) > creal(array[i]));
+  double _Complex array[n];
 
-  if (lresult != lvresult)
-    abort ();
-
-  result = 5;
-  vresult = 5;
-
-  lresult = false;
-  lvresult = false;
-
-  /* '||' reductions.  */
-#pragma acc parallel vector_length (vl) copy(lresult)
-#pragma acc loop reduction (||:lresult)
-  for (i = 0; i < n; i++)
-    lresult = lresult || (creal(result) > creal(array[i]));
-
-  /* Verify the reduction.  */
   for (i = 0; i < n; i++)
-    lvresult = lresult || (creal(result) > creal(array[i]));
-
-  if (lresult != lvresult)
-    abort ();
+    array[i] = i+1;
+
+  /* Gang reductions.  */
+  check_reduction_op (double, +, 0, creal (array[i]), num_gangs (ng), gang);
+  check_reduction_op (double, *, 1, creal (array[i]), num_gangs (ng), gang);
+
+  /* Worker reductions.  */
+  check_reduction_op (double, +, 0, creal (array[i]), num_workers (nw),
+		      worker);
+  check_reduction_op (double, *, 1, creal (array[i]), num_workers (nw),
+		      worker);
+
+  /* Vector reductions.  */
+  check_reduction_op (double, +, 0, creal (array[i]), vector_length (vl),
+		      vector);
+  check_reduction_op (double, *, 1, creal (array[i]), vector_length (vl),
+		      vector);
+
+  /* Combined reductions.  */
+  check_reduction_op (double, +, 0, creal (array[i]), num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
+  check_reduction_op (double, *, 1, creal (array[i]), num_gangs (ng)
+			 num_workers (nw) vector_length (vl), gang worker
+			 vector);
+}
 
+int
+main (void)
+{
+  test_reductions ();
   return 0;
 }
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
index efe87027bbf..46b553a61ff 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c
@@ -1,32 +1,57 @@
+/* { dg-do run } */
+/* { dg-additional-options "-w" } */
+
+/* Ignore vector_length warnings for offloaded (nvptx) targets.  */
+/* { dg-additional-options "-foffload=-w" } */
+
+/* Multiple reductions.  */
+
 #include <stdio.h>
 #include <stdlib.h>
 
+const int ng = 8;
+const int nw = 4;
+const int vl = 32;
+
+const int n = 100;
+
+#define DO_PRAGMA(x) _Pragma (#x)
+
+#define check_reduction(gwv_par, gwv_loop)		\
+  {							\
+  s1 = 2; s2 = 5;					\
+DO_PRAGMA (acc parallel gwv_par copy (s1, s2))		\
+DO_PRAGMA (acc loop gwv_loop reduction (+:s1, s2))	\
+    for (i = 0; i < n; i++)				\
+      {							\
+         s1 = s1 + 3;					\
+         s2 = s2 + 5;					\
+      }							\
+							\
+    if (s1 != v1 && s2 != v2)				\
+      abort ();						\
+  }
+
 int
 main (void)
 {
   int s1 = 2, s2 = 5, v1 = 2, v2 = 5;
-  int n = 100;
   int i;
 
-#pragma acc parallel vector_length (32) copy(s1,s2)
-#pragma acc loop reduction (+:s1, s2)
-  for (i = 0; i < n; i++)
-    {
-      s1 = s1 + 3;
-      s2 = s2 + 2;
-    }
-
   for (i = 0; i < n; i++)
     {
       v1 = v1 + 3;
       v2 = v2 + 2;
     }
-  
-  if (s1 != v1)
-    abort ();
-  
-  if (s2 != v2)
-    abort ();
-    
+
+  check_reduction (num_gangs (ng), gang);
+
+  /* Nvptx targets require a vector_length or 32 in to allow spinlocks with
+     gangs.  */
+  check_reduction (num_workers (nw) vector_length (vl), worker);
+  check_reduction (vector_length (vl), vector);
+  check_reduction (num_gangs (ng) num_workers (nw) vector_length (vl), gang
+		   worker vector);
+
   return 0;
 }
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
new file mode 100644
index 00000000000..af30b31bd34
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-6.c
@@ -0,0 +1,36 @@
+/* { dg-do run } */
+/* { dg-additional-options "-w" } */
+
+/* Test reductions on explicitly private variables.  */
+
+#include <assert.h>
+
+int
+main ()
+{
+  int i, j, red[10];
+  int v;
+
+  for (i = 0; i < 10; i++)
+    red[i] = -1;
+
+#pragma acc parallel copyout(red)
+  {
+#pragma acc loop gang private(v)
+    for (j = 0; j < 10; j++)
+      {
+	v = j;
+
+#pragma acc loop vector reduction (+:v)
+	for (i = 0; i < 100; i++)
+	  v++;
+
+	red[j] = v;
+      }
+  }
+
+  for (i = 0; i < 10; i++)
+    assert (red[i] == i + 100);
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
new file mode 100644
index 00000000000..1b3f8d45ace
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/reduction.h
@@ -0,0 +1,43 @@
+#ifndef REDUCTION_H
+#define REDUCTION_H
+
+#define DO_PRAGMA(x) _Pragma (#x)
+
+#define check_reduction_op(type, op, init, b, gwv_par, gwv_loop)	\
+  {									\
+    type res, vres;							\
+    res = (init);							\
+DO_PRAGMA (acc parallel gwv_par copy (res))				\
+DO_PRAGMA (acc loop gwv_loop reduction (op:res))			\
+    for (i = 0; i < n; i++)						\
+      res = res op (b);							\
+									\
+    vres = (init);							\
+    for (i = 0; i < n; i++)						\
+      vres = vres op (b);						\
+									\
+    if (res != vres)							\
+      abort ();								\
+  }
+
+#define check_reduction_macro(type, op, init, b, gwv_par, gwv_loop)	\
+  {									\
+    type res, vres;							\
+    res = (init);							\
+    DO_PRAGMA (acc parallel gwv_par copy(res))				\
+DO_PRAGMA (acc loop gwv_loop reduction (op:res))			\
+    for (i = 0; i < n; i++)						\
+      res = op (res, (b));						\
+									\
+    vres = (init);							\
+    for (i = 0; i < n; i++)						\
+      vres = op (vres, (b));						\
+									\
+    if (res != vres)							\
+      abort ();								\
+  }
+
+#define max(a, b) (((a) > (b)) ? (a) : (b))
+#define min(a, b) (((a) < (b)) ? (a) : (b))
+
+#endif
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90 b/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
new file mode 100644
index 00000000000..31db7e12454
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-fortran/parallel-reduction.f90
@@ -0,0 +1,47 @@
+! { dg-do run }
+! { dg-additional-options "-w" }
+
+program reduction
+  implicit none
+  integer, parameter :: n = 10
+  integer s1, s2
+  include "openacc_lib.h"
+
+  s1 = 0
+  s2 = 0
+
+  !$acc parallel reduction(+:s1,s2) num_gangs (n) copy(s1)
+  s1 = s1 + 1
+  s2 = s2 + 1
+  !$acc end parallel
+
+  if (acc_get_device_type () .eq. acc_device_nvidia) then
+     if (s1 .ne. n) call abort
+     if (s2 .ne. n) call abort
+  else
+     if (s1 .ne. 1) call abort
+     if (s2 .ne. 1) call abort
+  end if
+
+  ! Test reductions inside subroutines
+
+  s1 = 0
+  s2 = 0
+  call redsub (s1, s2, n)
+
+  if (acc_get_device_type () .eq. acc_device_nvidia) then
+     if (s1 .ne. n) call abort
+  else
+     if (s2 .ne. 1) call abort
+  end if
+end program reduction
+
+subroutine redsub(s1, s2, n)
+  implicit none
+  integer :: s1, s2, n
+
+  !$acc parallel reduction(+:s1,s2) num_gangs (10)  copy(s1)
+  s1 = s1 + 1
+  s2 = s2 + 1
+  !$acc end parallel
+end subroutine redsub
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90 b/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
new file mode 100644
index 00000000000..63bde44100d
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-fortran/pr70289.f90
@@ -0,0 +1,20 @@
+program foo
+  implicit none
+  integer :: i
+  integer :: temp = 0
+  integer :: temp2 = 0
+
+  !$acc parallel
+  !$acc loop gang private(temp)
+  do i=1, 10000
+     temp = 0
+  enddo
+  !$acc end parallel
+
+  !$acc parallel reduction(+:temp2)
+  !$acc loop gang reduction(+:temp2)
+  do i=1, 10000
+     temp2 = 0
+  enddo
+  !$acc end parallel
+end program foo
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
index db0a52d6a49..e51509f3397 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-1.f90
@@ -1,28 +1,55 @@
 ! { dg-do run }
+! { dg-additional-options "-w" }
 
 ! Integer reductions
 
 program reduction_1
   implicit none
 
-  integer, parameter    :: n = 10, vl = 32
-  integer               :: i, vresult, result
-  logical               :: lresult, lvresult
+  integer, parameter    :: n = 10, ng = 8, nw = 4, vl = 32
+  integer               :: i, vresult, rg, rw, rv, rc
+  logical               :: lrg, lrw, lrv, lrc, lvresult
   integer, dimension (n) :: array
 
   do i = 1, n
      array(i) = i
   end do
 
-  result = 0
+  !
+  ! '+' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! '+' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(+:rg) gang
+  do i = 1, n
+     rg = rg + array(i)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(+:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(+:rw) worker
   do i = 1, n
-     result = result + array(i)
+     rw = rw + array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(+:rv) vector
+  do i = 1, n
+     rv = rv + array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(+:rc) gang worker vector
+  do i = 1, n
+     rc = rc + array(i)
   end do
   !$acc end parallel
 
@@ -31,17 +58,46 @@ program reduction_1
      vresult = vresult + array(i)
   end do
 
-  if (result.ne.vresult) call abort
-
-  result = 0
-  vresult = 0
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 
+  !
   ! '*' reductions
+  !
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(*:result)
+  rg = 1
+  rw = 1
+  rv = 1
+  rc = 1
+  vresult = 1
+
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(*:rg) gang
   do i = 1, n
-     result = result * array(i)
+     rg = rg * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(*:rw) worker
+  do i = 1, n
+     rw = rw * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(*:rv) vector
+  do i = 1, n
+     rv = rv * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(*:rc) gang worker vector
+  do i = 1, n
+     rc = rc * array(i)
   end do
   !$acc end parallel
 
@@ -50,17 +106,46 @@ program reduction_1
      vresult = vresult * array(i)
   end do
 
-  if (result.ne.vresult) call abort
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
+
+  !
+  ! 'max' reductions
+  !
 
-  result = 0
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! 'max' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(max:rg) gang
+  do i = 1, n
+     rg = max (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(max:rw) worker
+  do i = 1, n
+     rw = max (rw, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(max:rv) vector
+  do i = 1, n
+     rv = max (rv, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(max:result)
+  !$acc parallel num_gangs(ng) Num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(max:rc) gang worker vector
   do i = 1, n
-     result = max (result, array(i))
+     rc = max (rc, array(i))
   end do
   !$acc end parallel
 
@@ -69,17 +154,46 @@ program reduction_1
      vresult = max (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
-
-  result = 1
-  vresult = 1
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 
+  !
   ! 'min' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
+  vresult = 0
+
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(min:rg) gang
+  do i = 1, n
+     rg = min (rg, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(min:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(min:rw) worker
   do i = 1, n
-     result = min (result, array(i))
+     rw = min (rw, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(min:rv) vector
+  do i = 1, n
+     rv = min (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(min:rc) gang worker vector
+  do i = 1, n
+     rc = min (rc, array(i))
   end do
   !$acc end parallel
 
@@ -88,17 +202,46 @@ program reduction_1
      vresult = min (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
+
+  !
+  ! 'iand' reductions
+  !
 
-  result = 1
+  rg = 1
+  rw = 1
+  rv = 1
+  rc = 1
   vresult = 1
 
-  ! 'iand' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(iand:rg) gang
+  do i = 1, n
+     rg = iand (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(iand:rw) worker
+  do i = 1, n
+     rw = iand (rw, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(iand:rv) vector
+  do i = 1, n
+     rv = iand (rv, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(iand:result)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(iand:rc) gang worker vector
   do i = 1, n
-     result = iand (result, array(i))
+     rc = iand (rc, array(i))
   end do
   !$acc end parallel
 
@@ -107,17 +250,46 @@ program reduction_1
      vresult = iand (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
-
-  result = 1
-  vresult = 1
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 
+  !
   ! 'ior' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
+  vresult = 0
+
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(ior:rg) gang
+  do i = 1, n
+     rg = ior (rg, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(ior:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(ior:rw) worker
   do i = 1, n
-     result = ior (result, array(i))
+     rw = ior (rw, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(ior:rv) gang
+  do i = 1, n
+     rv = ior (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(ior:rc) gang worker vector
+  do i = 1, n
+     rc = ior (rc, array(i))
   end do
   !$acc end parallel
 
@@ -126,17 +298,46 @@ program reduction_1
      vresult = ior (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 
-  result = 0
+  !
+  ! 'ieor' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! 'ieor' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(ieor:rg) gang
+  do i = 1, n
+     rg = ieor (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(ieor:rw) worker
+  do i = 1, n
+     rw = ieor (rw, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(ieor:result)
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(ieor:rv) vector
   do i = 1, n
-     result = ieor (result, array(i))
+     rv = ieor (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(ieor:rc) gang worker vector
+  do i = 1, n
+     rc = ieor (rc, array(i))
   end do
   !$acc end parallel
 
@@ -145,17 +346,46 @@ program reduction_1
      vresult = ieor (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 
+  !
   ! '.and.' reductions
+  !
+
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.and.:lrg) gang
+  do i = 1, n
+     lrg = lrg .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.and.:lrw) worker
+  do i = 1, n
+     lrw = lrw .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.and.:lrv) vector
+  do i = 1, n
+     lrv = lrv .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.and.:lresult)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.and.:lrc) gang worker vector
   do i = 1, n
-     lresult = lresult .and. (array(i) .ge. 5)
+     lrc = lrc .and. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -164,17 +394,46 @@ program reduction_1
      lvresult = lvresult .and. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
+
+  !
+  ! '.or.' reductions
+  !
 
-  lresult = .false.
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
   lvresult = .false.
 
-  ! '.or.' reductions
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.or.:lrg) gang
+  do i = 1, n
+     lrg = lrg .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.or.:lrw) worker
+  do i = 1, n
+     lrw = lrw .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.or.:lrv) vector
+  do i = 1, n
+     lrv = lrv .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.or.:lresult)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.or.:lrc) gang worker vector
   do i = 1, n
-     lresult = lresult .or. (array(i) .ge. 5)
+     lrc = lrc .or. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -183,17 +442,46 @@ program reduction_1
      lvresult = lvresult .or. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 
+  !
   ! '.eqv.' reductions
+  !
+
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.eqv.:lrg) gang
+  do i = 1, n
+     lrg = lrg .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.eqv.:lrw) worker
+  do i = 1, n
+     lrw = lrw .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.eqv.:lrv) vector
+  do i = 1, n
+     lrv = lrv .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.eqv.:lresult)
+  !$acc parallel num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.eqv.:lrc) gang worker vector
   do i = 1, n
-     lresult = lresult .eqv. (array(i) .ge. 5)
+     lrc = lrc .eqv. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -202,17 +490,46 @@ program reduction_1
      lvresult = lvresult .eqv. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 
+  !
   ! '.neqv.' reductions
+  !
+
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.neqv.:lrg) gang
+  do i = 1, n
+     lrg = lrg .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.neqv.:lrw) worker
+  do i = 1, n
+     lrw = lrw .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.neqv.:lrv) vector
+  do i = 1, n
+     lrv = lrv .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.neqv.:lresult)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.neqv.:lrc) gang worker vector
   do i = 1, n
-     lresult = lresult .neqv. (array(i) .ge. 5)
+     lrc = lrc .neqv. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -221,5 +538,8 @@ program reduction_1
      lvresult = lvresult .neqv. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 end program reduction_1
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
index 96955ce71ba..b828feb60de 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-2.f90
@@ -5,26 +5,52 @@
 program reduction_2
   implicit none
 
-  integer, parameter    :: n = 10, vl = 32
+  integer, parameter    :: n = 10, ng = 8, nw = 4, vl = 32
   integer               :: i
-  real, parameter       :: e = .001
-  real                  :: vresult, result
-  logical               :: lresult, lvresult
-  real, dimension (n) :: array
+  real                  :: vresult, rg, rw, rv, rc
+  real, parameter       :: e = 0.001
+  logical               :: lrg, lrw, lrv, lrc, lvresult
+  real, dimension (n)   :: array
 
   do i = 1, n
      array(i) = i
   end do
 
-  result = 0
+  !
+  ! '+' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! '+' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(+:rg) gang
+  do i = 1, n
+     rg = rg + array(i)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(+:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(+:rw) worker
   do i = 1, n
-     result = result + array(i)
+     rw = rw + array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(+:rv) vector
+  do i = 1, n
+     rv = rv + array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(+:rc) gang worker vector
+  do i = 1, n
+     rc = rc + array(i)
   end do
   !$acc end parallel
 
@@ -33,17 +59,46 @@ program reduction_2
      vresult = vresult + array(i)
   end do
 
-  if (abs (result - vresult) .ge. e) call abort
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
+
+  !
+  ! '*' reductions
+  !
 
-  result = 1
+  rg = 1
+  rw = 1
+  rv = 1
+  rc = 1
   vresult = 1
 
-  ! '*' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(*:rg) gang
+  do i = 1, n
+     rg = rg * array(i)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(*:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(*:rw) worker
   do i = 1, n
-     result = result * array(i)
+     rw = rw * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(*:rv) vector
+  do i = 1, n
+     rv = rv * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(*:rc) gang worker vector
+  do i = 1, n
+     rc = rc * array(i)
   end do
   !$acc end parallel
 
@@ -52,17 +107,46 @@ program reduction_2
      vresult = vresult * array(i)
   end do
 
-  if (result.ne.vresult) call abort
+  if (abs (rg - vresult) .ge. e) call abort
+  if (abs (rw - vresult) .ge. e) call abort
+  if (abs (rv - vresult) .ge. e) call abort
+  if (abs (rc - vresult) .ge. e) call abort
+
+  !
+  ! 'max' reductions
+  !
 
-  result = 0
+  rg = 0
+  rw = 0
+  rg = 0
+  rc = 0
   vresult = 0
 
-  ! 'max' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(max:rg) gang
+  do i = 1, n
+     rg = max (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(max:rw) worker
+  do i = 1, n
+     rw = max (rw, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(max:result)
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(max:rv) vector
   do i = 1, n
-     result = max (result, array(i))
+     rv = max (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(max:rc) gang worker vector
+  do i = 1, n
+     rc = max (rc, array(i))
   end do
   !$acc end parallel
 
@@ -71,17 +155,46 @@ program reduction_2
      vresult = max (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
-
-  result = 1
-  vresult = 1
+  if (abs (rg - vresult) .ge. e) call abort
+  if (abs (rw - vresult) .ge. e) call abort
+  if (abs (rg - vresult) .ge. e) call abort
+  if (abs (rc - vresult) .ge. e) call abort
 
+  !
   ! 'min' reductions
+  !
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(min:result)
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
+  vresult = 0
+
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(min:rg) gang
+  do i = 1, n
+     rg = min (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(min:rw) worker
+  do i = 1, n
+     rw = min (rw, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(min:rv) vector
   do i = 1, n
-     result = min (result, array(i))
+     rv = min (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(min:rc) gang worker vector
+  do i = 1, n
+     rc = min (rc, array(i))
   end do
   !$acc end parallel
 
@@ -90,17 +203,46 @@ program reduction_2
      vresult = min (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
+  if (rg .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
+
+  !
+  ! '.and.' reductions
+  !
 
-  lresult = .true.
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
   lvresult = .true.
 
-  ! '.and.' reductions
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.and.:lrg) gang
+  do i = 1, n
+     lrg = lrg .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.and.:lresult)
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.and.:lrw) worker
   do i = 1, n
-     lresult = lresult .and. (array(i) .ge. 5)
+     lrw = lrw .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.and.:lrv) vector
+  do i = 1, n
+     lrv = lrv .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.and.:lrc) gang worker vector
+  do i = 1, n
+     lrc = lrc .and. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -109,17 +251,46 @@ program reduction_2
      lvresult = lvresult .and. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
+
+  !
+  ! '.or.' reductions
+  !
 
-  lresult = .false.
+  lrg = .false.
+  lrw = .false.
+  lrv = .false.
+  lrc = .false.
   lvresult = .false.
 
-  ! '.or.' reductions
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.or.:lrg) gang
+  do i = 1, n
+     lrg = lrg .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.or.:lrw) worker
+  do i = 1, n
+     lrw = lrw .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.or.:lresult)
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.or.:lrv) vector
   do i = 1, n
-     lresult = lresult .or. (array(i) .ge. 5)
+     lrv = lrv .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.or.:lrc) gang worker vector
+  do i = 1, n
+     lrc = lrc .or. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -128,17 +299,46 @@ program reduction_2
      lvresult = lvresult .or. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 
+  !
   ! '.eqv.' reductions
+  !
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.eqv.:lresult)
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.eqv.:lrg) gang
+  do i = 1, n
+     lrg = lrg .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.eqv.:lrw) worker
   do i = 1, n
-     lresult = lresult .eqv. (array(i) .ge. 5)
+     lrw = lrw .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.eqv.:lrv) vector
+  do i = 1, n
+     lrv = lrv .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.eqv.:lrc) gang worker vector
+  do i = 1, n
+     lrc = lrc .eqv. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -147,17 +347,46 @@ program reduction_2
      lvresult = lvresult .eqv. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 
+  !
   ! '.neqv.' reductions
+  !
+
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.neqv.:lrg) gang
+  do i = 1, n
+     lrg = lrg .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.neqv.:lrw) worker
+  do i = 1, n
+     lrw = lrw .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.neqv.:lrv) vector
+  do i = 1, n
+     lrv = lrv .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.neqv.:lresult)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.neqv.:lrc) gang worker vector
   do i = 1, n
-     lresult = lresult .neqv. (array(i) .ge. 5)
+     lrc = lrc .neqv. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -166,5 +395,8 @@ program reduction_2
      lvresult = lvresult .neqv. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 end program reduction_2
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
index ecf7fbea3b8..3d8d753cfed 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-3.f90
@@ -5,26 +5,52 @@
 program reduction_3
   implicit none
 
-  integer, parameter    :: n = 10, vl = 32
+  integer, parameter    :: n = 10, ng = 8, nw = 4, vl = 32
   integer               :: i
-  double precision, parameter :: e = .001
-  double precision      :: vresult, result
-  logical               :: lresult, lvresult
+  double precision      :: vresult, rg, rw, rv, rc
+  double precision, parameter :: e = 0.001
+  logical               :: lrg, lrw, lrv, lrc, lvresult
   double precision, dimension (n) :: array
 
   do i = 1, n
      array(i) = i
   end do
 
-  result = 0
+  !
+  ! '+' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! '+' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(+:rg) gang
+  do i = 1, n
+     rg = rg + array(i)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(+:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(+:rw) worker
   do i = 1, n
-     result = result + array(i)
+     rw = rw + array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(+:rv) vector
+  do i = 1, n
+     rv = rv + array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(+:rc) gang worker vector
+  do i = 1, n
+     rc = rc + array(i)
   end do
   !$acc end parallel
 
@@ -33,17 +59,46 @@ program reduction_3
      vresult = vresult + array(i)
   end do
 
-  if (abs (result - vresult) .ge. e) call abort
+  if (abs (rg - vresult) .ge. e) call abort
+  if (abs (rw - vresult) .ge. e) call abort
+  if (abs (rv - vresult) .ge. e) call abort
+  if (abs (rc - vresult) .ge. e) call abort
+
+  !
+  ! '*' reductions
+  !
 
-  result = 1
+  rg = 1
+  rw = 1
+  rv = 1
+  rc = 1
   vresult = 1
 
-  ! '*' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(*:rg) gang
+  do i = 1, n
+     rg = rg * array(i)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(*:result)
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(*:rw) worker
   do i = 1, n
-     result = result * array(i)
+     rw = rw * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(*:rv) vector
+  do i = 1, n
+     rv = rv * array(i)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(*:rc) gang worker vector
+  do i = 1, n
+     rc = rc * array(i)
   end do
   !$acc end parallel
 
@@ -52,17 +107,46 @@ program reduction_3
      vresult = vresult * array(i)
   end do
 
-  if (result.ne.vresult) call abort
+  if (abs (rg - vresult) .ge. e) call abort
+  if (abs (rw - vresult) .ge. e) call abort
+  if (abs (rv - vresult) .ge. e) call abort
+  if (abs (rc - vresult) .ge. e) call abort
+
+  !
+  ! 'max' reductions
+  !
 
-  result = 0
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! 'max' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(max:rg) gang
+  do i = 1, n
+     rg = max (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(max:rw) worker
+  do i = 1, n
+     rw = max (rw, array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(max:result)
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(max:rv) vector
   do i = 1, n
-     result = max (result, array(i))
+     rv = max (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(max:rc) gang worker vector
+  do i = 1, n
+     rc = max (rc, array(i))
   end do
   !$acc end parallel
 
@@ -71,17 +155,46 @@ program reduction_3
      vresult = max (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
-
-  result = 1
-  vresult = 1
+  if (abs (rg - vresult) .ge. e) call abort
+  if (abs (rw - vresult) .ge. e) call abort
+  if (abs (rv - vresult) .ge. e) call abort
+  if (abs (rc - vresult) .ge. e) call abort
 
+  !
   ! 'min' reductions
+  !
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(min:result)
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
+  vresult = 0
+
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(min:rg) gang
+  do i = 1, n
+     rg = min (rg, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(min:rw) worker
+  do i = 1, n
+     rw = min (rw, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(min:rv) vector
   do i = 1, n
-     result = min (result, array(i))
+     rv = min (rv, array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(min:rc) gang worker vector
+  do i = 1, n
+     rc = min (rc, array(i))
   end do
   !$acc end parallel
 
@@ -90,17 +203,46 @@ program reduction_3
      vresult = min (vresult, array(i))
   end do
 
-  if (result.ne.vresult) call abort
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
+
+  !
+  ! '.and.' reductions
+  !
 
-  lresult = .true.
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
   lvresult = .true.
 
-  ! '.and.' reductions
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.and.:lrg) gang
+  do i = 1, n
+     lrg = lrg .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.and.:lresult)
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.and.:lrw) worker
   do i = 1, n
-     lresult = lresult .and. (array(i) .ge. 5)
+     lrw = lrw .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.and.:lrv) vector
+  do i = 1, n
+     lrv = lrv .and. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.and.:lrc) gang worker vector
+  do i = 1, n
+     lrc = lrc .and. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -109,17 +251,46 @@ program reduction_3
      lvresult = lvresult .and. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
+
+  !
+  ! '.or.' reductions
+  !
 
-  lresult = .false.
+  lrg = .false.
+  lrw = .false.
+  lrv = .false.
+  lrc = .false.
   lvresult = .false.
 
-  ! '.or.' reductions
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.or.:lrg) gang
+  do i = 1, n
+     lrg = lrg .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.or.:lrw) worker
+  do i = 1, n
+     lrw = lrw .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.or.:lresult)
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.or.:lrv) vector
   do i = 1, n
-     lresult = lresult .or. (array(i) .ge. 5)
+     lrv = lrv .or. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.or.:lrc) gang worker vector
+  do i = 1, n
+     lrc = lrc .or. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -128,17 +299,46 @@ program reduction_3
      lvresult = lvresult .or. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 
+  !
   ! '.eqv.' reductions
+  !
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.eqv.:lresult)
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.eqv.:lrg) gang
+  do i = 1, n
+     lrg = lrg .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.eqv.:lrw) worker
   do i = 1, n
-     lresult = lresult .eqv. (array(i) .ge. 5)
+     lrw = lrw .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.eqv.:lrv) vector
+  do i = 1, n
+     lrv = lrv .eqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.eqv.:lrc) gang worker vector
+  do i = 1, n
+     lrc = lrc .eqv. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -147,17 +347,46 @@ program reduction_3
      lvresult = lvresult .eqv. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
-
-  lresult = .false.
-  lvresult = .false.
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 
+  !
   ! '.neqv.' reductions
+  !
+
+  lrg = .true.
+  lrw = .true.
+  lrv = .true.
+  lrc = .true.
+  lvresult = .true.
+
+  !$acc parallel num_gangs(ng) copy(lrg)
+  !$acc loop reduction(.neqv.:lrg) gang
+  do i = 1, n
+     lrg = lrg .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(lrw)
+  !$acc loop reduction(.neqv.:lrw) worker
+  do i = 1, n
+     lrw = lrw .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(lrv)
+  !$acc loop reduction(.neqv.:lrv) vector
+  do i = 1, n
+     lrv = lrv .neqv. (array(i) .ge. 5)
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(lresult)
-  !$acc loop reduction(.neqv.:lresult)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(lrc)
+  !$acc loop reduction(.neqv.:lrc) gang worker vector
   do i = 1, n
-     lresult = lresult .neqv. (array(i) .ge. 5)
+     lrc = lrc .neqv. (array(i) .ge. 5)
   end do
   !$acc end parallel
 
@@ -166,5 +395,8 @@ program reduction_3
      lvresult = lvresult .neqv. (array(i) .ge. 5)
   end do
 
-  if (result.ne.vresult) call abort
+  if (lrg .neqv. lvresult) call abort
+  if (lrw .neqv. lvresult) call abort
+  if (lrv .neqv. lvresult) call abort
+  if (lrc .neqv. lvresult) call abort
 end program reduction_3
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
index 8c99fdb32bf..c3bdaf610a1 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-4.f90
@@ -5,50 +5,108 @@
 program reduction_4
   implicit none
 
-  integer, parameter    :: n = 10, vl = 32
+  integer, parameter    :: n = 10, ng = 8, nw = 4, vl = 32
   integer               :: i
-  complex               :: vresult, result
+  real                  :: vresult, rg, rw, rv, rc
   complex, dimension (n) :: array
 
   do i = 1, n
      array(i) = i
   end do
 
-  result = 0
+  !
+  ! '+' reductions
+  !
+
+  rg = 0
+  rw = 0
+  rv = 0
+  rc = 0
   vresult = 0
 
-  ! '+' reductions
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(+:rg) gang
+  do i = 1, n
+     rg = rg + REAL(array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(+:rw) worker
+  do i = 1, n
+     rw = rw + REAL(array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(+:rv) vector
+  do i = 1, n
+     rv = rv + REAL(array(i))
+  end do
+  !$acc end parallel
 
-  !$acc parallel vector_length(vl) num_gangs(1) copy(result)
-  !$acc loop reduction(+:result)
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(+:rc) gang worker vector
   do i = 1, n
-     result = result + array(i)
+     rc = rc + REAL(array(i))
   end do
   !$acc end parallel
 
   ! Verify the results
   do i = 1, n
-     vresult = vresult + array(i)
+     vresult = vresult + REAL(array(i))
   end do
 
-  if (result .ne. vresult) call abort
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 
-  result = 1
+  !
+  ! '*' reductions
+  !
+
+  rg = 1
+  rw = 1
+  rv = 1
+  rc = 1
   vresult = 1
 
-!  ! '*' reductions
-!
-!  !$acc parallel vector_length(vl)
-!  !$acc loop reduction(*:result)
-!  do i = 1, n
-!     result = result * array(i)
-!  end do
-!  !$acc end parallel
-!
-!  ! Verify the results
-!  do i = 1, n
-!     vresult = vresult * array(i)
-!  end do
-!
-!  if (result.ne.vresult) call abort
+  !$acc parallel num_gangs(ng) copy(rg)
+  !$acc loop reduction(*:rg) gang
+  do i = 1, n
+     rg = rg * REAL(array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_workers(nw) copy(rw)
+  !$acc loop reduction(*:rw) worker
+  do i = 1, n
+     rw = rw * REAL(array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length(vl) copy(rv)
+  !$acc loop reduction(*:rv) vector
+  do i = 1, n
+     rv = rv * REAL(array(i))
+  end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(ng) num_workers(nw) vector_length(vl) copy(rc)
+  !$acc loop reduction(*:rc) gang worker vector
+  do i = 1, n
+     rc = rc * REAL(array(i))
+  end do
+  !$acc end parallel
+
+  ! Verify the results
+  do i = 1, n
+     vresult = vresult * REAL(array(i))
+  end do
+
+  if (rg .ne. vresult) call abort
+  if (rw .ne. vresult) call abort
+  if (rv .ne. vresult) call abort
+  if (rc .ne. vresult) call abort
 end program reduction_4
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
index ec13e4e6c07..42106480c81 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-5.f90
@@ -1,12 +1,17 @@
 ! { dg-do run }
+! { dg-additional-options "-w" }
 
 ! subroutine reduction
 
 program reduction
   integer, parameter    :: n = 40, c = 10
-  integer               :: i, vsum, sum
+  integer               :: i, vsum, gs, ws, vs, cs, ns
 
-  call redsub (sum, n, c)
+  call redsub_gang (gs, n, c)
+  call redsub_worker (ws, n, c)
+  call redsub_vector (vs, n, c)
+  call redsub_combined (cs, n, c)
+  call redsub_nested (ns, n, c)
 
   vsum = 0
 
@@ -15,21 +20,80 @@ program reduction
      vsum = vsum + c
   end do
 
-  if (sum.ne.vsum) call abort ()
+  if (gs .ne. vsum) call abort ()
+  if (ws .ne. vsum) call abort ()
+  if (vs .ne. vsum) call abort ()
+  if (cs .ne. vsum) call abort ()
+  if (ns .ne. vsum) call abort ()
 end program reduction
 
-subroutine redsub(sum, n, c)
+subroutine redsub_gang(sum, n, c)
   integer :: sum, n, c
 
-  integer :: s
-  s = 0
+  sum = 0
 
-  !$acc parallel vector_length(32) copyin (n, c) copy (s) num_gangs(1)
-  !$acc loop reduction(+:s)
+  !$acc parallel copyin (n, c) num_gangs(n) copy(sum)
+  !$acc loop reduction(+:sum) gang
   do i = 1, n
-     s = s + c
+     sum = sum + c
   end do
   !$acc end parallel
+end subroutine redsub_gang
 
-  sum = s
-end subroutine redsub
+subroutine redsub_worker(sum, n, c)
+  integer :: sum, n, c
+
+  sum = 0
+
+  !$acc parallel copyin (n, c) num_workers(4) vector_length (32) copy(sum)
+  !$acc loop reduction(+:sum) worker
+  do i = 1, n
+     sum = sum + c
+  end do
+  !$acc end parallel
+end subroutine redsub_worker
+
+subroutine redsub_vector(sum, n, c)
+  integer :: sum, n, c
+
+  sum = 0
+
+  !$acc parallel copyin (n, c) vector_length(32) copy(sum)
+  !$acc loop reduction(+:sum) vector
+  do i = 1, n
+     sum = sum + c
+  end do
+  !$acc end parallel
+end subroutine redsub_vector
+
+subroutine redsub_combined(sum, n, c)
+  integer :: sum, n, c
+
+  sum = 0
+
+  !$acc parallel num_gangs (8) num_workers (4) vector_length(32) copy(sum)
+  !$acc loop reduction(+:sum) gang worker vector
+  do i = 1, n
+     sum = sum + c
+  end do
+  !$acc end parallel
+end subroutine redsub_combined
+
+subroutine redsub_nested(sum, n, c)
+  integer :: sum, n, c
+  integer :: ii, jj
+
+  ii = n / 10;
+  jj = 10;
+  sum = 0
+
+  !$acc parallel num_gangs (8) copy(sum)
+  !$acc loop reduction(+:sum) gang
+  do i = 1, ii
+     !$acc loop reduction(+:sum) vector
+     do j = 1, jj
+        sum = sum + c
+     end do
+  end do
+  !$acc end parallel
+end subroutine redsub_nested
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
index 2ff6f5fd17d..f3ed27527f5 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-6.f90
@@ -1,30 +1,94 @@
 ! { dg-do run }
+! { dg-additional-options "-cpp -w" }
 
 program reduction
   implicit none
 
-  integer, parameter    :: n = 100
-  integer               :: i, s1, s2, vs1, vs2
+  integer, parameter    :: n = 100, n2 = 1000, chunksize = 10
+  integer               :: i, gs1, gs2, ws1, ws2, vs1, vs2, cs1, cs2, hs1, hs2
+  integer               :: j, red, vred
 
-  s1 = 0
-  s2 = 0
+  gs1 = 0
+  gs2 = 0
+  ws1 = 0
+  ws2 = 0
   vs1 = 0
   vs2 = 0
+  cs1 = 0
+  cs2 = 0
+  hs1 = 0
+  hs2 = 0
 
-  !$acc parallel vector_length (32) copy(s1, s2)
-  !$acc loop reduction(+:s1, s2)
+  !$acc parallel num_gangs (1000) copy(gs1, gs2)
+  !$acc loop reduction(+:gs1, gs2) gang
   do i = 1, n
-     s1 = s1 + 1
-     s2 = s2 + 2
+     gs1 = gs1 + 1
+     gs2 = gs2 + 2
   end do
   !$acc end parallel
 
-  ! Verify the results
+  !$acc parallel num_workers (4) vector_length (32) copy(ws1, ws2)
+  !$acc loop reduction(+:ws1, ws2) worker
+  do i = 1, n
+     ws1 = ws1 + 1
+     ws2 = ws2 + 2
+  end do
+  !$acc end parallel
+
+  !$acc parallel vector_length (32) copy(vs1, vs2)
+  !$acc loop reduction(+:vs1, vs2) vector
   do i = 1, n
      vs1 = vs1 + 1
      vs2 = vs2 + 2
   end do
+  !$acc end parallel
+
+  !$acc parallel num_gangs(8) num_workers(4) vector_length(32) copy(cs1, cs2)
+  !$acc loop reduction(+:cs1, cs2) gang worker vector
+  do i = 1, n
+     cs1 = cs1 + 1
+     cs2 = cs2 + 2
+  end do
+  !$acc end parallel
+
+  ! Verify the results on the host
+  do i = 1, n
+     hs1 = hs1 + 1
+     hs2 = hs2 + 2
+  end do
+
+  if (gs1 .ne. hs1) call abort ()
+  if (gs2 .ne. hs2) call abort ()
+
+  if (ws1 .ne. hs1) call abort ()
+  if (ws2 .ne. hs2) call abort ()
+
+  if (vs1 .ne. hs1) call abort ()
+  if (vs2 .ne. hs2) call abort ()
+
+  if (cs1 .ne. hs1) call abort ()
+  if (cs2 .ne. hs2) call abort ()
+
+  ! Nested reductions.
+
+  red = 0
+  vred = 0
+
+  !$acc parallel num_gangs(10) vector_length(32) copy(red)
+  !$acc loop reduction(+:red) gang
+  do i = 1, n/chunksize
+     !$acc loop reduction(+:red) vector
+     do j = 1, chunksize
+        red = red + chunksize
+     end do
+  end do
+  !$acc end parallel
+
+  do i = 1, n/chunksize
+     do j = 1, chunksize
+        vred = vred + chunksize
+     end do
+  end do
 
-  if (s1.ne.vs1) call abort ()
-  if (s2.ne.vs2) call abort ()
+  if (red .ne. vred) call abort ()
 end program reduction
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90 b/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
new file mode 100644
index 00000000000..8ec36adf1e3
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-fortran/reduction-7.f90
@@ -0,0 +1,88 @@
+! { dg-do run }
+! { dg-additional-options "-w" }
+
+! subroutine reduction with private and firstprivate variables
+
+program reduction
+  integer, parameter    :: n = 100
+  integer               :: i, j, vsum, cs, arr(n)
+
+  call redsub_private (cs, n, arr)
+  call redsub_bogus (cs, n)
+  call redsub_combined (cs, n, arr)
+
+  vsum = 0
+
+  ! Verify the results
+  do i = 1, n
+     vsum = i
+     do j = 1, n
+        vsum = vsum + 1;
+     end do
+     if (vsum .ne. arr(i)) call abort ()
+  end do
+end program reduction
+
+! This subroutine tests a reduction with an explicit private variable.
+
+subroutine redsub_private(sum, n, arr)
+  integer :: sum, n, arr(n)
+  integer :: i, j, v
+
+  !$acc parallel copyout (arr)
+  !$acc loop gang private (v)
+  do j = 1, n
+     v = j
+
+     !$acc loop vector reduction (+:v)
+     do i = 1, 100
+        v = v + 1
+     end do
+
+     arr(j) = v
+  end do
+  !$acc end parallel
+
+  ! verify the results
+  do i = 1, 10
+     if (arr(i) .ne. 100+i) call abort ()
+  end do
+end subroutine redsub_private
+
+
+! Bogus reduction on an impliclitly firstprivate variable.  The results do
+! survive the parallel region.  The goal here is to ensure that gfortran
+! doesn't ICE.
+
+subroutine redsub_bogus(sum, n)
+  integer :: sum, n, arr(n)
+  integer :: i
+
+  !$acc parallel
+  !$acc loop gang worker vector reduction (+:sum)
+  do i = 1, n
+     sum = sum + 1
+  end do
+  !$acc end parallel
+end subroutine redsub_bogus
+
+! This reduction involving a firstprivate variable yields legitimate results.
+
+subroutine redsub_combined(sum, n, arr)
+  integer :: sum, n, arr(n)
+  integer :: i, j
+
+  !$acc parallel copy (arr)
+  !$acc loop gang
+  do i = 1, n
+     sum = i;
+
+     !$acc loop reduction(+:sum)
+     do j = 1, n
+        sum = sum + 1
+     end do
+
+     arr(i) = sum
+  end do
+  !$acc end parallel
+end subroutine redsub_combined