xref: /llvm-project/flang/test/Lower/OpenMP/wsloop-reduction-logical-eqv-byref.f90 (revision 937cbce14c9aa956342a9c818c26a8a557802843)
1! RUN: bbc -emit-hlfir -fopenmp --force-byref-reduction %s -o - | FileCheck %s
2! RUN: %flang_fc1 -emit-hlfir -fopenmp -mmlir --force-byref-reduction %s -o - | FileCheck %s
3
4! NOTE: Assertions have been autogenerated by utils/generate-test-checks.py
5
6! CHECK-LABEL:   omp.declare_reduction @eqv_reduction : !fir.ref<!fir.logical<4>>
7! CHECK-SAME:    alloc {
8! CHECK:           %[[REF:.*]] = fir.alloca !fir.logical<4>
9! CHECK:           omp.yield(%[[REF]] : !fir.ref<!fir.logical<4>>)
10! CHECK-LABEL:   } init {
11! CHECK:         ^bb0(%[[VAL_0:.*]]: !fir.ref<!fir.logical<4>>, %[[ALLOC:.*]]: !fir.ref<!fir.logical<4>>):
12! CHECK:           %[[VAL_1:.*]] = arith.constant true
13! CHECK:           %[[VAL_2:.*]] = fir.convert %[[VAL_1]] : (i1) -> !fir.logical<4>
14! CHECK:           fir.store %[[VAL_2]] to %[[ALLOC]] : !fir.ref<!fir.logical<4>>
15! CHECK:           omp.yield(%[[ALLOC]] : !fir.ref<!fir.logical<4>>)
16
17! CHECK-LABEL:   } combiner {
18! CHECK:         ^bb0(%[[ARG0:.*]]: !fir.ref<!fir.logical<4>>, %[[ARG1:.*]]: !fir.ref<!fir.logical<4>>):
19! CHECK:           %[[LD0:.*]] = fir.load %[[ARG0]] : !fir.ref<!fir.logical<4>>
20! CHECK:           %[[LD1:.*]] = fir.load %[[ARG1]] : !fir.ref<!fir.logical<4>>
21! CHECK:           %[[VAL_2:.*]] = fir.convert %[[LD0]] : (!fir.logical<4>) -> i1
22! CHECK:           %[[VAL_3:.*]] = fir.convert %[[LD1]] : (!fir.logical<4>) -> i1
23! CHECK:           %[[RES:.*]] = arith.cmpi eq, %[[VAL_2]], %[[VAL_3]] : i1
24! CHECK:           %[[VAL_5:.*]] = fir.convert %[[RES]] : (i1) -> !fir.logical<4>
25! CHECK:           fir.store %[[VAL_5]] to %[[ARG0]] : !fir.ref<!fir.logical<4>>
26! CHECK:           omp.yield(%[[ARG0]] : !fir.ref<!fir.logical<4>>)
27! CHECK:         }
28
29! CHECK-LABEL:   func.func @_QPsimple_reduction(
30! CHECK-SAME:                                   %[[VAL_0:.*]]: !fir.ref<!fir.array<100x!fir.logical<4>>> {fir.bindc_name = "y"}) {
31! CHECK:           %[[VAL_1:.*]] = fir.alloca i32 {bindc_name = "i", uniq_name = "_QFsimple_reductionEi"}
32! CHECK:           %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] {uniq_name = "_QFsimple_reductionEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
33! CHECK:           %[[VAL_3:.*]] = fir.alloca !fir.logical<4> {bindc_name = "x", uniq_name = "_QFsimple_reductionEx"}
34! CHECK:           %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_3]] {uniq_name = "_QFsimple_reductionEx"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
35! CHECK:           %[[VAL_5:.*]] = arith.constant 100 : index
36! CHECK:           %[[VAL_6:.*]] = fir.shape %[[VAL_5]] : (index) -> !fir.shape<1>
37! CHECK:           %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_0]](%[[VAL_6]]) dummy_scope %{{[0-9]+}} {uniq_name = "_QFsimple_reductionEy"} : (!fir.ref<!fir.array<100x!fir.logical<4>>>, !fir.shape<1>, !fir.dscope) -> (!fir.ref<!fir.array<100x!fir.logical<4>>>, !fir.ref<!fir.array<100x!fir.logical<4>>>)
38! CHECK:           %[[VAL_8:.*]] = arith.constant true
39! CHECK:           %[[VAL_9:.*]] = fir.convert %[[VAL_8]] : (i1) -> !fir.logical<4>
40! CHECK:           hlfir.assign %[[VAL_9]] to %[[VAL_4]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
41! CHECK:           omp.parallel {
42! CHECK:             %[[VAL_10:.*]] = fir.alloca i32 {bindc_name = "i", pinned, {{.*}}}
43! CHECK:             %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_10]] {uniq_name = "_QFsimple_reductionEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
44! CHECK:             %[[VAL_12:.*]] = arith.constant 1 : i32
45! CHECK:             %[[VAL_13:.*]] = arith.constant 100 : i32
46! CHECK:             %[[VAL_14:.*]] = arith.constant 1 : i32
47! CHECK:             omp.wsloop reduction(byref @eqv_reduction %[[VAL_4]]#0 -> %[[VAL_15:.*]] : !fir.ref<!fir.logical<4>>) {
48! CHECK-NEXT:          omp.loop_nest (%[[VAL_16:.*]]) : i32 = (%[[VAL_12]]) to (%[[VAL_13]]) inclusive step (%[[VAL_14]]) {
49! CHECK:                 %[[VAL_17:.*]]:2 = hlfir.declare %[[VAL_15]] {uniq_name = "_QFsimple_reductionEx"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
50! CHECK:                 fir.store %[[VAL_16]] to %[[VAL_11]]#1 : !fir.ref<i32>
51! CHECK:                 %[[VAL_18:.*]] = fir.load %[[VAL_17]]#0 : !fir.ref<!fir.logical<4>>
52! CHECK:                 %[[VAL_19:.*]] = fir.load %[[VAL_11]]#0 : !fir.ref<i32>
53! CHECK:                 %[[VAL_20:.*]] = fir.convert %[[VAL_19]] : (i32) -> i64
54! CHECK:                 %[[VAL_21:.*]] = hlfir.designate %[[VAL_7]]#0 (%[[VAL_20]])  : (!fir.ref<!fir.array<100x!fir.logical<4>>>, i64) -> !fir.ref<!fir.logical<4>>
55! CHECK:                 %[[VAL_22:.*]] = fir.load %[[VAL_21]] : !fir.ref<!fir.logical<4>>
56! CHECK:                 %[[VAL_23:.*]] = fir.convert %[[VAL_18]] : (!fir.logical<4>) -> i1
57! CHECK:                 %[[VAL_24:.*]] = fir.convert %[[VAL_22]] : (!fir.logical<4>) -> i1
58! CHECK:                 %[[VAL_25:.*]] = arith.cmpi eq, %[[VAL_23]], %[[VAL_24]] : i1
59! CHECK:                 %[[VAL_26:.*]] = fir.convert %[[VAL_25]] : (i1) -> !fir.logical<4>
60! CHECK:                 hlfir.assign %[[VAL_26]] to %[[VAL_17]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
61! CHECK:                 omp.yield
62! CHECK:             omp.terminator
63! CHECK:           return
64
65subroutine simple_reduction(y)
66  logical :: x, y(100)
67  x = .true.
68  !$omp parallel
69  !$omp do reduction(.eqv.:x)
70  do i=1, 100
71    x = x .eqv. y(i)
72  end do
73  !$omp end do
74  !$omp end parallel
75end subroutine
76
77! CHECK-LABEL:   func.func @_QPsimple_reduction_switch_order(
78! CHECK-SAME:                                                %[[VAL_0:.*]]: !fir.ref<!fir.array<100x!fir.logical<4>>> {fir.bindc_name = "y"}) {
79! CHECK:           %[[VAL_1:.*]] = fir.alloca i32 {bindc_name = "i", uniq_name = "_QFsimple_reduction_switch_orderEi"}
80! CHECK:           %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] {uniq_name = "_QFsimple_reduction_switch_orderEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
81! CHECK:           %[[VAL_3:.*]] = fir.alloca !fir.logical<4> {bindc_name = "x", uniq_name = "_QFsimple_reduction_switch_orderEx"}
82! CHECK:           %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_3]] {uniq_name = "_QFsimple_reduction_switch_orderEx"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
83! CHECK:           %[[VAL_5:.*]] = arith.constant 100 : index
84! CHECK:           %[[VAL_6:.*]] = fir.shape %[[VAL_5]] : (index) -> !fir.shape<1>
85! CHECK:           %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_0]](%[[VAL_6]]) dummy_scope %{{[0-9]+}} {uniq_name = "_QFsimple_reduction_switch_orderEy"} : (!fir.ref<!fir.array<100x!fir.logical<4>>>, !fir.shape<1>, !fir.dscope) -> (!fir.ref<!fir.array<100x!fir.logical<4>>>, !fir.ref<!fir.array<100x!fir.logical<4>>>)
86! CHECK:           %[[VAL_8:.*]] = arith.constant true
87! CHECK:           %[[VAL_9:.*]] = fir.convert %[[VAL_8]] : (i1) -> !fir.logical<4>
88! CHECK:           hlfir.assign %[[VAL_9]] to %[[VAL_4]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
89! CHECK:           omp.parallel {
90! CHECK:             %[[VAL_10:.*]] = fir.alloca i32 {bindc_name = "i", pinned, {{.*}}}
91! CHECK:             %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_10]] {uniq_name = "_QFsimple_reduction_switch_orderEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
92! CHECK:             %[[VAL_12:.*]] = arith.constant 1 : i32
93! CHECK:             %[[VAL_13:.*]] = arith.constant 100 : i32
94! CHECK:             %[[VAL_14:.*]] = arith.constant 1 : i32
95! CHECK:             omp.wsloop reduction(byref @eqv_reduction %[[VAL_4]]#0 -> %[[VAL_15:.*]] : !fir.ref<!fir.logical<4>>) {
96! CHECK-NEXT:          omp.loop_nest (%[[VAL_16:.*]]) : i32 = (%[[VAL_12]]) to (%[[VAL_13]]) inclusive step (%[[VAL_14]]) {
97! CHECK:                 %[[VAL_17:.*]]:2 = hlfir.declare %[[VAL_15]] {uniq_name = "_QFsimple_reduction_switch_orderEx"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
98! CHECK:                 fir.store %[[VAL_16]] to %[[VAL_11]]#1 : !fir.ref<i32>
99! CHECK:                 %[[VAL_18:.*]] = fir.load %[[VAL_11]]#0 : !fir.ref<i32>
100! CHECK:                 %[[VAL_19:.*]] = fir.convert %[[VAL_18]] : (i32) -> i64
101! CHECK:                 %[[VAL_20:.*]] = hlfir.designate %[[VAL_7]]#0 (%[[VAL_19]])  : (!fir.ref<!fir.array<100x!fir.logical<4>>>, i64) -> !fir.ref<!fir.logical<4>>
102! CHECK:                 %[[VAL_21:.*]] = fir.load %[[VAL_20]] : !fir.ref<!fir.logical<4>>
103! CHECK:                 %[[VAL_22:.*]] = fir.load %[[VAL_17]]#0 : !fir.ref<!fir.logical<4>>
104! CHECK:                 %[[VAL_23:.*]] = fir.convert %[[VAL_21]] : (!fir.logical<4>) -> i1
105! CHECK:                 %[[VAL_24:.*]] = fir.convert %[[VAL_22]] : (!fir.logical<4>) -> i1
106! CHECK:                 %[[VAL_25:.*]] = arith.cmpi eq, %[[VAL_23]], %[[VAL_24]] : i1
107! CHECK:                 %[[VAL_26:.*]] = fir.convert %[[VAL_25]] : (i1) -> !fir.logical<4>
108! CHECK:                 hlfir.assign %[[VAL_26]] to %[[VAL_17]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
109! CHECK:                 omp.yield
110! CHECK:             omp.terminator
111! CHECK:           return
112
113subroutine simple_reduction_switch_order(y)
114  logical :: x, y(100)
115  x = .true.
116  !$omp parallel
117  !$omp do reduction(.eqv.:x)
118  do i=1, 100
119  x = y(i) .eqv. x
120  end do
121  !$omp end do
122  !$omp end parallel
123end subroutine
124
125! CHECK-LABEL:   func.func @_QPmultiple_reductions(
126! CHECK-SAME:                                      %[[VAL_0:.*]]: !fir.ref<!fir.array<100x!fir.logical<4>>> {fir.bindc_name = "w"}) {
127! CHECK:           %[[VAL_1:.*]] = fir.alloca i32 {bindc_name = "i", uniq_name = "_QFmultiple_reductionsEi"}
128! CHECK:           %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] {uniq_name = "_QFmultiple_reductionsEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
129! CHECK:           %[[VAL_3:.*]] = arith.constant 100 : index
130! CHECK:           %[[VAL_4:.*]] = fir.shape %[[VAL_3]] : (index) -> !fir.shape<1>
131! CHECK:           %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_0]](%[[VAL_4]]) dummy_scope %{{[0-9]+}} {uniq_name = "_QFmultiple_reductionsEw"} : (!fir.ref<!fir.array<100x!fir.logical<4>>>, !fir.shape<1>, !fir.dscope) -> (!fir.ref<!fir.array<100x!fir.logical<4>>>, !fir.ref<!fir.array<100x!fir.logical<4>>>)
132! CHECK:           %[[VAL_6:.*]] = fir.alloca !fir.logical<4> {bindc_name = "x", uniq_name = "_QFmultiple_reductionsEx"}
133! CHECK:           %[[VAL_7:.*]]:2 = hlfir.declare %[[VAL_6]] {uniq_name = "_QFmultiple_reductionsEx"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
134! CHECK:           %[[VAL_8:.*]] = fir.alloca !fir.logical<4> {bindc_name = "y", uniq_name = "_QFmultiple_reductionsEy"}
135! CHECK:           %[[VAL_9:.*]]:2 = hlfir.declare %[[VAL_8]] {uniq_name = "_QFmultiple_reductionsEy"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
136! CHECK:           %[[VAL_10:.*]] = fir.alloca !fir.logical<4> {bindc_name = "z", uniq_name = "_QFmultiple_reductionsEz"}
137! CHECK:           %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_10]] {uniq_name = "_QFmultiple_reductionsEz"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
138! CHECK:           %[[VAL_12:.*]] = arith.constant true
139! CHECK:           %[[VAL_13:.*]] = fir.convert %[[VAL_12]] : (i1) -> !fir.logical<4>
140! CHECK:           hlfir.assign %[[VAL_13]] to %[[VAL_7]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
141! CHECK:           %[[VAL_14:.*]] = arith.constant true
142! CHECK:           %[[VAL_15:.*]] = fir.convert %[[VAL_14]] : (i1) -> !fir.logical<4>
143! CHECK:           hlfir.assign %[[VAL_15]] to %[[VAL_9]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
144! CHECK:           %[[VAL_16:.*]] = arith.constant true
145! CHECK:           %[[VAL_17:.*]] = fir.convert %[[VAL_16]] : (i1) -> !fir.logical<4>
146! CHECK:           hlfir.assign %[[VAL_17]] to %[[VAL_11]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
147! CHECK:           omp.parallel {
148! CHECK:             %[[VAL_18:.*]] = fir.alloca i32 {bindc_name = "i", pinned, {{.*}}}
149! CHECK:             %[[VAL_19:.*]]:2 = hlfir.declare %[[VAL_18]] {uniq_name = "_QFmultiple_reductionsEi"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
150! CHECK:             %[[VAL_20:.*]] = arith.constant 1 : i32
151! CHECK:             %[[VAL_21:.*]] = arith.constant 100 : i32
152! CHECK:             %[[VAL_22:.*]] = arith.constant 1 : i32
153! CHECK:             omp.wsloop reduction(byref @eqv_reduction %[[VAL_7]]#0 -> %[[VAL_23:.*]], byref @eqv_reduction %[[VAL_9]]#0 -> %[[VAL_24:.*]], byref @eqv_reduction %[[VAL_11]]#0 -> %[[VAL_25:.*]] : !fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>) {
154! CHECK-NEXT:          omp.loop_nest (%[[VAL_26:.*]]) : i32 = (%[[VAL_20]]) to (%[[VAL_21]]) inclusive step (%[[VAL_22]]) {
155! CHECK:                 %[[VAL_27:.*]]:2 = hlfir.declare %[[VAL_23]] {uniq_name = "_QFmultiple_reductionsEx"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
156! CHECK:                 %[[VAL_28:.*]]:2 = hlfir.declare %[[VAL_24]] {uniq_name = "_QFmultiple_reductionsEy"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
157! CHECK:                 %[[VAL_29:.*]]:2 = hlfir.declare %[[VAL_25]] {uniq_name = "_QFmultiple_reductionsEz"} : (!fir.ref<!fir.logical<4>>) -> (!fir.ref<!fir.logical<4>>, !fir.ref<!fir.logical<4>>)
158! CHECK:                 fir.store %[[VAL_26]] to %[[VAL_19]]#1 : !fir.ref<i32>
159! CHECK:                 %[[VAL_30:.*]] = fir.load %[[VAL_27]]#0 : !fir.ref<!fir.logical<4>>
160! CHECK:                 %[[VAL_31:.*]] = fir.load %[[VAL_19]]#0 : !fir.ref<i32>
161! CHECK:                 %[[VAL_32:.*]] = fir.convert %[[VAL_31]] : (i32) -> i64
162! CHECK:                 %[[VAL_33:.*]] = hlfir.designate %[[VAL_5]]#0 (%[[VAL_32]])  : (!fir.ref<!fir.array<100x!fir.logical<4>>>, i64) -> !fir.ref<!fir.logical<4>>
163! CHECK:                 %[[VAL_34:.*]] = fir.load %[[VAL_33]] : !fir.ref<!fir.logical<4>>
164! CHECK:                 %[[VAL_35:.*]] = fir.convert %[[VAL_30]] : (!fir.logical<4>) -> i1
165! CHECK:                 %[[VAL_36:.*]] = fir.convert %[[VAL_34]] : (!fir.logical<4>) -> i1
166! CHECK:                 %[[VAL_37:.*]] = arith.cmpi eq, %[[VAL_35]], %[[VAL_36]] : i1
167! CHECK:                 %[[VAL_38:.*]] = fir.convert %[[VAL_37]] : (i1) -> !fir.logical<4>
168! CHECK:                 hlfir.assign %[[VAL_38]] to %[[VAL_27]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
169! CHECK:                 %[[VAL_39:.*]] = fir.load %[[VAL_28]]#0 : !fir.ref<!fir.logical<4>>
170! CHECK:                 %[[VAL_40:.*]] = fir.load %[[VAL_19]]#0 : !fir.ref<i32>
171! CHECK:                 %[[VAL_41:.*]] = fir.convert %[[VAL_40]] : (i32) -> i64
172! CHECK:                 %[[VAL_42:.*]] = hlfir.designate %[[VAL_5]]#0 (%[[VAL_41]])  : (!fir.ref<!fir.array<100x!fir.logical<4>>>, i64) -> !fir.ref<!fir.logical<4>>
173! CHECK:                 %[[VAL_43:.*]] = fir.load %[[VAL_42]] : !fir.ref<!fir.logical<4>>
174! CHECK:                 %[[VAL_44:.*]] = fir.convert %[[VAL_39]] : (!fir.logical<4>) -> i1
175! CHECK:                 %[[VAL_45:.*]] = fir.convert %[[VAL_43]] : (!fir.logical<4>) -> i1
176! CHECK:                 %[[VAL_46:.*]] = arith.cmpi eq, %[[VAL_44]], %[[VAL_45]] : i1
177! CHECK:                 %[[VAL_47:.*]] = fir.convert %[[VAL_46]] : (i1) -> !fir.logical<4>
178! CHECK:                 hlfir.assign %[[VAL_47]] to %[[VAL_28]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
179! CHECK:                 %[[VAL_48:.*]] = fir.load %[[VAL_29]]#0 : !fir.ref<!fir.logical<4>>
180! CHECK:                 %[[VAL_49:.*]] = fir.load %[[VAL_19]]#0 : !fir.ref<i32>
181! CHECK:                 %[[VAL_50:.*]] = fir.convert %[[VAL_49]] : (i32) -> i64
182! CHECK:                 %[[VAL_51:.*]] = hlfir.designate %[[VAL_5]]#0 (%[[VAL_50]])  : (!fir.ref<!fir.array<100x!fir.logical<4>>>, i64) -> !fir.ref<!fir.logical<4>>
183! CHECK:                 %[[VAL_52:.*]] = fir.load %[[VAL_51]] : !fir.ref<!fir.logical<4>>
184! CHECK:                 %[[VAL_53:.*]] = fir.convert %[[VAL_48]] : (!fir.logical<4>) -> i1
185! CHECK:                 %[[VAL_54:.*]] = fir.convert %[[VAL_52]] : (!fir.logical<4>) -> i1
186! CHECK:                 %[[VAL_55:.*]] = arith.cmpi eq, %[[VAL_53]], %[[VAL_54]] : i1
187! CHECK:                 %[[VAL_56:.*]] = fir.convert %[[VAL_55]] : (i1) -> !fir.logical<4>
188! CHECK:                 hlfir.assign %[[VAL_56]] to %[[VAL_29]]#0 : !fir.logical<4>, !fir.ref<!fir.logical<4>>
189! CHECK:                 omp.yield
190! CHECK:             omp.terminator
191! CHECK:           return
192
193subroutine multiple_reductions(w)
194  logical :: x,y,z,w(100)
195  x = .true.
196  y = .true.
197  z = .true.
198  !$omp parallel
199  !$omp do reduction(.eqv.:x,y,z)
200  do i=1, 100
201  x = x .eqv. w(i)
202  y = y .eqv. w(i)
203  z = z .eqv. w(i)
204  end do
205  !$omp end do
206  !$omp end parallel
207end subroutine
208