xref: /llvm-project/flang/test/Lower/OpenACC/acc-atomic-read.f90 (revision a63f915771ea89651a53584e483b3c5d9e73bd27) 
1! RUN: bbc -fopenacc -emit-hlfir %s -o - | FileCheck %s
2
3! This test checks the lowering of atomic read
4
5program acc_atomic_test
6  real g, h
7  !$acc atomic read
8     g = h
9end program acc_atomic_test
10
11! CHECK: func @_QQmain() attributes {fir.bindc_name = "acc_atomic_test"} {
12! CHECK: %[[VAR_G:.*]] = fir.alloca f32 {bindc_name = "g", uniq_name = "_QFEg"}
13! CHECK: %[[G_DECL:.*]]:2 = hlfir.declare %[[VAR_G]] {uniq_name = "_QFEg"} : (!fir.ref<f32>) -> (!fir.ref<f32>, !fir.ref<f32>)
14! CHECK: %[[VAR_H:.*]] = fir.alloca f32 {bindc_name = "h", uniq_name = "_QFEh"}
15! CHECK: %[[H_DECL:.*]]:2 = hlfir.declare %[[VAR_H]] {uniq_name = "_QFEh"} : (!fir.ref<f32>) -> (!fir.ref<f32>, !fir.ref<f32>)
16! CHECK: acc.atomic.read %[[G_DECL]]#1 = %[[H_DECL]]#1 : !fir.ref<f32>, !fir.ref<f32>, f32
17! CHECK: return
18! CHECK: }
19
20! Test lowering atomic read for pointer variables.
21! Please notice to use %[[VAL_4]] and %[[VAL_1]] for operands of atomic
22! operation, instead of %[[VAL_3]] and %[[VAL_0]].
23
24subroutine atomic_read_pointer()
25  integer, pointer :: x, y
26
27  !$acc atomic read
28    y = x
29
30  x = y
31end
32
33! CHECK-LABEL: func.func @_QPatomic_read_pointer() {
34! CHECK:   %[[X:.*]] = fir.alloca !fir.box<!fir.ptr<i32>> {bindc_name = "x", uniq_name = "_QFatomic_read_pointerEx"}
35! CHECK:   %[[X_DECL:.*]]:2 = hlfir.declare %[[X]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFatomic_read_pointerEx"} : (!fir.ref<!fir.box<!fir.ptr<i32>>>) -> (!fir.ref<!fir.box<!fir.ptr<i32>>>, !fir.ref<!fir.box<!fir.ptr<i32>>>)
36! CHECK:   %[[Y:.*]] = fir.alloca !fir.box<!fir.ptr<i32>> {bindc_name = "y", uniq_name = "_QFatomic_read_pointerEy"}
37! CHECK:   %[[Y_DECL:.*]]:2 = hlfir.declare %[[Y]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFatomic_read_pointerEy"} : (!fir.ref<!fir.box<!fir.ptr<i32>>>) -> (!fir.ref<!fir.box<!fir.ptr<i32>>>, !fir.ref<!fir.box<!fir.ptr<i32>>>)
38! CHECK:   %[[LOAD_X:.*]] = fir.load %[[X_DECL]]#0 : !fir.ref<!fir.box<!fir.ptr<i32>>>
39! CHECK:   %[[BOX_ADDR_X:.*]] = fir.box_addr %[[LOAD_X]] : (!fir.box<!fir.ptr<i32>>) -> !fir.ptr<i32>
40! CHECK:   %[[LOAD_Y:.*]] = fir.load %[[Y_DECL]]#0 : !fir.ref<!fir.box<!fir.ptr<i32>>>
41! CHECK:   %[[BOX_ADDR_Y:.*]] = fir.box_addr %[[LOAD_Y]] : (!fir.box<!fir.ptr<i32>>) -> !fir.ptr<i32>
42! CHECK:   acc.atomic.read %[[BOX_ADDR_Y]] = %[[BOX_ADDR_X]] : !fir.ptr<i32>, !fir.ptr<i32>, i32
43! CHECK: }
44
45subroutine atomic_read_with_cast()
46  integer(4) :: x
47  integer(8) :: y
48
49  !$acc atomic read
50  y = x
51end
52
53! CHECK-LABEL: func.func @_QPatomic_read_with_cast() {
54! CHECK: %[[X:.*]] = fir.alloca i32 {bindc_name = "x", uniq_name = "_QFatomic_read_with_castEx"}
55! CHECK: %[[X_DECL:.*]]:2 = hlfir.declare %[[X]] {uniq_name = "_QFatomic_read_with_castEx"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
56! CHECK: %[[Y:.*]] = fir.alloca i64 {bindc_name = "y", uniq_name = "_QFatomic_read_with_castEy"}
57! CHECK: %[[Y_DECL:.*]]:2 = hlfir.declare %[[Y]] {uniq_name = "_QFatomic_read_with_castEy"} : (!fir.ref<i64>) -> (!fir.ref<i64>, !fir.ref<i64>)
58! CHECK: acc.atomic.read %[[Y_DECL]]#1 = %[[X_DECL]]#1 : !fir.ref<i64>, !fir.ref<i32>, i32
59