derek.holloway
7502bf64a4
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41 lines
1.6 KiB
Fortran
41 lines
1.6 KiB
Fortran
! Test forall lowering
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! RUN: %flang_fc1 -emit-hlfir %s -o - | FileCheck %s
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!*** This FORALL construct does present a potential loop-carried dependence if
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!*** implemented naively (and incorrectly). The final value of a(3) must be the
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!*** value of a(2) before loopy begins execution added to b(2).
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subroutine test9(a,b,n)
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integer :: n
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real, intent(inout) :: a(n)
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real, intent(in) :: b(n)
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loopy: FORALL (i=1:n-1)
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a(i+1) = a(i) + b(i)
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END FORALL loopy
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end subroutine test9
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! CHECK-LABEL: func.func @_QPtest9(
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! CHECK: hlfir.forall
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! CHECK: (%[[arg3:.*]]: i32) {
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! CHECK: %[[i:.*]] = hlfir.forall_index "i" %[[arg3]] : (i32) -> !fir.ref<i32>
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! CHECK: hlfir.region_assign {
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! CHECK: %[[i_val:.*]] = fir.load %[[i]]
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! CHECK: %[[i_idx:.*]] = fir.convert %[[i_val]] : (i32) -> i64
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! CHECK: %[[a_i_ref:.*]] = hlfir.designate {{.*}} (%[[i_idx]])
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! CHECK: %[[a_i:.*]] = fir.load %[[a_i_ref]]
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! CHECK: %[[i_val2:.*]] = fir.load %[[i]]
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! CHECK: %[[i_idx2:.*]] = fir.convert %[[i_val2]] : (i32) -> i64
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! CHECK: %[[b_i_ref:.*]] = hlfir.designate {{.*}} (%[[i_idx2]])
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! CHECK: %[[b_i:.*]] = fir.load %[[b_i_ref]]
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! CHECK: %[[res:.*]] = arith.addf %[[a_i]], %[[b_i]]
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! CHECK: hlfir.yield %[[res]]
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! CHECK: } to {
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! CHECK: %[[i_val3:.*]] = fir.load %[[i]]
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! CHECK: %[[i_plus_1:.*]] = arith.addi %[[i_val3]], {{.*}}
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! CHECK: %[[i_plus_1_idx:.*]] = fir.convert %[[i_plus_1]] : (i32) -> i64
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! CHECK: %[[a_i_plus_1_ref:.*]] = hlfir.designate {{.*}} (%[[i_plus_1_idx]])
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! CHECK: hlfir.yield %[[a_i_plus_1_ref]]
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! CHECK: }
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! CHECK: }
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