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1 ! { dg-options "-O3 -fdump-tree-lversion-details -fno-frontend-loop-interchange" }
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2
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3 ! We could version the loop for when the first dimension has a stride
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4 ! of 1, but at present there's no real benefit. The gimple loop
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5 ! interchange pass couldn't handle the versioned loop, and interchange
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6 ! is instead done by the frontend (but disabled by the options above).
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7
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8 subroutine f1(x)
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9 real :: x(:, :)
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10 do i = lbound(x, 1), ubound(x, 1)
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11 do j = lbound(x, 2), ubound(x, 2)
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12 x(i, j) = 100
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13 end do
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14 end do
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15 end subroutine f1
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16
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17 subroutine f2(x, n, step)
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18 integer :: n, step
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19 real :: x(100, 100)
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20 do i = 1, n
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21 do j = 1, n
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22 x(i * step, j) = 100
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23 end do
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24 end do
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25 end subroutine f2
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26
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27 subroutine f3(x, n, step)
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28 integer :: n, step
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29 real :: x(n * step, n)
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30 do i = 1, n
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31 do j = 1, n
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32 x(i * step, j) = 100
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33 end do
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34 end do
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35 end subroutine f3
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36
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37 ! { dg-final { scan-tree-dump-times {likely to be the innermost dimension} 1 "lversion" } }
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38 ! { dg-final { scan-tree-dump-not {want to version} "lversion" } }
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39 ! { dg-final { scan-tree-dump-not {versioned} "lversion" } }
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