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! { dg-do run }
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! { dg-do run }
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! Check the fix for PR28947, in which the mechanism for dealing
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! Check the fix for PR28947, in which the mechanism for dealing
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! with matmul (a, transpose (b)) would cause wrong results for
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! with matmul (a, transpose (b)) would cause wrong results for
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! a having a rank == 1.
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! a having a rank == 1.
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!
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!
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! Contributed by Harald Anlauf
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! Contributed by Harald Anlauf
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!
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!
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program gfcbug40
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program gfcbug40
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implicit none
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implicit none
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real :: h(3,3), mat(2,3)
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real :: h(3,3), mat(2,3)
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h(:,:) = - HUGE (1.0)/4 ! Preset unused elements suitably...
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h(:,:) = - HUGE (1.0)/4 ! Preset unused elements suitably...
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h(3,:) = 0
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h(3,:) = 0
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h(3,3) = 1
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h(3,3) = 1
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mat(:,:) = 1
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mat(:,:) = 1
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h(3,:) = h(3,:) + matmul (matmul (h(3,:), transpose (mat)), mat)
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h(3,:) = h(3,:) + matmul (matmul (h(3,:), transpose (mat)), mat)
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if (any (h(3,:) .ne. (/2.0, 2.0, 3.0/))) call abort ()
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if (any (h(3,:) .ne. (/2.0, 2.0, 3.0/))) call abort ()
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end program gfcbug40
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end program gfcbug40
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