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! { dg-do run }
! { dg-additional-options "-fdump-tree-original" }
! { dg-require-visibility "" }
!
! Tests the fix for PR64952, in which the assignment to 'array' should
! have generated a temporary because of the references to the lhs in
! the function 'Fred'.
!
! Original report, involving function 'Nick'
! Contributed by Nick Maclaren <nmm1@cam.ac.uk> on clf
! https://groups.google.com/forum/#!topic/comp.lang.fortran/TvVY5j3GPmg
!
! Other tests are due to Mikael Morin <mikael.morin@sfr.fr>
!
MODULE M
INTEGER, PRIVATE :: i
REAL :: arraym(5) = (/ (i+0.0, i = 1,5) /)
CONTAINS
ELEMENTAL FUNCTION Bill (n, x)
REAL :: Bill
INTEGER, INTENT(IN) :: n
REAL, INTENT(IN) :: x
Bill = x+SUM(arraym(:n-1))+SUM(arraym(n+1:))
END FUNCTION Bill
ELEMENTAL FUNCTION Charles (x)
REAL :: Charles
REAL, INTENT(IN) :: x
Charles = x
END FUNCTION Charles
END MODULE M
ELEMENTAL FUNCTION Peter(n, x)
USE M
REAL :: Peter
INTEGER, INTENT(IN) :: n
REAL, INTENT(IN) :: x
Peter = Bill(n, x)
END FUNCTION Peter
PROGRAM Main
use M
INTEGER :: i, index(5) = (/ (i, i = 1,5) /)
REAL :: array(5) = (/ (i+0.0, i = 1,5) /)
INTERFACE
ELEMENTAL FUNCTION Peter(n, x)
REAL :: Peter
INTEGER, INTENT(IN) :: n
REAL, INTENT(IN) :: x
END FUNCTION Peter
END INTERFACE
PROCEDURE(Robert2), POINTER :: missme => Null()
! Original testcase
array = Nick(index,array)
If (any (array .ne. array(1))) STOP 1
array = (/ (i+0.0, i = 1,5) /)
! This should not create a temporary
array = Charles(array)
If (any (array .ne. index)) STOP 2
! { dg-final { scan-tree-dump-times "array\\\[\[^\\\]\]*\\\]\\s*=\\s*charles\\s*\\(&array\\\[\[^\\\]\]*\\\]\\);" 1 "original" } }
! Check use association of the function works correctly.
arraym = Bill(index,arraym)
if (any (arraym .ne. arraym(1))) STOP 3
! Check siblings interact correctly.
array = (/ (i+0.0, i = 1,5) /)
array = Henry(index)
if (any (array .ne. array(1))) STOP 4
array = (/ (i+0.0, i = 1,5) /)
! This should not create a temporary
array = index + Henry2(0) - array
! { dg-final { scan-tree-dump-times "array\\\[\[^\\\]\]*\\\]\\s*=\\s*\\(\\(real\\(kind=4\\)\\)\\s*index\\\[\[^\\\]\]*\\\]\\s*\\+\\s*D.\\d*\\)\\s*-\\s*array\\\[\[^\\\]\]*\\\];" 1 "original" } }
if (any (array .ne. 15.0)) STOP 5
arraym = (/ (i+0.0, i = 1,5) /)
arraym = Peter(index, arraym)
if (any (arraym .ne. 15.0)) STOP 6
array = (/ (i+0.0, i = 1,5) /)
array = Robert(index)
if (any (arraym .ne. 15.0)) STOP 7
missme => Robert2
array = (/ (i+0.0, i = 1,5) /)
array = David(index)
if (any (arraym .ne. 15.0)) STOP 8
array = (/ (i+0.0, i = 1,5) /)
array = James(index)
if (any (arraym .ne. 15.0)) STOP 9
array = (/ (i+0.0, i = 1,5) /)
array = Romeo(index)
if (any (arraym .ne. 15.0)) STOP 10
CONTAINS
ELEMENTAL FUNCTION Nick (n, x)
REAL :: Nick
INTEGER, INTENT(IN) :: n
REAL, INTENT(IN) :: x
Nick = x+SUM(array(:n-1))+SUM(array(n+1:))
END FUNCTION Nick
! Note that the inverse order of Henry and Henry2 is trivial.
! This way round, Henry2 has to be resolved before Henry can
! be marked as having an inherited external array reference.
ELEMENTAL FUNCTION Henry2 (n)
REAL :: Henry2
INTEGER, INTENT(IN) :: n
Henry2 = n + SUM(array(:n-1))+SUM(array(n+1:))
END FUNCTION Henry2
ELEMENTAL FUNCTION Henry (n)
REAL :: Henry
INTEGER, INTENT(IN) :: n
Henry = Henry2(n)
END FUNCTION Henry
PURE FUNCTION Robert2(n)
REAL :: Robert2
INTEGER, INTENT(IN) :: n
Robert2 = Henry(n)
END FUNCTION Robert2
ELEMENTAL FUNCTION Robert(n)
REAL :: Robert
INTEGER, INTENT(IN) :: n
Robert = Robert2(n)
END FUNCTION Robert
ELEMENTAL FUNCTION David (n)
REAL :: David
INTEGER, INTENT(IN) :: n
David = missme(n)
END FUNCTION David
ELEMENTAL SUBROUTINE James2 (o, i)
REAL, INTENT(OUT) :: o
INTEGER, INTENT(IN) :: i
o = Henry(i)
END SUBROUTINE James2
ELEMENTAL FUNCTION James(n)
REAL :: James
INTEGER, INTENT(IN) :: n
CALL James2(James, n)
END FUNCTION James
FUNCTION Romeo2(n)
REAL :: Romeo2
INTEGER, INTENT(in) :: n
Romeo2 = Henry(n)
END FUNCTION Romeo2
IMPURE ELEMENTAL FUNCTION Romeo(n)
REAL :: Romeo
INTEGER, INTENT(IN) :: n
Romeo = Romeo2(n)
END FUNCTION Romeo
END PROGRAM Main
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