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! { dg-do run }
! { dg-options "-fdump-tree-original" }
!
! PR fortran/35681
! Test the use of temporaries in case of elemental subroutines.
PROGRAM main
IMPLICIT NONE
INTEGER, PARAMETER :: sz = 5
INTEGER :: i
INTEGER :: a(sz) = (/ (i, i=1,sz) /)
INTEGER :: b(sz)
b = a
CALL double(a(sz-b+1), a) ! { dg-warning "might interfere with actual" }
! Don't check the result, as the above is invalid
! and might produce unexpected results (overlapping vector subscripts).
b = a
CALL double (a, a) ! same range, no temporary
IF (ANY(a /= 2*b)) CALL abort
b = a
CALL double (a+1, a) ! same range, no temporary
IF (ANY(a /= 2*b+2)) CALL abort
b = a
CALL double ((a(1:sz)), a(1:sz)) ! same range, no temporary
IF (ANY(a /= 2*b)) CALL abort
b = a
CALL double(a(1:sz-1), a(2:sz)) ! { dg-warning "might interfere with actual" }
! Don't check the result, as the above is invalid,
! and might produce unexpected results (arguments overlap).
b = a
CALL double((a(1:sz-1)), a(2:sz)) ! paren expression, temporary created
! { dg-final { scan-tree-dump-times "A\.16\\\[4\\\]" 1 "original" } }
IF (ANY(a /= (/ b(1), (2*b(i), i=1,sz-1) /))) CALL abort
b = a
CALL double(a(1:sz-1)+1, a(2:sz)) ! op expression, temporary created
! { dg-final { scan-tree-dump-times "A\.25\\\[4\\\]" 1 "original" } }
IF (ANY(a /= (/ b(1), (2*b(i)+2, i=1,sz-1) /))) CALL abort
b = a
CALL double(self(a), a) ! same range, no temporary
IF (ANY(a /= 2*b)) CALL abort
b = a
CALL double(self(a(1:sz-1)), a(2:sz)) ! function expr, temporary created
! { dg-final { scan-tree-dump-times "A\.37\\\[4\\\]" 1 "original" } }
IF (ANY(a /= (/ b(1), (2*b(i), i=1,sz-1) /))) CALL abort
CONTAINS
ELEMENTAL SUBROUTINE double(a, b)
IMPLICIT NONE
INTEGER, INTENT(IN) :: a
INTEGER, INTENT(OUT) :: b
b = 2 * a
END SUBROUTINE double
ELEMENTAL FUNCTION self(a)
IMPLICIT NONE
INTEGER, INTENT(IN) :: a
INTEGER :: self
self = a
END FUNCTION self
END PROGRAM main
! { dg-final { scan-tree-dump-times "_gfortran_internal_unpack" 3 "original" } }
! { dg-final { cleanup-tree-dump "original" } }
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