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! RUN: %S/test_errors.sh %s %t %flang_fc1
! Test DO loop semantics for constraint C1130 --
! The constraint states that "If the locality-spec DEFAULT ( NONE ) appears in a
! DO CONCURRENT statement; a variable that is a local or construct entity of a
! scope containing the DO CONCURRENT construct; and that appears in the block of
! the construct; shall have its locality explicitly specified by that
! statement."
module m
real :: mvar
end module m
subroutine s1()
use m
integer :: i, ivar, jvar, kvar
real :: x
type point
real :: x, y
end type point
type, extends(point) :: color_point
integer :: color
end type color_point
type(point), target :: c
class(point), pointer :: p_or_c
p_or_c => c
jvar = 5
! References in this DO CONCURRENT are OK since there's no DEFAULT(NONE)
! locality-spec
associate (avar => ivar)
do concurrent (i = 1:2) shared(jvar)
ivar = 3
ivar = ivar + i
block
real :: bvar
avar = 4
x = 3.5
bvar = 3.5 + i
end block
jvar = 5
mvar = 3.5
end do
end associate
associate (avar => ivar)
!ERROR: DO CONCURRENT step expression may not be zero
do concurrent (i = 1:2:0) default(none) shared(jvar) local(kvar)
!ERROR: Variable 'ivar' from an enclosing scope referenced in DO CONCURRENT with DEFAULT(NONE) must appear in a locality-spec
ivar = &
!ERROR: Variable 'ivar' from an enclosing scope referenced in DO CONCURRENT with DEFAULT(NONE) must appear in a locality-spec
ivar + i
block
real :: bvar
!ERROR: Variable 'avar' from an enclosing scope referenced in DO CONCURRENT with DEFAULT(NONE) must appear in a locality-spec
avar = 4
!ERROR: Variable 'x' from an enclosing scope referenced in DO CONCURRENT with DEFAULT(NONE) must appear in a locality-spec
x = 3.5
bvar = 3.5 + i ! OK, bvar's scope is within the DO CONCURRENT
end block
jvar = 5 ! OK, jvar appears in a locality spec
kvar = 5 ! OK, kvar appears in a locality spec
!ERROR: Variable 'mvar' from an enclosing scope referenced in DO CONCURRENT with DEFAULT(NONE) must appear in a locality-spec
mvar = 3.5
end do
end associate
select type ( a => p_or_c )
type is ( point )
do concurrent (i=1:5) local(a)
! C1130 This is OK because there's no DEFAULT(NONE) locality spec
a%x = 3.5
end do
end select
select type ( a => p_or_c )
type is ( point )
do concurrent (i=1:5) default (none)
!ERROR: Variable 'a' from an enclosing scope referenced in DO CONCURRENT with DEFAULT(NONE) must appear in a locality-spec
a%x = 3.5
end do
end select
select type ( a => p_or_c )
type is ( point )
do concurrent (i=1:5) default (none) local(a)
! C1130 This is OK because 'a' is in a locality-spec
a%x = 3.5
end do
end select
x = 5.0 ! OK, we're not in a DO CONCURRENT
end subroutine s1
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