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re PR fortran/40443 (Elemental procedure in genericl interface incorrectly selected in preference to specific procedure)

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2009-06-22  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/40443
	* interface.c (gfc_search_interface): Hold back a match to an
	elementary procedure until all other possibilities are
	exhausted.

2009-06-22  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/40443
	* gfortran.dg/generic_18.f90: New test.

From-SVN: r148776
This commit is contained in:
Paul Thomas 2009-06-22 04:41:10 +00:00
parent 0e6640d89d
commit 22a0a78022
2 changed files with 66 additions and 2 deletions
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14
gcc/fortran/interface.c
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@ -2425,6 +2425,7 @@ gfc_symbol *
gfc_search_interface (gfc_interface *intr, int sub_flag,
gfc_actual_arglist **ap)
{
gfc_symbol *elem_sym = NULL;
for (; intr; intr = intr->next)
{
if (sub_flag && intr->sym->attr.function)
@ -2433,10 +2434,19 @@ gfc_search_interface (gfc_interface *intr, int sub_flag,
continue;
if (gfc_arglist_matches_symbol (ap, intr->sym))
return intr->sym;
{
/* Satisfy 12.4.4.1 such that an elemental match has lower
weight than a non-elemental match. */
if (intr->sym->attr.elemental)
{
elem_sym = intr->sym;
continue;
}
return intr->sym;
}
}
return NULL;
return elem_sym ? elem_sym : NULL;
}

54
gcc/testsuite/gfortran.dg/generic_18.f90 Normal file
View File

@ -0,0 +1,54 @@
! { dg-do compile }
! { dg-options "-fdump-tree-original" }
!
! Test the fix for PR40443 in which the final call to the generic
! 'SpecElem' was resolved to the elemental rather than the specific
! procedure, which is required by the second part of 12.4.4.1.
!
! Contributed by Ian Harvey <ian_harvey@bigpond.com>
!
MODULE SomeOptions
IMPLICIT NONE
INTERFACE ElemSpec
MODULE PROCEDURE ElemProc
MODULE PROCEDURE SpecProc
END INTERFACE ElemSpec
INTERFACE SpecElem
MODULE PROCEDURE SpecProc
MODULE PROCEDURE ElemProc
END INTERFACE SpecElem
CONTAINS
ELEMENTAL SUBROUTINE ElemProc(a)
CHARACTER, INTENT(OUT) :: a
!****
a = 'E'
END SUBROUTINE ElemProc
SUBROUTINE SpecProc(a)
CHARACTER, INTENT(OUT) :: a(:)
!****
a = 'S'
END SUBROUTINE SpecProc
END MODULE SomeOptions
PROGRAM MakeAChoice
USE SomeOptions
IMPLICIT NONE
CHARACTER scalar, array(2)
!****
CALL ElemSpec(scalar) ! Should choose the elemental (and does)
WRITE (*, 100) scalar
CALL ElemSpec(array) ! Should choose the specific (and does)
WRITE (*, 100) array
!----
CALL SpecElem(scalar) ! Should choose the elemental (and does)
WRITE (*, 100) scalar
CALL SpecElem(array) ! Should choose the specific (but didn't)
WRITE (*, 100) array
!----
100 FORMAT(A,:,', ',A)
END PROGRAM MakeAChoice
! { dg-final { scan-tree-dump-times "specproc" 3 "original" } }
! { dg-final { scan-tree-dump-times "elemproc" 3 "original" } }
! { dg-final { cleanup-tree-dump "original" } }
! { dg-final { cleanup-modules "SomeOptions" } }