[Bug fortran/25029] Assumed size array can be associated with array pointer without upper bound of last dimension

["pault at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from pault at gcc dot gnu dot org  2006-01-07 14:14 -------
Subject: Bug 25029

Author: pault
Date: Sat Jan  7 14:14:08 2006
New Revision: 109449

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=109449
Log:
2006-01-07  Paul Thomas  <pault@gcc.gnu.org>

        PR fortran/22146
        * trans-array.c (gfc_reverse_ss): Remove static attribute.
        (gfc_walk_elemental_function_args): Replace gfc_expr * argument for
        the function call with the corresponding gfc_actual_arglist*.  Change
        code accordingly.
        (gfc_walk_function_expr): Call to gfc_walk_elemental_function_args
        now requires the actual argument list instead of the expression for
        the function call.
        * trans-array.h: Modify the prototype for
gfc_walk_elemental_function_args
        and provide a prototype for gfc_reverse_ss.
        * trans-stmt.h (gfc_trans_call): Add the scalarization code for the
case
        where an elemental subroutine has array valued actual arguments.

        PR fortran/25029
        PR fortran/21256
        PR fortran/20868
        PR fortran/20870
        * resolve.c (check_assumed_size_reference): New function to check for
upper
        bound in assumed size array references.
        (resolve_assumed_size_actual): New function to do a very restricted
scan
        of actual argument expressions of those procedures for which incomplete
        assumed size array references are not allowed.
        (resolve_function, resolve_call): Switch off assumed size checking of
        actual arguments, except for elemental procedures and intrinsic
        inquiry functions, in some circumstances.
        (resolve_variable): Call check_assumed_size_reference.

2006-01-07  Paul Thomas  <pault@gcc.gnu.org>

        PR fortran/22146
        * gfortran.dg/elemental_subroutine_1.f90: New test.
        * gfortran.dg/elemental_subroutine_2.f90: New test.

        PR fortran/25029
        PR fortran/21256
        * gfortran.dg/assumed_size_refs_1.f90: New test.

        PR fortran/20868
        PR fortran/20870
        * gfortran.dg/assumed_size_refs_2.f90: New test.
        * gfortran.dg/initialization_1.f90: Change warning message.

Added:
    trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_1.f90   (with props)
    trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_2.f90   (with props)
    trunk/gcc/testsuite/gfortran.dg/elemental_subroutine_1.f90
    trunk/gcc/testsuite/gfortran.dg/elemental_subroutine_2.f90
Modified:
    trunk/MAINTAINERS
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/resolve.c
    trunk/gcc/fortran/trans-array.c
    trunk/gcc/fortran/trans-array.h
    trunk/gcc/fortran/trans-intrinsic.c
    trunk/gcc/fortran/trans-stmt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/initialization_1.f90

Added: trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_1.f90
URL:
http://gcc.gnu.org/viewcvs/trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_1.f90?root=gcc&view=auto&rev=109449
==============================================================================
--- trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_1.f90 (added)
+++ trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_1.f90 Sat Jan  7 14:14:08
2006
@@ -1,0 +1,64 @@
+!==================assumed_size_refs_1.f90==================
+! { dg-do compile }
+! Test the fix for PR25029, PR21256 in which references to
+! assumed size arrays without an upper bound to the last
+! dimension were generating no error. The first version of
+! the patch failed in DHSEQR, as pointed out by Toon Moene
+! in http://gcc.gnu.org/ml/fortran/2005-12/msg00466.html
+!
+! Contributed by Paul Thomas  <pault@gcc.gnu.org>
+!
+program assumed_size_test_1
+  implicit none
+  real a(2, 4)
+
+  a = 1.0
+  call foo (a)
+
+contains
+  subroutine foo(m)
+    real, target :: m(1:2, *)
+    real x(2,2,2)
+    real, external :: bar
+    real, pointer :: p(:,:), q(:,:)
+    allocate (q(2,2))
+
+! PR25029
+    p => m                     ! { dg-error "upper bound in the last
dimension" }
+    q = m                      ! { dg-error "upper bound in the last
dimension" }
+
+! PR21256( and PR25060)
+    m = 1                      ! { dg-error "upper bound in the last
dimension" }
+
+    m(1,1) = 2.0
+    x = bar (m)
+    x = fcn (m)                ! { dg-error "upper bound in the last
dimension" }
+    m(:, 1:2) = fcn (q)
+    call sub (m, x)            ! { dg-error "upper bound in the last
dimension" }
+    call sub (m(1:2, 1:2), x)
+    print *, p
+
+    call DHSEQR(x)
+
+  end subroutine foo
+
+  elemental function fcn (a) result (b)
+    real, intent(in) :: a
+    real :: b
+    b = 2.0 * a
+  end function fcn
+
+  elemental subroutine sub (a, b)
+    real, intent(inout) :: a, b
+    b = 2.0 * a
+  end subroutine sub
+  
+  SUBROUTINE DHSEQR( WORK )
+    REAL WORK( * )
+    EXTERNAL           DLARFX
+    INTRINSIC          MIN
+    WORK( 1 ) = 1.0
+    CALL DLARFX( MIN( 1, 8 ), WORK )
+  END SUBROUTINE DHSEQR
+
+end program assumed_size_test_1

Propchange: trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_1.f90
            ('svn:executable' added)

Added: trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_2.f90
URL:
http://gcc.gnu.org/viewcvs/trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_2.f90?root=gcc&view=auto&rev=109449
==============================================================================
--- trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_2.f90 (added)
+++ trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_2.f90 Sat Jan  7 14:14:08
2006
@@ -1,0 +1,44 @@
+!==================assumed_size_refs_1.f90==================
+! { dg-do compile }
+! Test the fix for PR20868 & PR20870 in which references to
+! assumed size arrays without an upper bound to the last
+! dimension were generating no error.
+!
+! Contributed by Paul Thomas  <pault@gcc.gnu.org>
+!
+program assumed_size_test_2
+  implicit none
+  real a(2, 4)
+
+  a = 1.0
+  call foo (a)
+
+contains
+  subroutine foo(m)
+    real, target :: m(1:2, *)
+    real x(2,2,2)
+    real, pointer :: q(:,:)
+    integer :: i
+    allocate (q(2,2))
+
+    q = cos (1.0 + abs(m))     ! { dg-error "upper bound in the last
dimension" }
+
+    x = reshape (m, (/2,2,2/)) ! { dg-error "upper bound in the last
dimension" }
+
+! PR20868
+    print *, ubound (m)        ! { dg-error "upper bound in the last
dimension" }
+    print *, lbound (m)
+
+! PR20870
+    print *, size (m)          ! { dg-error "upper bound in the last
dimension" }
+
+! Check non-array valued intrinsics
+    print *, ubound (m, 1)
+    print *, ubound (m, 2)     ! { dg-error "not a valid dimension index" }
+    
+    i = 2
+    print *, size (m, i)
+
+  end subroutine foo
+
+end program assumed_size_test_2

Propchange: trunk/gcc/testsuite/gfortran.dg/assumed_size_refs_2.f90
            ('svn:executable' added)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25029