Fortran: fix DATA and derived types with pointer components [PR114474]

When matching actual arguments in match_actual_arg, these are initially
treated as a possible dummy procedure, assuming that the correct type is
determined later.  This resolution could fail when the procedure is a
derived type constructor with a pointer component and appears in a DATA
statement, where the pointer shall be associated with an initial data
target.  Check for those cases where the type obviously has not been
resolved yet, and which were missed because there was no component
reference.

gcc/fortran/ChangeLog:

	PR fortran/114474
	* primary.cc (gfc_variable_attr): Catch variables used in structure
	constructors within DATA statements that are still tagged with a
	temporary type BT_PROCEDURE from match_actual_arg and which have the
	target attribute, and fix their typespec.

gcc/testsuite/ChangeLog:

	PR fortran/114474
	* gfortran.dg/data_pointer_3.f90: New test.

(cherry picked from commit bbb7c513dddc5c9b2d5e9b78bc1c2f85a0cfe07e)

diff --git a/gcc/fortran/primary.cc b/gcc/fortran/primary.cc
index c6a119c73cb4979e0b95f547612898d9ed173c70..edbd162ed13bb9346b7d2fd099f1a0328653e488 100644 (file)
--- a/gcc/fortran/primary.cc
+++ b/gcc/fortran/primary.cc
@@ -2672,6 +2672,18 @@ gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts)
   if (ts != NULL && expr->ts.type == BT_UNKNOWN)
     *ts = sym->ts;
 
+  /* Catch left-overs from match_actual_arg, where an actual argument of a
+     procedure is given a temporary ts.type == BT_PROCEDURE.  The fixup is
+     needed for structure constructors in DATA statements, where a pointer
+     is associated with a data target, and the argument has not been fully
+     resolved yet.  Components references are dealt with further below.  */
+  if (ts != NULL
+      && expr->ts.type == BT_PROCEDURE
+      && expr->ref == NULL
+      && attr.flavor != FL_PROCEDURE
+      && attr.target)
+    *ts = sym->ts;
+
   has_inquiry_part = false;
   for (ref = expr->ref; ref; ref = ref->next)
     if (ref->type == REF_INQUIRY)

diff --git a/gcc/testsuite/gfortran.dg/data_pointer_3.f90 b/gcc/testsuite/gfortran.dg/data_pointer_3.f90
new file mode 100644 (file)
index 0000000..49c288e
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/data_pointer_3.f90
@@ -0,0 +1,77 @@
+! { dg-do compile }
+! PR fortran/114474 - DATA and derived types with pointer components
+
+program pr114474
+  implicit none
+  integer, target     :: ii = 42    ! initial data target
+
+  integer, target     :: jj = 24
+  integer, pointer    :: qq => jj
+  ! ii and jj resolve slightly differently when the data statement below
+  ! is reached, as jj is resolved outside the structure constructor first
+
+  type t
+     integer, pointer :: h
+  end type t
+
+  integer, target     :: kk(7) =  23
+  integer, pointer    :: ll(:) => kk
+
+  type t1
+     integer          :: m(7)
+  end type t1
+
+  type(t)             :: x1, x2, x3, x4, x5
+  type(t), parameter  :: z1 = t(null())
+
+  type(t1), target    :: tt = t1([1,2,3,4,5,6,7])
+  type(t1), parameter :: vv = t1(22)
+  type(t1)            :: w1, w2
+  integer,  pointer   :: p1(:) => tt% m
+
+  data x1 / t(null())  /
+  data x2 / t(ii)      / ! ii is initial data target
+  data x3 / t(jj)      / ! jj is resolved differently...
+  data x4 / t(tt%m(3)) / ! pointer association with 3rd element
+
+  data w1 / t1(12)     /
+  data w2 / t1(vv%m)   /
+
+  if (      associated (x1% h)) stop 1
+  if (.not. associated (x2% h)) stop 2
+  if (.not. associated (x3% h)) stop 3
+  if (.not. associated (x4% h)) stop 4
+  if (x2% h /= 42) stop 5
+  if (x3% h /= 24) stop 6
+  if (x4% h /=  3) stop 7
+ 
+  if (any (w1%m /= 12  )) stop 8
+  if (any (w2%m /= vv%m)) stop 9
+end
+
+
+subroutine sub
+  implicit none
+
+  interface
+     real function myfun (x)
+       real, intent(in) :: x
+     end function myfun
+  end interface
+
+  type u
+     procedure(myfun), pointer, nopass :: p
+  end type u
+
+  type(u)            :: u3 = u(null())
+  type(u), parameter :: u4 = u(null())
+  type(u)            :: u1, u2
+
+  data u1 / u(null()) /
+  data u2 / u(myfun)  /
+end
+
+real function myfun (x)
+  real, intent(in) :: x
+  myfun = x
+end function myfun