[PATCH] PR fortran/100602 - [11/12 Regression] Erroneous "pointer argument is not associated" runtime error

[Harald Anlauf via Fortran]

The generation of the new runtime check picked up the wrong attributes
in the case of CLASS array arguments.  There is related new code in
gfc_conv_procedure_call which served as reference for the fix.

Regtested on x86_64-pc-linux-gnu.

OK for mainline / 11-branch?

Thanks,
Harald


Fortran: Fix erroneous "pointer argument is not associated" runtime error

For CLASS arrays we need to use the CLASS data attributes to determine
which runtime check to generate.

gcc/fortran/ChangeLog:

        PR fortran/100602
        * trans-intrinsic.c (gfc_conv_intrinsic_size): Use CLASS data
        attributes for CLASS arrays for generation of runtime error.

gcc/testsuite/ChangeLog:

        PR fortran/100602
        * gfortran.dg/pointer_check_14.f90: New test.


diff --git a/gcc/fortran/trans-intrinsic.c b/gcc/fortran/trans-intrinsic.c
index 4d7451479d3..7ad297905b5 100644
--- a/gcc/fortran/trans-intrinsic.c
+++ b/gcc/fortran/trans-intrinsic.c
@@ -7999,7 +7999,14 @@ gfc_conv_intrinsic_size (gfc_se * se, gfc_expr * expr)
       tree temp;
       tree cond;

-      attr = sym ? sym->attr : gfc_expr_attr (e);
+      if (e->symtree->n.sym && IS_CLASS_ARRAY (e->symtree->n.sym))
+	{
+	  attr = CLASS_DATA (e->symtree->n.sym)->attr;
+	  attr.pointer = attr.class_pointer;
+	}
+      else
+	attr = gfc_expr_attr (e);
+
       if (attr.allocatable)
 	msg = xasprintf ("Allocatable argument '%s' is not allocated",
 			 e->symtree->n.sym->name);
diff --git a/gcc/testsuite/gfortran.dg/pointer_check_14.f90 b/gcc/testsuite/gfortran.dg/pointer_check_14.f90
new file mode 100644
index 00000000000..8ef6b3611fa
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pointer_check_14.f90
@@ -0,0 +1,28 @@
+! { dg-do run }
+! { dg-options "-fcheck=pointer -fdump-tree-original" }
+! PR100602 - Erroneous "pointer argument is not associated" runtime error
+
+module m
+  type :: T
+  end type
+contains
+  subroutine f(this)
+    class(T), intent(in)  :: this(:)
+    class(T), allocatable :: ca(:)
+    class(T), pointer     :: cp(:)
+    if (size (this) == 0) return
+    write(*,*) size (this)
+    stop 1
+    write(*,*) size (ca) ! Check #1
+    write(*,*) size (cp) ! Check #2
+  end subroutine f
+end module
+
+program main
+  use m
+  call f([T::])
+end program
+
+! { dg-final { scan-tree-dump-times "_gfortran_runtime_error_at" 2 "original" } }
+! { dg-final { scan-tree-dump-times "Allocatable argument .*ca" 1 "original" } }
+! { dg-final { scan-tree-dump-times "Pointer argument .*cp" 1 "original" } }