re PR fortran/50420 ([Coarray] lcobound doesn't accept coarray subcomponents)

	PR fortran/50420
	* trans-array.c (gfc_conv_expr_descriptor): Count codimensions starting
	from zero, and add then the relevant offset (either ndim or loop.dimen)
	depending on context.

From-SVN: r180142

gcc/fortran/ChangeLog

 2011-10-18  Mikael Morin  <mikael@gcc.gnu.org>
 
+	PR fortran/50420
+	* trans-array.c (gfc_conv_expr_descriptor): Count codimensions starting
+	from zero, and add then the relevant offset (either ndim or loop.dimen)
+	depending on context.
+
+2011-10-18  Mikael Morin  <mikael@gcc.gnu.org>
+
 	* trans-array.c (gfc_conv_expr_descriptor): Save some horizontal space.
 
 2011-10-18  Mikael Morin  <mikael@gcc.gnu.org>

gcc/fortran/trans-array.c

@@ -5981,25 +5981,24 @@ gfc_conv_expr_descriptor (gfc_se * se, gfc_expr * expr, gfc_ss * ss)
 	  gfc_array_ref *ar = &info->ref->u.ar;
 
 	  codim = gfc_get_corank (expr);
-	  for (n = ss->data.info.dimen; n < ss->data.info.dimen + codim - 1;
-	       n++)
+	  for (n = 0; n < codim - 1; n++)
 	    {
 	      /* Make sure we are not lost somehow.  */
-	      gcc_assert (ar->dimen_type[n] == DIMEN_THIS_IMAGE);
+	      gcc_assert (ar->dimen_type[n + ndim] == DIMEN_THIS_IMAGE);
 
 	      /* Make sure the call to gfc_conv_section_startstride won't
 	         generate unnecessary code to calculate stride.  */
-	      gcc_assert (ar->stride[n] == NULL);
+	      gcc_assert (ar->stride[n + ndim] == NULL);
 
-	      gfc_conv_section_startstride (&loop, ss, n);
-	      loop.from[n] = info->start[n];
-	      loop.to[n]   = info->end[n];
+	      gfc_conv_section_startstride (&loop, ss, n + ndim);
+	      loop.from[n + loop.dimen] = info->start[n + ndim];
+	      loop.to[n + loop.dimen]   = info->end[n + ndim];
 	    }
 
-	  gcc_assert (n == ss->data.info.dimen + codim - 1);
+	  gcc_assert (n == codim - 1);
 	  evaluate_bound (&loop.pre, info->start, ar->start,
-			  info->descriptor, n, true);
-	  loop.from[n] = info->start[n];
+			  info->descriptor, n + ndim, true);
+	  loop.from[n + loop.dimen] = info->start[n + ndim];
 	}
       else
 	codim = 0;