diff mbox

[Fortran] CAF dep (2/3): Move code around, prepare for more locking support

Message ID 53FE4F9E.4050602@net-b.de
State New
Headers show

Commit Message

Tobias Burnus Aug. 27, 2014, 9:37 p.m. UTC 
I claim that it is part 2 of 3 of the "CAF dep" series, but the patch 
has nothing to do with it, except that it is in the way.

Technically, it just moves code from trans-intrinsic.c to trans-expr.c 
and makes it available. Additionally, I support the case "offset == 
NULL_TREE", which is supposed to be used with lock variables, where we 
know that the coarray offset is always zero. That's used by my 
incomplete local lock patch.

Build and regtested (as part of the series) on x86-64-gnu-linux.
OK for the trunk?

Tobias

Comments

Paul Richard Thomas Aug. 30, 2014, 4:09 p.m. UTC | #1 
Dear Tobias,

Obviously there is no problem with this - OK for trunk

Cheers

Paul

On 27 August 2014 23:37, Tobias Burnus <burnus@net-b.de> wrote:
> I claim that it is part 2 of 3 of the "CAF dep" series, but the patch has
> nothing to do with it, except that it is in the way.
>
> Technically, it just moves code from trans-intrinsic.c to trans-expr.c and
> makes it available. Additionally, I support the case "offset == NULL_TREE",
> which is supposed to be used with lock variables, where we know that the
> coarray offset is always zero. That's used by my incomplete local lock
> patch.
>
> Build and regtested (as part of the series) on x86-64-gnu-linux.
> OK for the trunk?
>
> Tobias
diff mbox

Patch

2014-08-27  Tobias Burnus  <burnus@net-b.de>

	* trans.h (gfc_caf_get_image_index,
	gfc_get_caf_token_offset): New prototypes.
	* trans-expr.c (gfc_caf_get_image_index): Moved from
	trans-intrinsic.c and renamed.
	(gfc_get_caf_token_offset) Ditto; support offset = NULL
	with early return.
	* trans-intrinsic.c (get_caf_token_offset, caf_get_image_index):
	Moved to trans-expr.
	(gfc_conv_intrinsic_caf_get, conv_caf_send,
	conv_intrinsic_atomic_op, conv_intrinsic_atomic_ref,
	conv_intrinsic_atomic_cas): Update callers.

diff --git a/gcc/fortran/trans-expr.c b/gcc/fortran/trans-expr.c
index 2ea09ce..f2ed474 100644
--- a/gcc/fortran/trans-expr.c
+++ b/gcc/fortran/trans-expr.c
@@ -1444,6 +1444,149 @@  gfc_get_tree_for_caf_expr (gfc_expr *expr)
 }
 
 
+/* Obtain the Coarray token - and optionally also the offset.  */
+
+void
+gfc_get_caf_token_offset (tree *token, tree *offset, tree caf_decl, tree se_expr,
+			  gfc_expr *expr)
+{
+  tree tmp;
+
+  /* Coarray token.  */
+  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (caf_decl)))
+    {
+      gcc_assert (GFC_TYPE_ARRAY_AKIND (TREE_TYPE (caf_decl))
+		    == GFC_ARRAY_ALLOCATABLE
+		  || expr->symtree->n.sym->attr.select_type_temporary);
+      *token = gfc_conv_descriptor_token (caf_decl);
+    }
+  else if (DECL_LANG_SPECIFIC (caf_decl)
+	   && GFC_DECL_TOKEN (caf_decl) != NULL_TREE)
+    *token = GFC_DECL_TOKEN (caf_decl);
+  else
+    {
+      gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (caf_decl))
+		  && GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (caf_decl)) != NULL_TREE);
+      *token = GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (caf_decl));
+    }
+
+  if (offset == NULL)
+    return;
+
+  /* Offset between the coarray base address and the address wanted.  */
+  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (caf_decl))
+      && (GFC_TYPE_ARRAY_AKIND (TREE_TYPE (caf_decl)) == GFC_ARRAY_ALLOCATABLE
+	  || GFC_TYPE_ARRAY_AKIND (TREE_TYPE (caf_decl)) == GFC_ARRAY_POINTER))
+    *offset = build_int_cst (gfc_array_index_type, 0);
+  else if (DECL_LANG_SPECIFIC (caf_decl)
+	   && GFC_DECL_CAF_OFFSET (caf_decl) != NULL_TREE)
+    *offset = GFC_DECL_CAF_OFFSET (caf_decl);
+  else if (GFC_TYPE_ARRAY_CAF_OFFSET (TREE_TYPE (caf_decl)) != NULL_TREE)
+    *offset = GFC_TYPE_ARRAY_CAF_OFFSET (TREE_TYPE (caf_decl));
+  else
+    *offset = build_int_cst (gfc_array_index_type, 0);
+
+  if (POINTER_TYPE_P (TREE_TYPE (se_expr))
+      && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se_expr))))
+    {
+      tmp = build_fold_indirect_ref_loc (input_location, se_expr);
+      tmp = gfc_conv_descriptor_data_get (tmp);
+    }
+  else if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (se_expr)))
+    tmp = gfc_conv_descriptor_data_get (se_expr);
+  else
+    {
+      gcc_assert (POINTER_TYPE_P (TREE_TYPE (se_expr)));
+      tmp = se_expr;
+    }
+
+  *offset = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type,
+			     *offset, fold_convert (gfc_array_index_type, tmp));
+
+  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (caf_decl)))
+    tmp = gfc_conv_descriptor_data_get (caf_decl);
+  else
+   {
+     gcc_assert (POINTER_TYPE_P (TREE_TYPE (caf_decl)));
+     tmp = caf_decl;
+   }
+
+  *offset = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
+			    fold_convert (gfc_array_index_type, *offset),
+			    fold_convert (gfc_array_index_type, tmp));
+}
+
+
+/* Convert the coindex of a coarray into an image index; the result is
+   image_num =  (idx(1)-lcobound(1)+1) + (idx(2)-lcobound(2)+1)*extent(1)
+              + (idx(3)-lcobound(3)+1)*extent(2) + ...  */
+
+tree
+gfc_caf_get_image_index (stmtblock_t *block, gfc_expr *e, tree desc)
+{
+  gfc_ref *ref;
+  tree lbound, ubound, extent, tmp, img_idx;
+  gfc_se se;
+  int i;
+
+  for (ref = e->ref; ref; ref = ref->next)
+    if (ref->type == REF_ARRAY && ref->u.ar.codimen > 0)
+      break;
+  gcc_assert (ref != NULL);
+
+  img_idx = integer_zero_node;
+  extent = integer_one_node;
+  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc)))
+    for (i = ref->u.ar.dimen; i < ref->u.ar.dimen + ref->u.ar.codimen; i++)
+      {
+	gfc_init_se (&se, NULL);
+	gfc_conv_expr_type (&se, ref->u.ar.start[i], integer_type_node);
+	gfc_add_block_to_block (block, &se.pre);
+	lbound = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[i]);
+	tmp = fold_build2_loc (input_location, MINUS_EXPR,
+			       integer_type_node, se.expr,
+			       fold_convert(integer_type_node, lbound));
+	tmp = fold_build2_loc (input_location, MULT_EXPR, integer_type_node,
+			       extent, tmp);
+	img_idx = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
+				   img_idx, tmp);
+	if (i < ref->u.ar.dimen + ref->u.ar.codimen - 1)
+	  {
+	    ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[i]);
+	    extent = gfc_conv_array_extent_dim (lbound, ubound, NULL);
+	    extent = fold_convert (integer_type_node, extent);
+	  }
+      }
+  else
+    for (i = ref->u.ar.dimen; i < ref->u.ar.dimen + ref->u.ar.codimen; i++)
+      {
+	gfc_init_se (&se, NULL);
+	gfc_conv_expr_type (&se, ref->u.ar.start[i], integer_type_node);
+	gfc_add_block_to_block (block, &se.pre);
+	lbound = GFC_TYPE_ARRAY_LBOUND (TREE_TYPE (desc), i);
+	lbound = fold_convert (integer_type_node, lbound);
+	tmp = fold_build2_loc (input_location, MINUS_EXPR,
+			       integer_type_node, se.expr, lbound);
+	tmp = fold_build2_loc (input_location, MULT_EXPR, integer_type_node,
+			       extent, tmp);
+	img_idx = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
+				   img_idx, tmp);
+	if (i < ref->u.ar.dimen + ref->u.ar.codimen - 1)
+	  {
+	    ubound = GFC_TYPE_ARRAY_UBOUND (TREE_TYPE (desc), i);
+	    ubound = fold_convert (integer_type_node, ubound);
+	    extent = fold_build2_loc (input_location, MINUS_EXPR,
+				      integer_type_node, ubound, lbound);
+	    extent = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
+				      extent, integer_one_node);
+	  }
+      }
+  img_idx = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
+			     img_idx, integer_one_node);
+  return img_idx;
+}
+
+
 /* For each character array constructor subexpression without a ts.u.cl->length,
    replace it by its first element (if there aren't any elements, the length
    should already be set to zero).  */
diff --git a/gcc/fortran/trans-intrinsic.c b/gcc/fortran/trans-intrinsic.c
index fd3c46a..3aa59c9 100644
--- a/gcc/fortran/trans-intrinsic.c
+++ b/gcc/fortran/trans-intrinsic.c
@@ -926,76 +926,6 @@  gfc_conv_intrinsic_exponent (gfc_se *se, gfc_expr *expr)
 }
 
 
-/* Convert the coindex of a coarray into an image index; the result is
-   image_num =  (idx(1)-lcobound(1)+1) + (idx(2)-lcobound(2)+1)*extent(1)
-              + (idx(3)-lcobound(3)+1)*extent(2) + ...  */
-
-static tree
-caf_get_image_index (stmtblock_t *block, gfc_expr *e, tree desc)
-{
-  gfc_ref *ref;
-  tree lbound, ubound, extent, tmp, img_idx;
-  gfc_se se;
-  int i;
-
-  for (ref = e->ref; ref; ref = ref->next)
-    if (ref->type == REF_ARRAY && ref->u.ar.codimen > 0)
-      break;
-  gcc_assert (ref != NULL);
-
-  img_idx = integer_zero_node;
-  extent = integer_one_node;
-  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (desc)))
-    for (i = ref->u.ar.dimen; i < ref->u.ar.dimen + ref->u.ar.codimen; i++)
-      {
-	gfc_init_se (&se, NULL);
-	gfc_conv_expr_type (&se, ref->u.ar.start[i], integer_type_node);
-	gfc_add_block_to_block (block, &se.pre);
-	lbound = gfc_conv_descriptor_lbound_get (desc, gfc_rank_cst[i]);
-	tmp = fold_build2_loc (input_location, MINUS_EXPR,
-			       integer_type_node, se.expr,
-			       fold_convert(integer_type_node, lbound));
-	tmp = fold_build2_loc (input_location, MULT_EXPR, integer_type_node,
-			       extent, tmp);
-	img_idx = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
-				   img_idx, tmp);
-	if (i < ref->u.ar.dimen + ref->u.ar.codimen - 1)
-	  {
-	    ubound = gfc_conv_descriptor_ubound_get (desc, gfc_rank_cst[i]);
-	    extent = gfc_conv_array_extent_dim (lbound, ubound, NULL);
-	    extent = fold_convert (integer_type_node, extent);
-	  }
-      }
-  else
-    for (i = ref->u.ar.dimen; i < ref->u.ar.dimen + ref->u.ar.codimen; i++)
-      {
-	gfc_init_se (&se, NULL);
-	gfc_conv_expr_type (&se, ref->u.ar.start[i], integer_type_node);
-	gfc_add_block_to_block (block, &se.pre);
-	lbound = GFC_TYPE_ARRAY_LBOUND (TREE_TYPE (desc), i);
-	lbound = fold_convert (integer_type_node, lbound);
-	tmp = fold_build2_loc (input_location, MINUS_EXPR,
-			       integer_type_node, se.expr, lbound);
-	tmp = fold_build2_loc (input_location, MULT_EXPR, integer_type_node,
-			       extent, tmp);
-	img_idx = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
-				   img_idx, tmp);
-	if (i < ref->u.ar.dimen + ref->u.ar.codimen - 1)
-	  {
-	    ubound = GFC_TYPE_ARRAY_UBOUND (TREE_TYPE (desc), i);
-	    ubound = fold_convert (integer_type_node, ubound);
-	    extent = fold_build2_loc (input_location, MINUS_EXPR,
-				      integer_type_node, ubound, lbound);
-	    extent = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
-				      extent, integer_one_node);
-	  }
-      }
-  img_idx = fold_build2_loc (input_location, PLUS_EXPR, integer_type_node,
-			     img_idx, integer_one_node);
-  return img_idx;
-}
-
-
 /* Fill in the following structure
      struct caf_vector_t {
        size_t nvec;  // size of the vector
@@ -1153,74 +1083,6 @@  conv_caf_vector_subscript (stmtblock_t *block, tree desc, gfc_array_ref *ar)
 }
 
 
-static void
-get_caf_token_offset (tree *token, tree *offset, tree caf_decl, tree se_expr,
-		      gfc_expr *expr)
-{
-  tree tmp;
-
-  /* Coarray token.  */
-  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (caf_decl)))
-    {
-      gcc_assert (GFC_TYPE_ARRAY_AKIND (TREE_TYPE (caf_decl))
-		    == GFC_ARRAY_ALLOCATABLE
-		  || expr->symtree->n.sym->attr.select_type_temporary);
-      *token = gfc_conv_descriptor_token (caf_decl);
-    }
-  else if (DECL_LANG_SPECIFIC (caf_decl)
-	   && GFC_DECL_TOKEN (caf_decl) != NULL_TREE)
-    *token = GFC_DECL_TOKEN (caf_decl);
-  else
-    {
-      gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (caf_decl))
-		  && GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (caf_decl)) != NULL_TREE);
-      *token = GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (caf_decl));
-    }
-
-  /* Offset between the coarray base address and the address wanted.  */
-  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (caf_decl))
-      && (GFC_TYPE_ARRAY_AKIND (TREE_TYPE (caf_decl)) == GFC_ARRAY_ALLOCATABLE
-	  || GFC_TYPE_ARRAY_AKIND (TREE_TYPE (caf_decl)) == GFC_ARRAY_POINTER))
-    *offset = build_int_cst (gfc_array_index_type, 0);
-  else if (DECL_LANG_SPECIFIC (caf_decl)
-	   && GFC_DECL_CAF_OFFSET (caf_decl) != NULL_TREE)
-    *offset = GFC_DECL_CAF_OFFSET (caf_decl);
-  else if (GFC_TYPE_ARRAY_CAF_OFFSET (TREE_TYPE (caf_decl)) != NULL_TREE)
-    *offset = GFC_TYPE_ARRAY_CAF_OFFSET (TREE_TYPE (caf_decl));
-  else
-    *offset = build_int_cst (gfc_array_index_type, 0);
-
-  if (POINTER_TYPE_P (TREE_TYPE (se_expr))
-      && GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (TREE_TYPE (se_expr))))
-    {
-      tmp = build_fold_indirect_ref_loc (input_location, se_expr);
-      tmp = gfc_conv_descriptor_data_get (tmp);
-    }
-  else if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (se_expr)))
-    tmp = gfc_conv_descriptor_data_get (se_expr);
-  else
-    {
-      gcc_assert (POINTER_TYPE_P (TREE_TYPE (se_expr)));
-      tmp = se_expr;
-    }
-
-  *offset = fold_build2_loc (input_location, PLUS_EXPR, gfc_array_index_type,
-			     *offset, fold_convert (gfc_array_index_type, tmp));
-
-  if (GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (caf_decl)))
-    tmp = gfc_conv_descriptor_data_get (caf_decl);
-  else
-   {
-     gcc_assert (POINTER_TYPE_P (TREE_TYPE (caf_decl)));
-     tmp = caf_decl;
-   }
-
-  *offset = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type,
-			    fold_convert (gfc_array_index_type, *offset),
-			    fold_convert (gfc_array_index_type, tmp));
-}
-
-
 /* Get data from a remote coarray.  */
 
 static void
@@ -1328,8 +1190,8 @@  gfc_conv_intrinsic_caf_get (gfc_se *se, gfc_expr *expr, tree lhs, tree lhs_kind)
   caf_decl = gfc_get_tree_for_caf_expr (array_expr);
   if (TREE_CODE (TREE_TYPE (caf_decl)) == REFERENCE_TYPE)
     caf_decl = build_fold_indirect_ref_loc (input_location, caf_decl);
-  image_index = caf_get_image_index (&se->pre, array_expr, caf_decl);
-  get_caf_token_offset (&token, &offset, caf_decl, argse.expr, array_expr);
+  image_index = gfc_caf_get_image_index (&se->pre, array_expr, caf_decl);
+  gfc_get_caf_token_offset (&token, &offset, caf_decl, argse.expr, array_expr);
 
   tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_get, 8,
 			     token, offset, image_index, argse.expr, vec,
@@ -1425,8 +1287,8 @@  conv_caf_send (gfc_code *code) {
   caf_decl = gfc_get_tree_for_caf_expr (lhs_expr);
   if (TREE_CODE (TREE_TYPE (caf_decl)) == REFERENCE_TYPE)
     caf_decl = build_fold_indirect_ref_loc (input_location, caf_decl);
-  image_index = caf_get_image_index (&block, lhs_expr, caf_decl);
-  get_caf_token_offset (&token, &offset, caf_decl, lhs_se.expr, lhs_expr);
+  image_index = gfc_caf_get_image_index (&block, lhs_expr, caf_decl);
+  gfc_get_caf_token_offset (&token, &offset, caf_decl, lhs_se.expr, lhs_expr);
 
   /* RHS.  */
   gfc_init_se (&rhs_se, NULL);
@@ -1490,9 +1352,9 @@  conv_caf_send (gfc_code *code) {
       caf_decl = gfc_get_tree_for_caf_expr (rhs_expr);
       if (TREE_CODE (TREE_TYPE (caf_decl)) == REFERENCE_TYPE)
 	caf_decl = build_fold_indirect_ref_loc (input_location, caf_decl);
-      rhs_image_index = caf_get_image_index (&block, rhs_expr, caf_decl);
-      get_caf_token_offset (&rhs_token, &rhs_offset, caf_decl, rhs_se.expr,
-			    rhs_expr);
+      rhs_image_index = gfc_caf_get_image_index (&block, rhs_expr, caf_decl);
+      gfc_get_caf_token_offset (&rhs_token, &rhs_offset, caf_decl, rhs_se.expr,
+				rhs_expr);
       tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_sendget, 12,
 				 token, offset, image_index, lhs_se.expr, vec,
 				 rhs_token, rhs_offset, rhs_image_index,
@@ -5908,7 +5770,7 @@  gfc_conv_intrinsic_sizeof (gfc_se *se, gfc_expr *expr)
   if (arg->ts.type == BT_ASSUMED)
     {
       /* This only works if an array descriptor has been passed; thus, extract
-	  the size from the descriptor.  */
+	 the size from the descriptor.  */
       gcc_assert (TYPE_PRECISION (gfc_array_index_type)
 		  == TYPE_PRECISION (size_type_node));
       tmp = arg->symtree->n.sym->backend_decl;
@@ -8519,7 +8381,7 @@  conv_intrinsic_atomic_op (gfc_code *code)
 	caf_decl = build_fold_indirect_ref_loc (input_location, caf_decl);
 
       if (gfc_is_coindexed (atom_expr))
-	image_index = caf_get_image_index (&block, atom_expr, caf_decl);
+	image_index = gfc_caf_get_image_index (&block, atom_expr, caf_decl);
       else
 	image_index = integer_zero_node;
 
@@ -8530,7 +8392,7 @@  conv_intrinsic_atomic_op (gfc_code *code)
           value = gfc_build_addr_expr (NULL_TREE, tmp);
 	}
 
-      get_caf_token_offset (&token, &offset, caf_decl, atom, atom_expr);
+      gfc_get_caf_token_offset (&token, &offset, caf_decl, atom, atom_expr);
 
       if (code->resolved_isym->id == GFC_ISYM_ATOMIC_DEF)
 	tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_atomic_def, 7,
@@ -8672,11 +8534,11 @@  conv_intrinsic_atomic_ref (gfc_code *code)
 	caf_decl = build_fold_indirect_ref_loc (input_location, caf_decl);
 
       if (gfc_is_coindexed (atom_expr))
-	image_index = caf_get_image_index (&block, atom_expr, caf_decl);
+	image_index = gfc_caf_get_image_index (&block, atom_expr, caf_decl);
       else
 	image_index = integer_zero_node;
 
-      get_caf_token_offset (&token, &offset, caf_decl, atom, atom_expr);
+      gfc_get_caf_token_offset (&token, &offset, caf_decl, atom, atom_expr);
 
       /* Different type, need type conversion.  */
       if (!POINTER_TYPE_P (TREE_TYPE (value)))
@@ -8790,7 +8652,7 @@  conv_intrinsic_atomic_cas (gfc_code *code)
 	caf_decl = build_fold_indirect_ref_loc (input_location, caf_decl);
 
       if (gfc_is_coindexed (atom_expr))
-	image_index = caf_get_image_index (&block, atom_expr, caf_decl);
+	image_index = gfc_caf_get_image_index (&block, atom_expr, caf_decl);
       else
 	image_index = integer_zero_node;
 
@@ -8809,7 +8671,7 @@  conv_intrinsic_atomic_cas (gfc_code *code)
           comp = gfc_build_addr_expr (NULL_TREE, tmp);
 	}
 
-      get_caf_token_offset (&token, &offset, caf_decl, atom, atom_expr);
+      gfc_get_caf_token_offset (&token, &offset, caf_decl, atom, atom_expr);
 
       tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_atomic_cas, 9,
 				 token, offset, image_index, old, comp, new_val,
diff --git a/gcc/fortran/trans.h b/gcc/fortran/trans.h
index 4703704..70c794b 100644
--- a/gcc/fortran/trans.h
+++ b/gcc/fortran/trans.h
@@ -420,6 +420,8 @@  tree gfc_conv_scalar_to_descriptor (gfc_se *, tree, symbol_attribute);
 void gfc_conv_scalar_char_value (gfc_symbol *sym, gfc_se *se, gfc_expr **expr);
 tree gfc_string_to_single_character (tree len, tree str, int kind);
 tree gfc_get_tree_for_caf_expr (gfc_expr *);
+void gfc_get_caf_token_offset (tree *, tree *, tree, tree, gfc_expr *);
+tree gfc_caf_get_image_index (stmtblock_t *, gfc_expr *, tree);
 
 /* Find the decl containing the auxiliary variables for assigned variables.  */
 void gfc_conv_label_variable (gfc_se * se, gfc_expr * expr);