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[Fortran] Cleanup patch.


The attached patch was regression tested on i686-*-freebsd.
It renames the expr and label members of the gfc_code structure
to expr1 and label1, which are then consistent with expr2, label2,
label3, and the soon to be added expr3.

Note, there is one functional change in dump-parse-tree.c.

2009-05-06  Steven G. Kargl  <kargl@gcc.gnu.org>

	* gfortran.h (gfc_code): Rename member expr to expr1 and
	member label to label1.
	* trans-stmt.c (gfc_trans_label_assign, gfc_trans_goto, gfc_trans_call,
	gfc_trans_return, gfc_trans_stop, gfc_trans_if_1, gfc_trans_do_while,
	gfc_trans_arithmetic_if, gfc_trans_integer_select, gfc_trans_forall_1,
	gfc_trans_logical_select, gfc_trans_character_select, gfc_trans_where,
	forall_make_variable_temp, check_forall_dependencies,
	gfc_trans_where_2, gfc_trans_where_3, gfc_trans_allocate,
	gfc_trans_deallocate): Change expr to expr1 and label to label1.
	* trans-openmp.c (gfc_trans_omp_atomic): Ditto.
	* st.c (gfc_free_statement): Ditto.
	* trans-io.c (gfc_trans_transfer): Ditto.
	* match.c (gfc_match_assignment, gfc_match_pointer_assignment,
	match_arithmetic_if, gfc_match_if, gfc_match_elseif,
	gfc_match_stopcode, gfc_match_assign, gfc_match_goto, gfc_match_nullify,
	gfc_match_allocate, gfc_match_deallocate, match_typebound_call,
	gfc_match_call, gfc_match_select, match_simple_where, gfc_match_where,
	gfc_match_elsewhere, match_simple_forall): Ditto.
	* parse.c (parse_where_block, parse_if_block, parse_do_block): Ditto.
	* io.c (match_io_element): Ditto.
	* resolve.c (resolve_typebound_call, resolve_select, resolve_transfer,
	resolve_allocate_expr, resolve_allocate_deallocate, resolve_where,
	gfc_resolve_assign_in_forall, gfc_resolve_blocks,
	resolve_ordinary_assign, resolve_code, build_init_assign): Ditto.
	* openmp.c (resolve_omp_atomic): Ditto.
	* interface.c (gfc_extend_assign): Ditto.
	* trans-expr.c (gfc_trans_pointer_assign, gfc_trans_init_assign,
	gfc_trans_assign): Ditto.
	* dump-parse-tree.c (show_code_node): Ditto.  Add dumping of
	ERRMSG in ALLOCATE and DEALLOCATE.

OK for trunk?

-- 
Steve
Index: openmp.c
===================================================================
--- openmp.c	(revision 147131)
+++ openmp.c	(working copy)
@@ -1072,20 +1072,20 @@ resolve_omp_atomic (gfc_code *code)
   gcc_assert (code->op == EXEC_ASSIGN);
   gcc_assert (code->next == NULL);
 
-  if (code->expr->expr_type != EXPR_VARIABLE
-      || code->expr->symtree == NULL
-      || code->expr->rank != 0
-      || (code->expr->ts.type != BT_INTEGER
-	  && code->expr->ts.type != BT_REAL
-	  && code->expr->ts.type != BT_COMPLEX
-	  && code->expr->ts.type != BT_LOGICAL))
+  if (code->expr1->expr_type != EXPR_VARIABLE
+      || code->expr1->symtree == NULL
+      || code->expr1->rank != 0
+      || (code->expr1->ts.type != BT_INTEGER
+	  && code->expr1->ts.type != BT_REAL
+	  && code->expr1->ts.type != BT_COMPLEX
+	  && code->expr1->ts.type != BT_LOGICAL))
     {
       gfc_error ("!$OMP ATOMIC statement must set a scalar variable of "
 		 "intrinsic type at %L", &code->loc);
       return;
     }
 
-  var = code->expr->symtree->n.sym;
+  var = code->expr1->symtree->n.sym;
   expr2 = is_conversion (code->expr2, false);
   if (expr2 == NULL)
     expr2 = code->expr2;
Index: interface.c
===================================================================
--- interface.c	(revision 147131)
+++ interface.c	(working copy)
@@ -2590,7 +2590,7 @@ gfc_extend_assign (gfc_code *c, gfc_name
   gfc_expr *lhs, *rhs;
   gfc_symbol *sym;
 
-  lhs = c->expr;
+  lhs = c->expr1;
   rhs = c->expr2;
 
   /* Don't allow an intrinsic assignment to be replaced.  */
@@ -2625,7 +2625,7 @@ gfc_extend_assign (gfc_code *c, gfc_name
   /* Replace the assignment with the call.  */
   c->op = EXEC_ASSIGN_CALL;
   c->symtree = gfc_find_sym_in_symtree (sym);
-  c->expr = NULL;
+  c->expr1 = NULL;
   c->expr2 = NULL;
   c->ext.actual = actual;
 
Index: trans-expr.c
===================================================================
--- trans-expr.c	(revision 147131)
+++ trans-expr.c	(working copy)
@@ -4028,7 +4028,7 @@ gfc_conv_expr_reference (gfc_se * se, gf
 tree
 gfc_trans_pointer_assign (gfc_code * code)
 {
-  return gfc_trans_pointer_assignment (code->expr, code->expr2);
+  return gfc_trans_pointer_assignment (code->expr1, code->expr2);
 }
 
 
@@ -4853,11 +4853,11 @@ gfc_trans_assignment (gfc_expr * expr1, 
 tree
 gfc_trans_init_assign (gfc_code * code)
 {
-  return gfc_trans_assignment (code->expr, code->expr2, true);
+  return gfc_trans_assignment (code->expr1, code->expr2, true);
 }
 
 tree
 gfc_trans_assign (gfc_code * code)
 {
-  return gfc_trans_assignment (code->expr, code->expr2, false);
+  return gfc_trans_assignment (code->expr1, code->expr2, false);
 }
Index: dump-parse-tree.c
===================================================================
--- dump-parse-tree.c	(revision 147131)
+++ dump-parse-tree.c	(working copy)
@@ -1154,38 +1154,38 @@ show_code_node (int level, gfc_code *c)
     case EXEC_INIT_ASSIGN:
     case EXEC_ASSIGN:
       fputs ("ASSIGN ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       fputc (' ', dumpfile);
       show_expr (c->expr2);
       break;
 
     case EXEC_LABEL_ASSIGN:
       fputs ("LABEL ASSIGN ", dumpfile);
-      show_expr (c->expr);
-      fprintf (dumpfile, " %d", c->label->value);
+      show_expr (c->expr1);
+      fprintf (dumpfile, " %d", c->label1->value);
       break;
 
     case EXEC_POINTER_ASSIGN:
       fputs ("POINTER ASSIGN ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       fputc (' ', dumpfile);
       show_expr (c->expr2);
       break;
 
     case EXEC_GOTO:
       fputs ("GOTO ", dumpfile);
-      if (c->label)
-	fprintf (dumpfile, "%d", c->label->value);
+      if (c->label1)
+	fprintf (dumpfile, "%d", c->label1->value);
       else
 	{
-	  show_expr (c->expr);
+	  show_expr (c->expr1);
 	  d = c->block;
 	  if (d != NULL)
 	    {
 	      fputs (", (", dumpfile);
 	      for (; d; d = d ->block)
 		{
-		  code_indent (level, d->label);
+		  code_indent (level, d->label1);
 		  if (d->block != NULL)
 		    fputc (',', dumpfile);
 		  else
@@ -1209,20 +1209,20 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_COMPCALL:
       fputs ("CALL ", dumpfile);
-      show_compcall (c->expr);
+      show_compcall (c->expr1);
       break;
 
     case EXEC_RETURN:
       fputs ("RETURN ", dumpfile);
-      if (c->expr)
-	show_expr (c->expr);
+      if (c->expr1)
+	show_expr (c->expr1);
       break;
 
     case EXEC_PAUSE:
       fputs ("PAUSE ", dumpfile);
 
-      if (c->expr != NULL)
-	show_expr (c->expr);
+      if (c->expr1 != NULL)
+	show_expr (c->expr1);
       else
 	fprintf (dumpfile, "%d", c->ext.stop_code);
 
@@ -1231,8 +1231,8 @@ show_code_node (int level, gfc_code *c)
     case EXEC_STOP:
       fputs ("STOP ", dumpfile);
 
-      if (c->expr != NULL)
-	show_expr (c->expr);
+      if (c->expr1 != NULL)
+	show_expr (c->expr1);
       else
 	fprintf (dumpfile, "%d", c->ext.stop_code);
 
@@ -1240,15 +1240,15 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_ARITHMETIC_IF:
       fputs ("IF ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       fprintf (dumpfile, " %d, %d, %d",
-		  c->label->value, c->label2->value, c->label3->value);
+		  c->label1->value, c->label2->value, c->label3->value);
       break;
 
     case EXEC_IF:
       d = c->block;
       fputs ("IF ", dumpfile);
-      show_expr (d->expr);
+      show_expr (d->expr1);
       fputc ('\n', dumpfile);
       show_code (level + 1, d->next);
 
@@ -1257,19 +1257,19 @@ show_code_node (int level, gfc_code *c)
 	{
 	  code_indent (level, 0);
 
-	  if (d->expr == NULL)
+	  if (d->expr1 == NULL)
 	    fputs ("ELSE\n", dumpfile);
 	  else
 	    {
 	      fputs ("ELSE IF ", dumpfile);
-	      show_expr (d->expr);
+	      show_expr (d->expr1);
 	      fputc ('\n', dumpfile);
 	    }
 
 	  show_code (level + 1, d->next);
 	}
 
-      code_indent (level, c->label);
+      code_indent (level, c->label1);
 
       fputs ("ENDIF", dumpfile);
       break;
@@ -1277,7 +1277,7 @@ show_code_node (int level, gfc_code *c)
     case EXEC_SELECT:
       d = c->block;
       fputs ("SELECT CASE ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       fputc ('\n', dumpfile);
 
       for (; d; d = d->block)
@@ -1299,7 +1299,7 @@ show_code_node (int level, gfc_code *c)
 	  show_code (level + 1, d->next);
 	}
 
-      code_indent (level, c->label);
+      code_indent (level, c->label1);
       fputs ("END SELECT", dumpfile);
       break;
 
@@ -1307,7 +1307,7 @@ show_code_node (int level, gfc_code *c)
       fputs ("WHERE ", dumpfile);
 
       d = c->block;
-      show_expr (d->expr);
+      show_expr (d->expr1);
       fputc ('\n', dumpfile);
 
       show_code (level + 1, d->next);
@@ -1316,7 +1316,7 @@ show_code_node (int level, gfc_code *c)
 	{
 	  code_indent (level, 0);
 	  fputs ("ELSE WHERE ", dumpfile);
-	  show_expr (d->expr);
+	  show_expr (d->expr1);
 	  fputc ('\n', dumpfile);
 	  show_code (level + 1, d->next);
 	}
@@ -1342,10 +1342,10 @@ show_code_node (int level, gfc_code *c)
 	    fputc (',', dumpfile);
 	}
 
-      if (c->expr != NULL)
+      if (c->expr1 != NULL)
 	{
 	  fputc (',', dumpfile);
-	  show_expr (c->expr);
+	  show_expr (c->expr1);
 	}
       fputc ('\n', dumpfile);
 
@@ -1375,12 +1375,12 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_DO_WHILE:
       fputs ("DO WHILE ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       fputc ('\n', dumpfile);
 
       show_code (level + 1, c->block->next);
 
-      code_indent (level, c->label);
+      code_indent (level, c->label1);
       fputs ("END DO", dumpfile);
       break;
 
@@ -1398,10 +1398,16 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_ALLOCATE:
       fputs ("ALLOCATE ", dumpfile);
-      if (c->expr)
+      if (c->expr1)
 	{
 	  fputs (" STAT=", dumpfile);
-	  show_expr (c->expr);
+	  show_expr (c->expr1);
+	}
+
+      if (c->expr2)
+	{
+	  fputs (" ERRMSG=", dumpfile);
+	  show_expr (c->expr2);
 	}
 
       for (a = c->ext.alloc_list; a; a = a->next)
@@ -1414,10 +1420,16 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_DEALLOCATE:
       fputs ("DEALLOCATE ", dumpfile);
-      if (c->expr)
+      if (c->expr1)
 	{
 	  fputs (" STAT=", dumpfile);
-	  show_expr (c->expr);
+	  show_expr (c->expr1);
+	}
+
+      if (c->expr2)
+	{
+	  fputs (" ERRMSG=", dumpfile);
+	  show_expr (c->expr2);
 	}
 
       for (a = c->ext.alloc_list; a; a = a->next)
@@ -1780,7 +1792,7 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_IOLENGTH:
       fputs ("IOLENGTH ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       goto show_dt_code;
       break;
 
@@ -1889,7 +1901,7 @@ show_code_node (int level, gfc_code *c)
 
     case EXEC_TRANSFER:
       fputs ("TRANSFER ", dumpfile);
-      show_expr (c->expr);
+      show_expr (c->expr1);
       break;
 
     case EXEC_DT_END:
Index: trans-openmp.c
===================================================================
--- trans-openmp.c	(revision 147131)
+++ trans-openmp.c	(working copy)
@@ -952,13 +952,13 @@ gfc_trans_omp_atomic (gfc_code *code)
   code = code->block->next;
   gcc_assert (code->op == EXEC_ASSIGN);
   gcc_assert (code->next == NULL);
-  var = code->expr->symtree->n.sym;
+  var = code->expr1->symtree->n.sym;
 
   gfc_init_se (&lse, NULL);
   gfc_init_se (&rse, NULL);
   gfc_start_block (&block);
 
-  gfc_conv_expr (&lse, code->expr);
+  gfc_conv_expr (&lse, code->expr1);
   gfc_add_block_to_block (&block, &lse.pre);
   type = TREE_TYPE (lse.expr);
   lhsaddr = gfc_build_addr_expr (NULL, lse.expr);
Index: gfortran.h
===================================================================
--- gfortran.h	(revision 147131)
+++ gfortran.h	(working copy)
@@ -1904,9 +1904,9 @@ typedef struct gfc_code
   struct gfc_code *block, *next;
   locus loc;
 
-  gfc_st_label *here, *label, *label2, *label3;
+  gfc_st_label *here, *label1, *label2, *label3;
   gfc_symtree *symtree;
-  gfc_expr *expr, *expr2;
+  gfc_expr *expr1, *expr2;
   /* A name isn't sufficient to identify a subroutine, we need the actual
      symbol for the interface definition.
   const char *sub_name;  */
Index: trans-stmt.c
===================================================================
--- trans-stmt.c	(revision 147131)
+++ trans-stmt.c	(working copy)
@@ -104,21 +104,21 @@ gfc_trans_label_assign (gfc_code * code)
   /* Start a new block.  */
   gfc_init_se (&se, NULL);
   gfc_start_block (&se.pre);
-  gfc_conv_label_variable (&se, code->expr);
+  gfc_conv_label_variable (&se, code->expr1);
 
   len = GFC_DECL_STRING_LEN (se.expr);
   addr = GFC_DECL_ASSIGN_ADDR (se.expr);
 
-  label_tree = gfc_get_label_decl (code->label);
+  label_tree = gfc_get_label_decl (code->label1);
 
-  if (code->label->defined == ST_LABEL_TARGET)
+  if (code->label1->defined == ST_LABEL_TARGET)
     {
       label_tree = gfc_build_addr_expr (pvoid_type_node, label_tree);
       len_tree = integer_minus_one_node;
     }
   else
     {
-      gfc_expr *format = code->label->format;
+      gfc_expr *format = code->label1->format;
 
       label_len = format->value.character.length;
       len_tree = build_int_cst (NULL_TREE, label_len);
@@ -144,13 +144,13 @@ gfc_trans_goto (gfc_code * code)
   tree tmp;
   gfc_se se;
 
-  if (code->label != NULL)
-    return build1_v (GOTO_EXPR, gfc_get_label_decl (code->label));
+  if (code->label1 != NULL)
+    return build1_v (GOTO_EXPR, gfc_get_label_decl (code->label1));
 
   /* ASSIGNED GOTO.  */
   gfc_init_se (&se, NULL);
   gfc_start_block (&se.pre);
-  gfc_conv_label_variable (&se, code->expr);
+  gfc_conv_label_variable (&se, code->expr1);
   tmp = GFC_DECL_STRING_LEN (se.expr);
   tmp = fold_build2 (NE_EXPR, boolean_type_node, tmp,
 		     build_int_cst (TREE_TYPE (tmp), -1));
@@ -170,7 +170,7 @@ gfc_trans_goto (gfc_code * code)
   /* Check the label list.  */
   do
     {
-      target = gfc_get_label_decl (code->label);
+      target = gfc_get_label_decl (code->label1);
       tmp = gfc_build_addr_expr (pvoid_type_node, target);
       tmp = fold_build2 (EQ_EXPR, boolean_type_node, tmp, assigned_goto);
       tmp = build3_v (COND_EXPR, tmp,
@@ -369,7 +369,7 @@ gfc_trans_call (gfc_code * code, bool de
 	  gfc_symbol *sym;
 	  select_code = code->next;
 	  gcc_assert(select_code->op == EXEC_SELECT);
-	  sym = select_code->expr->symtree->n.sym;
+	  sym = select_code->expr1->symtree->n.sym;
 	  se.expr = convert (gfc_typenode_for_spec (&sym->ts), se.expr);
 	  if (sym->backend_decl == NULL)
 	    sym->backend_decl = gfc_get_symbol_decl (sym);
@@ -405,7 +405,7 @@ gfc_trans_call (gfc_code * code, bool de
 	 subscripts.  This could be prevented in the elemental case  
 	 as temporaries are handled separatedly 
 	 (below in gfc_conv_elemental_dependencies).  */
-      gfc_conv_loop_setup (&loop, &code->expr->where);
+      gfc_conv_loop_setup (&loop, &code->expr1->where);
       gfc_mark_ss_chain_used (ss, 1);
 
       /* Convert the arguments, checking for dependencies.  */
@@ -455,7 +455,7 @@ gfc_trans_call (gfc_code * code, bool de
 tree
 gfc_trans_return (gfc_code * code ATTRIBUTE_UNUSED)
 {
-  if (code->expr)
+  if (code->expr1)
     {
       gfc_se se;
       tree tmp;
@@ -469,7 +469,7 @@ gfc_trans_return (gfc_code * code ATTRIB
       if (!result)
         {
           gfc_warning ("An alternate return at %L without a * dummy argument",
-                        &code->expr->where);
+                        &code->expr1->where);
           return build1_v (GOTO_EXPR, gfc_get_return_label ());
         }
 
@@ -477,7 +477,7 @@ gfc_trans_return (gfc_code * code ATTRIB
       gfc_init_se (&se, NULL);
       gfc_start_block (&se.pre);
 
-      gfc_conv_expr (&se, code->expr);
+      gfc_conv_expr (&se, code->expr1);
 
       tmp = fold_build2 (MODIFY_EXPR, TREE_TYPE (result), result,
 			 fold_convert (TREE_TYPE (result), se.expr));
@@ -508,14 +508,14 @@ gfc_trans_pause (gfc_code * code)
   gfc_start_block (&se.pre);
 
 
-  if (code->expr == NULL)
+  if (code->expr1 == NULL)
     {
       tmp = build_int_cst (gfc_int4_type_node, code->ext.stop_code);
       tmp = build_call_expr (gfor_fndecl_pause_numeric, 1, tmp);
     }
   else
     {
-      gfc_conv_expr_reference (&se, code->expr);
+      gfc_conv_expr_reference (&se, code->expr1);
       tmp = build_call_expr (gfor_fndecl_pause_string, 2,
 			     se.expr, se.string_length);
     }
@@ -543,14 +543,14 @@ gfc_trans_stop (gfc_code * code)
   gfc_start_block (&se.pre);
 
 
-  if (code->expr == NULL)
+  if (code->expr1 == NULL)
     {
       tmp = build_int_cst (gfc_int4_type_node, code->ext.stop_code);
       tmp = build_call_expr (gfor_fndecl_stop_numeric, 1, tmp);
     }
   else
     {
-      gfc_conv_expr_reference (&se, code->expr);
+      gfc_conv_expr_reference (&se, code->expr1);
       tmp = build_call_expr (gfor_fndecl_stop_string, 2,
 			     se.expr, se.string_length);
     }
@@ -610,7 +610,7 @@ gfc_trans_if_1 (gfc_code * code)
   tree stmt, elsestmt;
 
   /* Check for an unconditional ELSE clause.  */
-  if (!code->expr)
+  if (!code->expr1)
     return gfc_trans_code (code->next);
 
   /* Initialize a statement builder for each block. Puts in NULL_TREEs.  */
@@ -618,7 +618,7 @@ gfc_trans_if_1 (gfc_code * code)
   gfc_start_block (&if_se.pre);
 
   /* Calculate the IF condition expression.  */
-  gfc_conv_expr_val (&if_se, code->expr);
+  gfc_conv_expr_val (&if_se, code->expr1);
 
   /* Translate the THEN clause.  */
   stmt = gfc_trans_code (code->next);
@@ -685,20 +685,20 @@ gfc_trans_arithmetic_if (gfc_code * code
   gfc_start_block (&se.pre);
 
   /* Pre-evaluate COND.  */
-  gfc_conv_expr_val (&se, code->expr);
+  gfc_conv_expr_val (&se, code->expr1);
   se.expr = gfc_evaluate_now (se.expr, &se.pre);
 
   /* Build something to compare with.  */
   zero = gfc_build_const (TREE_TYPE (se.expr), integer_zero_node);
 
-  if (code->label->value != code->label2->value)
+  if (code->label1->value != code->label2->value)
     {
       /* If (cond < 0) take branch1 else take branch2.
          First build jumps to the COND .LT. 0 and the COND .EQ. 0 cases.  */
-      branch1 = build1_v (GOTO_EXPR, gfc_get_label_decl (code->label));
+      branch1 = build1_v (GOTO_EXPR, gfc_get_label_decl (code->label1));
       branch2 = build1_v (GOTO_EXPR, gfc_get_label_decl (code->label2));
 
-      if (code->label->value != code->label3->value)
+      if (code->label1->value != code->label3->value)
         tmp = fold_build2 (LT_EXPR, boolean_type_node, se.expr, zero);
       else
         tmp = fold_build2 (NE_EXPR, boolean_type_node, se.expr, zero);
@@ -706,9 +706,9 @@ gfc_trans_arithmetic_if (gfc_code * code
       branch1 = fold_build3 (COND_EXPR, void_type_node, tmp, branch1, branch2);
     }
   else
-    branch1 = build1_v (GOTO_EXPR, gfc_get_label_decl (code->label));
+    branch1 = build1_v (GOTO_EXPR, gfc_get_label_decl (code->label1));
 
-  if (code->label->value != code->label3->value
+  if (code->label1->value != code->label3->value
       && code->label2->value != code->label3->value)
     {
       /* if (cond <= 0) take branch1 else take branch2.  */
@@ -1132,7 +1132,7 @@ gfc_trans_do_while (gfc_code * code)
 
   /* Create a GIMPLE version of the exit condition.  */
   gfc_init_se (&cond, NULL);
-  gfc_conv_expr_val (&cond, code->expr);
+  gfc_conv_expr_val (&cond, code->expr1);
   gfc_add_block_to_block (&block, &cond.pre);
   cond.expr = fold_build1 (TRUTH_NOT_EXPR, boolean_type_node, cond.expr);
 
@@ -1230,7 +1230,7 @@ gfc_trans_integer_select (gfc_code * cod
 
   /* Calculate the switch expression.  */
   gfc_init_se (&se, NULL);
-  gfc_conv_expr_val (&se, code->expr);
+  gfc_conv_expr_val (&se, code->expr1);
   gfc_add_block_to_block (&block, &se.pre);
 
   end_label = gfc_build_label_decl (NULL_TREE);
@@ -1371,7 +1371,7 @@ gfc_trans_logical_select (gfc_code * cod
   /* Calculate the switch expression.  We always need to do this
      because it may have side effects.  */
   gfc_init_se (&se, NULL);
-  gfc_conv_expr_val (&se, code->expr);
+  gfc_conv_expr_val (&se, code->expr1);
   gfc_add_block_to_block (&block, &se.pre);
 
   if (t == f && t != NULL)
@@ -1444,11 +1444,11 @@ gfc_trans_character_select (gfc_code *co
   static tree ss_string2[2], ss_string2_len[2];
   static tree ss_target[2];
 
-  tree pchartype = gfc_get_pchar_type (code->expr->ts.kind);
+  tree pchartype = gfc_get_pchar_type (code->expr1->ts.kind);
 
-  if (code->expr->ts.kind == 1)
+  if (code->expr1->ts.kind == 1)
     k = 0;
-  else if (code->expr->ts.kind == 4)
+  else if (code->expr1->ts.kind == 4)
     k = 1;
   else
     gcc_unreachable ();
@@ -1457,9 +1457,9 @@ gfc_trans_character_select (gfc_code *co
     {
       select_struct[k] = make_node (RECORD_TYPE);
 
-      if (code->expr->ts.kind == 1)
+      if (code->expr1->ts.kind == 1)
 	TYPE_NAME (select_struct[k]) = get_identifier ("_jump_struct_char1");
-      else if (code->expr->ts.kind == 4)
+      else if (code->expr1->ts.kind == 4)
 	TYPE_NAME (select_struct[k]) = get_identifier ("_jump_struct_char4");
       else
 	gcc_unreachable ();
@@ -1575,13 +1575,13 @@ gfc_trans_character_select (gfc_code *co
   init = gfc_build_addr_expr (pvoid_type_node, init);
 
   gfc_init_se (&se, NULL);
-  gfc_conv_expr_reference (&se, code->expr);
+  gfc_conv_expr_reference (&se, code->expr1);
 
   gfc_add_block_to_block (&block, &se.pre);
 
-  if (code->expr->ts.kind == 1)
+  if (code->expr1->ts.kind == 1)
     fndecl = gfor_fndecl_select_string;
-  else if (code->expr->ts.kind == 4)
+  else if (code->expr1->ts.kind == 4)
     fndecl = gfor_fndecl_select_string_char4;
   else
     gcc_unreachable ();
@@ -1621,14 +1621,14 @@ gfc_trans_character_select (gfc_code *co
 tree
 gfc_trans_select (gfc_code * code)
 {
-  gcc_assert (code && code->expr);
+  gcc_assert (code && code->expr1);
 
   /* Empty SELECT constructs are legal.  */
   if (code->block == NULL)
     return build_empty_stmt ();
 
   /* Select the correct translation function.  */
-  switch (code->expr->ts.type)
+  switch (code->expr1->ts.type)
     {
     case BT_LOGICAL:	return gfc_trans_logical_select (code);
     case BT_INTEGER:	return gfc_trans_integer_select (code);
@@ -1704,7 +1704,7 @@ forall_make_variable_temp (gfc_code *c, 
   tree tmp;
 
   /* Build a copy of the lvalue.  */
-  old_symtree = c->expr->symtree;
+  old_symtree = c->expr1->symtree;
   old_sym = old_symtree->n.sym;
   e = gfc_lval_expr_from_sym (old_sym);
   if (old_sym->attr.dimension)
@@ -1769,7 +1769,7 @@ forall_make_variable_temp (gfc_code *c, 
 
   /* Go through the expression reference replacing the old_symtree
      with the new.  */
-  forall_replace_symtree (c->expr, old_sym, 2);
+  forall_replace_symtree (c->expr1, old_sym, 2);
 
   /* Now we have made this temporary, we might as well use it for
   the right hand side.  */
@@ -1786,8 +1786,8 @@ check_forall_dependencies (gfc_code *c, 
   int need_temp;
   gfc_symbol *lsym;
 
-  lsym = c->expr->symtree->n.sym;
-  need_temp = gfc_check_dependency (c->expr, c->expr2, 0);
+  lsym = c->expr1->symtree->n.sym;
+  need_temp = gfc_check_dependency (c->expr1, c->expr2, 0);
 
   /* Now check for dependencies within the 'variable'
      expression itself.  These are treated by making a complete
@@ -1801,7 +1801,7 @@ check_forall_dependencies (gfc_code *c, 
     return need_temp;
 
   new_symtree = NULL;
-  if (find_forall_index (c->expr, lsym, 2) == SUCCESS)
+  if (find_forall_index (c->expr1, lsym, 2) == SUCCESS)
     {
       forall_make_variable_temp (c, pre, post);
       need_temp = 0;
@@ -1809,12 +1809,12 @@ check_forall_dependencies (gfc_code *c, 
 
   /* Substrings with dependencies are treated in the same
      way.  */
-  if (c->expr->ts.type == BT_CHARACTER
-	&& c->expr->ref
+  if (c->expr1->ts.type == BT_CHARACTER
+	&& c->expr1->ref
 	&& c->expr2->expr_type == EXPR_VARIABLE
 	&& lsym == c->expr2->symtree->n.sym)
     {
-      for (lref = c->expr->ref; lref; lref = lref->next)
+      for (lref = c->expr1->ref; lref; lref = lref->next)
 	if (lref->type == REF_SUBSTRING)
 	  break;
       for (rref = c->expr2->ref; rref; rref = rref->next)
@@ -1835,7 +1835,7 @@ check_forall_dependencies (gfc_code *c, 
 static void
 cleanup_forall_symtrees (gfc_code *c)
 {
-  forall_restore_symtree (c->expr);
+  forall_restore_symtree (c->expr1);
   forall_restore_symtree (c->expr2);
   gfc_free (new_symtree->n.sym);
   gfc_free (new_symtree);
@@ -2785,9 +2785,9 @@ gfc_trans_forall_1 (gfc_code * code, for
   bool need_mask;
 
   /* Do nothing if the mask is false.  */
-  if (code->expr
-      && code->expr->expr_type == EXPR_CONSTANT
-      && !code->expr->value.logical)
+  if (code->expr1
+      && code->expr1->expr_type == EXPR_CONSTANT
+      && !code->expr1->value.logical)
     return build_empty_stmt ();
 
   n = 0;
@@ -2890,11 +2890,11 @@ gfc_trans_forall_1 (gfc_code * code, for
   info->nvar = nvar;
   info->size = size;
 
-  if (code->expr)
+  if (code->expr1)
     {
       /* If the mask is .true., consider the FORALL unconditional.  */
-      if (code->expr->expr_type == EXPR_CONSTANT
-	  && code->expr->value.logical)
+      if (code->expr1->expr_type == EXPR_CONSTANT
+	  && code->expr1->value.logical)
 	need_mask = false;
       else
 	need_mask = true;
@@ -2940,7 +2940,7 @@ gfc_trans_forall_1 (gfc_code * code, for
 
       /* Evaluate the mask expression.  */
       gfc_init_se (&se, NULL);
-      gfc_conv_expr_val (&se, code->expr);
+      gfc_conv_expr_val (&se, code->expr1);
       gfc_add_block_to_block (&body, &se.pre);
 
       /* Store the mask.  */
@@ -2977,12 +2977,12 @@ gfc_trans_forall_1 (gfc_code * code, for
           /* Temporaries due to array assignment data dependencies introduce
              no end of problems.  */
 	  if (need_temp)
-            gfc_trans_assign_need_temp (c->expr, c->expr2, NULL, false,
+            gfc_trans_assign_need_temp (c->expr1, c->expr2, NULL, false,
                                         nested_forall_info, &block);
           else
             {
               /* Use the normal assignment copying routines.  */
-              assign = gfc_trans_assignment (c->expr, c->expr2, false);
+              assign = gfc_trans_assignment (c->expr1, c->expr2, false);
 
               /* Generate body and loops.  */
               tmp = gfc_trans_nested_forall_loop (nested_forall_info,
@@ -3004,14 +3004,14 @@ gfc_trans_forall_1 (gfc_code * code, for
 
         /* Pointer assignment inside FORALL.  */
 	case EXEC_POINTER_ASSIGN:
-          need_temp = gfc_check_dependency (c->expr, c->expr2, 0);
+          need_temp = gfc_check_dependency (c->expr1, c->expr2, 0);
           if (need_temp)
-            gfc_trans_pointer_assign_need_temp (c->expr, c->expr2,
+            gfc_trans_pointer_assign_need_temp (c->expr1, c->expr2,
                                                 nested_forall_info, &block);
           else
             {
               /* Use the normal assignment copying routines.  */
-              assign = gfc_trans_pointer_assignment (c->expr, c->expr2);
+              assign = gfc_trans_pointer_assignment (c->expr1, c->expr2);
 
               /* Generate body and loops.  */
               tmp = gfc_trans_nested_forall_loop (nested_forall_info,
@@ -3490,7 +3490,7 @@ gfc_trans_where_2 (gfc_code * code, tree
   /* Two clauses, the first empty, the second non-empty.  */
   else if (mask)
     {
-      need_cmask = (cblock->block->expr != 0);
+      need_cmask = (cblock->block->expr1 != 0);
       need_pmask = true;
     }
   else
@@ -3503,7 +3503,7 @@ gfc_trans_where_2 (gfc_code * code, tree
     {
       /* Calculate the size of temporary needed by the mask-expr.  */
       gfc_init_block (&inner_size_body);
-      inner_size = compute_inner_temp_size (cblock->expr, cblock->expr,
+      inner_size = compute_inner_temp_size (cblock->expr1, cblock->expr1,
 					    &inner_size_body, &lss, &rss);
 
       /* Calculate the total size of temporary needed.  */
@@ -3535,7 +3535,7 @@ gfc_trans_where_2 (gfc_code * code, tree
 	 bottom of the loop.  */
 
       /* Has mask-expr.  */
-      if (cblock->expr)
+      if (cblock->expr1)
         {
           /* Ensure that the WHERE mask will be evaluated exactly once.
 	     If there are no statements in this WHERE/ELSEWHERE clause,
@@ -3543,13 +3543,13 @@ gfc_trans_where_2 (gfc_code * code, tree
 	     If this is the last clause of the WHERE construct, then
 	     we don't need to update the pending control mask (pmask).  */
 	  if (mask)
-	    gfc_evaluate_where_mask (cblock->expr, nested_forall_info,
+	    gfc_evaluate_where_mask (cblock->expr1, nested_forall_info,
 				     mask, invert,
 				     cblock->next  ? cmask : NULL_TREE,
 				     cblock->block ? pmask : NULL_TREE,
 				     mask_type, block);
 	  else
-	    gfc_evaluate_where_mask (cblock->expr, nested_forall_info,
+	    gfc_evaluate_where_mask (cblock->expr1, nested_forall_info,
 				     NULL_TREE, false,
 				     (cblock->next || cblock->block)
 				     ? cmask : NULL_TREE,
@@ -3588,7 +3588,7 @@ gfc_trans_where_2 (gfc_code * code, tree
 	      goto evaluate;
 
             case EXEC_ASSIGN:
-              expr1 = cnext->expr;
+              expr1 = cnext->expr1;
               expr2 = cnext->expr2;
     evaluate:
               if (nested_forall_info != NULL)
@@ -3700,10 +3700,10 @@ gfc_trans_where_3 (gfc_code * cblock, gf
   if (ompws_flags & OMPWS_WORKSHARE_FLAG)
     ompws_flags |= OMPWS_SCALARIZER_WS;
 
-  cond = cblock->expr;
-  tdst = cblock->next->expr;
+  cond = cblock->expr1;
+  tdst = cblock->next->expr1;
   tsrc = cblock->next->expr2;
-  edst = eblock ? eblock->next->expr : NULL;
+  edst = eblock ? eblock->next->expr1 : NULL;
   esrc = eblock ? eblock->next->expr2 : NULL;
 
   gfc_start_block (&block);
@@ -3839,13 +3839,13 @@ gfc_trans_where (gfc_code * code)
           /* A simple "WHERE (cond) x = y" statement or block is
 	     dependence free if cond is not dependent upon writing x,
 	     and the source y is unaffected by the destination x.  */
-	  if (!gfc_check_dependency (cblock->next->expr,
-				     cblock->expr, 0)
-	      && !gfc_check_dependency (cblock->next->expr,
+	  if (!gfc_check_dependency (cblock->next->expr1,
+				     cblock->expr1, 0)
+	      && !gfc_check_dependency (cblock->next->expr1,
 					cblock->next->expr2, 0))
 	    return gfc_trans_where_3 (cblock, NULL);
 	}
-      else if (!eblock->expr
+      else if (!eblock->expr1
 	       && !eblock->block
 	       && eblock->next
 	       && eblock->next->op == EXEC_ASSIGN
@@ -3861,22 +3861,22 @@ gfc_trans_where (gfc_code * code)
 	     are the same.  In short, this is VERY conservative and this
 	     is needed because the two loops, required by the standard
 	     are coalesced in gfc_trans_where_3.  */
-	  if (!gfc_check_dependency(cblock->next->expr,
-				    cblock->expr, 0)
-	      && !gfc_check_dependency(eblock->next->expr,
-				       cblock->expr, 0)
-	      && !gfc_check_dependency(cblock->next->expr,
+	  if (!gfc_check_dependency(cblock->next->expr1,
+				    cblock->expr1, 0)
+	      && !gfc_check_dependency(eblock->next->expr1,
+				       cblock->expr1, 0)
+	      && !gfc_check_dependency(cblock->next->expr1,
 				       eblock->next->expr2, 1)
-	      && !gfc_check_dependency(eblock->next->expr,
+	      && !gfc_check_dependency(eblock->next->expr1,
 				       cblock->next->expr2, 1)
-	      && !gfc_check_dependency(cblock->next->expr,
+	      && !gfc_check_dependency(cblock->next->expr1,
 				       cblock->next->expr2, 1)
-	      && !gfc_check_dependency(eblock->next->expr,
+	      && !gfc_check_dependency(eblock->next->expr1,
 				       eblock->next->expr2, 1)
-	      && !gfc_check_dependency(cblock->next->expr,
-				       eblock->next->expr, 0)
-	      && !gfc_check_dependency(eblock->next->expr,
-				       cblock->next->expr, 0))
+	      && !gfc_check_dependency(cblock->next->expr1,
+				       eblock->next->expr1, 0)
+	      && !gfc_check_dependency(eblock->next->expr1,
+				       cblock->next->expr1, 0))
 	    return gfc_trans_where_3 (cblock, eblock);
 	}
     }
@@ -3942,7 +3942,7 @@ gfc_trans_allocate (gfc_code * code)
   gfc_start_block (&block);
 
   /* Either STAT= and/or ERRMSG is present.  */
-  if (code->expr || code->expr2)
+  if (code->expr1 || code->expr2)
     {
       tree gfc_int4_type_node = gfc_get_int_type (4);
 
@@ -3977,7 +3977,7 @@ gfc_trans_allocate (gfc_code * code)
 			     fold_convert (TREE_TYPE (se.expr), tmp));
 	  gfc_add_expr_to_block (&se.pre, tmp);
 
-	  if (code->expr || code->expr2)
+	  if (code->expr1 || code->expr2)
 	    {
 	      tmp = build1_v (GOTO_EXPR, error_label);
 	      parm = fold_build2 (NE_EXPR, boolean_type_node,
@@ -4001,13 +4001,13 @@ gfc_trans_allocate (gfc_code * code)
     }
 
   /* STAT block.  */
-  if (code->expr)
+  if (code->expr1)
     {
       tmp = build1_v (LABEL_EXPR, error_label);
       gfc_add_expr_to_block (&block, tmp);
 
       gfc_init_se (&se, NULL);
-      gfc_conv_expr_lhs (&se, code->expr);
+      gfc_conv_expr_lhs (&se, code->expr1);
       tmp = convert (TREE_TYPE (se.expr), stat);
       gfc_add_modify (&block, se.expr, tmp);
     }
@@ -4065,7 +4065,7 @@ gfc_trans_deallocate (gfc_code *code)
   /* Count the number of failed deallocations.  If deallocate() was
      called with STAT= , then set STAT to the count.  If deallocate
      was called with ERRMSG, then set ERRMG to a string.  */
-  if (code->expr || code->expr2)
+  if (code->expr1 || code->expr2)
     {
       tree gfc_int4_type_node = gfc_get_int_type (4);
 
@@ -4126,7 +4126,7 @@ gfc_trans_deallocate (gfc_code *code)
 
       /* Keep track of the number of failed deallocations by adding stat
 	 of the last deallocation to the running total.  */
-      if (code->expr || code->expr2)
+      if (code->expr1 || code->expr2)
 	{
 	  apstat = fold_build2 (PLUS_EXPR, TREE_TYPE (stat), astat, stat);
 	  gfc_add_modify (&se.pre, astat, apstat);
@@ -4138,10 +4138,10 @@ gfc_trans_deallocate (gfc_code *code)
     }
 
   /* Set STAT.  */
-  if (code->expr)
+  if (code->expr1)
     {
       gfc_init_se (&se, NULL);
-      gfc_conv_expr_lhs (&se, code->expr);
+      gfc_conv_expr_lhs (&se, code->expr1);
       tmp = convert (TREE_TYPE (se.expr), astat);
       gfc_add_modify (&block, se.expr, tmp);
     }
Index: io.c
===================================================================
--- io.c	(revision 147131)
+++ io.c	(working copy)
@@ -2830,7 +2830,7 @@ match_io_element (io_kind k, gfc_code **
 
   cp = gfc_get_code ();
   cp->op = EXEC_TRANSFER;
-  cp->expr = expr;
+  cp->expr1 = expr;
 
   *cpp = cp;
   return MATCH_YES;
@@ -3662,7 +3662,7 @@ gfc_match_inquire (void)
 	goto syntax;
 
       new_st.op = EXEC_IOLENGTH;
-      new_st.expr = inquire->iolength;
+      new_st.expr1 = inquire->iolength;
       new_st.ext.inquire = inquire;
 
       if (gfc_pure (NULL))
Index: resolve.c
===================================================================
--- resolve.c	(revision 147131)
+++ resolve.c	(working copy)
@@ -4723,37 +4723,37 @@ success:
 /* Resolve a call to a type-bound subroutine.  */
 
 static gfc_try
-resolve_typebound_call (gfc_code* c)
+resolve_typebound_call (gfc_code *c)
 {
   gfc_actual_arglist* newactual;
   gfc_symtree* target;
 
   /* Check that's really a SUBROUTINE.  */
-  if (!c->expr->value.compcall.tbp->subroutine)
+  if (!c->expr1->value.compcall.tbp->subroutine)
     {
       gfc_error ("'%s' at %L should be a SUBROUTINE",
-		 c->expr->value.compcall.name, &c->loc);
+		 c->expr1->value.compcall.name, &c->loc);
       return FAILURE;
     }
 
-  if (check_typebound_baseobject (c->expr) == FAILURE)
+  if (check_typebound_baseobject (c->expr1) == FAILURE)
     return FAILURE;
 
-  if (resolve_typebound_generic_call (c->expr) == FAILURE)
+  if (resolve_typebound_generic_call (c->expr1) == FAILURE)
     return FAILURE;
 
   /* Transform into an ordinary EXEC_CALL for now.  */
 
-  if (resolve_typebound_static (c->expr, &target, &newactual) == FAILURE)
+  if (resolve_typebound_static (c->expr1, &target, &newactual) == FAILURE)
     return FAILURE;
 
   c->ext.actual = newactual;
   c->symtree = target;
   c->op = EXEC_CALL;
 
-  gcc_assert (!c->expr->ref && !c->expr->value.compcall.actual);
-  gfc_free_expr (c->expr);
-  c->expr = NULL;
+  gcc_assert (!c->expr1->ref && !c->expr1->value.compcall.actual);
+  gfc_free_expr (c->expr1);
+  c->expr1 = NULL;
 
   return resolve_call (c);
 }
@@ -5344,7 +5344,7 @@ resolve_allocate_expr (gfc_expr *e, gfc_
       init_st = gfc_get_code ();
       init_st->loc = code->loc;
       init_st->op = EXEC_INIT_ASSIGN;
-      init_st->expr = expr_to_initialize (e);
+      init_st->expr1 = expr_to_initialize (e);
       init_st->expr2 = init_e;
       init_st->next = code->next;
       code->next = init_st;
@@ -5424,7 +5424,7 @@ resolve_allocate_deallocate (gfc_code *c
   gfc_expr *stat, *errmsg, *pe, *qe;
   gfc_alloc *a, *p, *q;
 
-  stat = code->expr ? code->expr : NULL;
+  stat = code->expr1 ? code->expr1 : NULL;
 
   errmsg = code->expr2 ? code->expr2 : NULL;
 
@@ -5775,7 +5775,7 @@ resolve_select (gfc_code *code)
   bt type;
   gfc_try t;
 
-  if (code->expr == NULL)
+  if (code->expr1 == NULL)
     {
       /* This was actually a computed GOTO statement.  */
       case_expr = code->expr2;
@@ -5788,12 +5788,12 @@ resolve_select (gfc_code *code)
 	 by the compiler, so it should always be OK.  Just move the
 	 case_expr from expr2 to expr so that we can handle computed
 	 GOTOs as normal SELECTs from here on.  */
-      code->expr = code->expr2;
+      code->expr1 = code->expr2;
       code->expr2 = NULL;
       return;
     }
 
-  case_expr = code->expr;
+  case_expr = code->expr1;
 
   type = case_expr->ts.type;
   if (type != BT_LOGICAL && type != BT_INTEGER && type != BT_CHARACTER)
@@ -6046,7 +6046,7 @@ resolve_transfer (gfc_code *code)
   gfc_ref *ref;
   gfc_expr *exp;
 
-  exp = code->expr;
+  exp = code->expr1;
 
   if (exp->expr_type != EXPR_VARIABLE && exp->expr_type != EXPR_FUNCTION)
     return;
@@ -6055,7 +6055,7 @@ resolve_transfer (gfc_code *code)
   ts = &sym->ts;
 
   /* Go to actual component transferred.  */
-  for (ref = code->expr->ref; ref; ref = ref->next)
+  for (ref = code->expr1->ref; ref; ref = ref->next)
     if (ref->type == REF_COMPONENT)
       ts = &ref->u.c.component->ts;
 
@@ -6251,19 +6251,19 @@ resolve_where (gfc_code *code, gfc_expr 
   /* Store the first WHERE mask-expr of the WHERE statement or construct.
      In case of nested WHERE, only the outmost one is stored.  */
   if (mask == NULL) /* outmost WHERE */
-    e = cblock->expr;
+    e = cblock->expr1;
   else /* inner WHERE */
     e = mask;
 
   while (cblock)
     {
-      if (cblock->expr)
+      if (cblock->expr1)
 	{
 	  /* Check if the mask-expr has a consistent shape with the
 	     outmost WHERE mask-expr.  */
-	  if (resolve_where_shape (cblock->expr, e) == FAILURE)
+	  if (resolve_where_shape (cblock->expr1, e) == FAILURE)
 	    gfc_error ("WHERE mask at %L has inconsistent shape",
-		       &cblock->expr->where);
+		       &cblock->expr1->where);
 	 }
 
       /* the assignment statement of a WHERE statement, or the first
@@ -6277,9 +6277,9 @@ resolve_where (gfc_code *code, gfc_expr 
 	    case EXEC_ASSIGN:
 
 	      /* Check shape consistent for WHERE assignment target.  */
-	      if (e && resolve_where_shape (cnext->expr, e) == FAILURE)
+	      if (e && resolve_where_shape (cnext->expr1, e) == FAILURE)
 	       gfc_error ("WHERE assignment target at %L has "
-			  "inconsistent shape", &cnext->expr->where);
+			  "inconsistent shape", &cnext->expr1->where);
 	      break;
 
   
@@ -6325,21 +6325,21 @@ gfc_resolve_assign_in_forall (gfc_code *
 
       /* Check whether the assignment target is one of the FORALL index
 	 variable.  */
-      if ((code->expr->expr_type == EXPR_VARIABLE)
-	  && (code->expr->symtree->n.sym == forall_index))
+      if ((code->expr1->expr_type == EXPR_VARIABLE)
+	  && (code->expr1->symtree->n.sym == forall_index))
 	gfc_error ("Assignment to a FORALL index variable at %L",
-		   &code->expr->where);
+		   &code->expr1->where);
       else
 	{
 	  /* If one of the FORALL index variables doesn't appear in the
 	     assignment variable, then there could be a many-to-one
 	     assignment.  Emit a warning rather than an error because the
 	     mask could be resolving this problem.  */
-	  if (find_forall_index (code->expr, forall_index, 0) == FAILURE)
+	  if (find_forall_index (code->expr1, forall_index, 0) == FAILURE)
 	    gfc_warning ("The FORALL with index '%s' is not used on the "
 			 "left side of the assignment at %L and so might "
 			 "cause multiple assignment to this object",
-			 var_expr[n]->symtree->name, &code->expr->where);
+			 var_expr[n]->symtree->name, &code->expr1->where);
 	}
     }
 }
@@ -6555,29 +6555,29 @@ gfc_resolve_blocks (gfc_code *b, gfc_nam
 
   for (; b; b = b->block)
     {
-      t = gfc_resolve_expr (b->expr);
+      t = gfc_resolve_expr (b->expr1);
       if (gfc_resolve_expr (b->expr2) == FAILURE)
 	t = FAILURE;
 
       switch (b->op)
 	{
 	case EXEC_IF:
-	  if (t == SUCCESS && b->expr != NULL
-	      && (b->expr->ts.type != BT_LOGICAL || b->expr->rank != 0))
+	  if (t == SUCCESS && b->expr1 != NULL
+	      && (b->expr1->ts.type != BT_LOGICAL || b->expr1->rank != 0))
 	    gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
-		       &b->expr->where);
+		       &b->expr1->where);
 	  break;
 
 	case EXEC_WHERE:
 	  if (t == SUCCESS
-	      && b->expr != NULL
-	      && (b->expr->ts.type != BT_LOGICAL || b->expr->rank == 0))
+	      && b->expr1 != NULL
+	      && (b->expr1->ts.type != BT_LOGICAL || b->expr1->rank == 0))
 	    gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
-		       &b->expr->where);
+		       &b->expr1->where);
 	  break;
 
 	case EXEC_GOTO:
-	  resolve_branch (b->label, b);
+	  resolve_branch (b->label1, b);
 	  break;
 
 	case EXEC_SELECT:
@@ -6651,7 +6651,7 @@ resolve_ordinary_assign (gfc_code *code,
       return true;
     }
 
-  lhs = code->expr;
+  lhs = code->expr1;
   rhs = code->expr2;
 
   if (rhs->is_boz
@@ -6820,7 +6820,7 @@ resolve_code (gfc_code *code, gfc_namesp
 
       t = SUCCESS;
       if (code->op != EXEC_COMPCALL)
-	t = gfc_resolve_expr (code->expr);
+	t = gfc_resolve_expr (code->expr1);
       forall_flag = forall_save;
 
       if (gfc_resolve_expr (code->expr2) == FAILURE)
@@ -6848,25 +6848,25 @@ resolve_code (gfc_code *code, gfc_namesp
 	  break;
 
 	case EXEC_GOTO:
-	  if (code->expr != NULL)
+	  if (code->expr1 != NULL)
 	    {
-	      if (code->expr->ts.type != BT_INTEGER)
+	      if (code->expr1->ts.type != BT_INTEGER)
 		gfc_error ("ASSIGNED GOTO statement at %L requires an "
-			   "INTEGER variable", &code->expr->where);
-	      else if (code->expr->symtree->n.sym->attr.assign != 1)
+			   "INTEGER variable", &code->expr1->where);
+	      else if (code->expr1->symtree->n.sym->attr.assign != 1)
 		gfc_error ("Variable '%s' has not been assigned a target "
-			   "label at %L", code->expr->symtree->n.sym->name,
-			   &code->expr->where);
+			   "label at %L", code->expr1->symtree->n.sym->name,
+			   &code->expr1->where);
 	    }
 	  else
-	    resolve_branch (code->label, code);
+	    resolve_branch (code->label1, code);
 	  break;
 
 	case EXEC_RETURN:
-	  if (code->expr != NULL
-		&& (code->expr->ts.type != BT_INTEGER || code->expr->rank))
+	  if (code->expr1 != NULL
+		&& (code->expr1->ts.type != BT_INTEGER || code->expr1->rank))
 	    gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
-		       "INTEGER return specifier", &code->expr->where);
+		       "INTEGER return specifier", &code->expr1->where);
 	  break;
 
 	case EXEC_INIT_ASSIGN:
@@ -6882,44 +6882,44 @@ resolve_code (gfc_code *code, gfc_namesp
 	  break;
 
 	case EXEC_LABEL_ASSIGN:
-	  if (code->label->defined == ST_LABEL_UNKNOWN)
+	  if (code->label1->defined == ST_LABEL_UNKNOWN)
 	    gfc_error ("Label %d referenced at %L is never defined",
-		       code->label->value, &code->label->where);
+		       code->label1->value, &code->label1->where);
 	  if (t == SUCCESS
-	      && (code->expr->expr_type != EXPR_VARIABLE
-		  || code->expr->symtree->n.sym->ts.type != BT_INTEGER
-		  || code->expr->symtree->n.sym->ts.kind
+	      && (code->expr1->expr_type != EXPR_VARIABLE
+		  || code->expr1->symtree->n.sym->ts.type != BT_INTEGER
+		  || code->expr1->symtree->n.sym->ts.kind
 		     != gfc_default_integer_kind
-		  || code->expr->symtree->n.sym->as != NULL))
+		  || code->expr1->symtree->n.sym->as != NULL))
 	    gfc_error ("ASSIGN statement at %L requires a scalar "
-		       "default INTEGER variable", &code->expr->where);
+		       "default INTEGER variable", &code->expr1->where);
 	  break;
 
 	case EXEC_POINTER_ASSIGN:
 	  if (t == FAILURE)
 	    break;
 
-	  gfc_check_pointer_assign (code->expr, code->expr2);
+	  gfc_check_pointer_assign (code->expr1, code->expr2);
 	  break;
 
 	case EXEC_ARITHMETIC_IF:
 	  if (t == SUCCESS
-	      && code->expr->ts.type != BT_INTEGER
-	      && code->expr->ts.type != BT_REAL)
+	      && code->expr1->ts.type != BT_INTEGER
+	      && code->expr1->ts.type != BT_REAL)
 	    gfc_error ("Arithmetic IF statement at %L requires a numeric "
-		       "expression", &code->expr->where);
+		       "expression", &code->expr1->where);
 
-	  resolve_branch (code->label, code);
+	  resolve_branch (code->label1, code);
 	  resolve_branch (code->label2, code);
 	  resolve_branch (code->label3, code);
 	  break;
 
 	case EXEC_IF:
-	  if (t == SUCCESS && code->expr != NULL
-	      && (code->expr->ts.type != BT_LOGICAL
-		  || code->expr->rank != 0))
+	  if (t == SUCCESS && code->expr1 != NULL
+	      && (code->expr1->ts.type != BT_LOGICAL
+		  || code->expr1->rank != 0))
 	    gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
-		       &code->expr->where);
+		       &code->expr1->where);
 	  break;
 
 	case EXEC_CALL:
@@ -6947,13 +6947,13 @@ resolve_code (gfc_code *code, gfc_namesp
 	  break;
 
 	case EXEC_DO_WHILE:
-	  if (code->expr == NULL)
+	  if (code->expr1 == NULL)
 	    gfc_internal_error ("resolve_code(): No expression on DO WHILE");
 	  if (t == SUCCESS
-	      && (code->expr->rank != 0
-		  || code->expr->ts.type != BT_LOGICAL))
+	      && (code->expr1->rank != 0
+		  || code->expr1->ts.type != BT_LOGICAL))
 	    gfc_error ("Exit condition of DO WHILE loop at %L must be "
-		       "a scalar LOGICAL expression", &code->expr->where);
+		       "a scalar LOGICAL expression", &code->expr1->where);
 	  break;
 
 	case EXEC_ALLOCATE:
@@ -7033,9 +7033,9 @@ resolve_code (gfc_code *code, gfc_namesp
 	case EXEC_FORALL:
 	  resolve_forall_iterators (code->ext.forall_iterator);
 
-	  if (code->expr != NULL && code->expr->ts.type != BT_LOGICAL)
+	  if (code->expr1 != NULL && code->expr1->ts.type != BT_LOGICAL)
 	    gfc_error ("FORALL mask clause at %L requires a LOGICAL "
-		       "expression", &code->expr->where);
+		       "expression", &code->expr1->where);
 	  break;
 
 	case EXEC_OMP_ATOMIC:
@@ -7406,7 +7406,7 @@ build_init_assign (gfc_symbol *sym, gfc_
   /* Assign the default initializer to the l-value.  */
   init_st->loc = sym->declared_at;
   init_st->op = EXEC_INIT_ASSIGN;
-  init_st->expr = lval;
+  init_st->expr1 = lval;
   init_st->expr2 = init;
 }
 
Index: st.c
===================================================================
--- st.c	(revision 147131)
+++ st.c	(working copy)
@@ -80,8 +80,8 @@ gfc_append_code (gfc_code *tail, gfc_cod
 void
 gfc_free_statement (gfc_code *p)
 {
-  if (p->expr)
-    gfc_free_expr (p->expr);
+  if (p->expr1)
+    gfc_free_expr (p->expr1);
   if (p->expr2)
     gfc_free_expr (p->expr2);
 
Index: trans-io.c
===================================================================
--- trans-io.c	(revision 147131)
+++ trans-io.c	(working copy)
@@ -2149,7 +2149,7 @@ gfc_trans_transfer (gfc_code * code)
   gfc_start_block (&block);
   gfc_init_block (&body);
 
-  expr = code->expr;
+  expr = code->expr1;
   ss = gfc_walk_expr (expr);
 
   ref = NULL;
@@ -2209,7 +2209,7 @@ gfc_trans_transfer (gfc_code * code)
 
       /* Initialize the loop.  */
       gfc_conv_ss_startstride (&loop);
-      gfc_conv_loop_setup (&loop, &code->expr->where);
+      gfc_conv_loop_setup (&loop, &code->expr1->where);
 
       /* The main loop body.  */
       gfc_mark_ss_chain_used (ss, 1);
Index: match.c
===================================================================
--- match.c	(revision 147131)
+++ match.c	(working copy)
@@ -1306,7 +1306,7 @@ gfc_match_assignment (void)
   gfc_set_sym_referenced (lvalue->symtree->n.sym);
 
   new_st.op = EXEC_ASSIGN;
-  new_st.expr = lvalue;
+  new_st.expr1 = lvalue;
   new_st.expr2 = rvalue;
 
   gfc_check_do_variable (lvalue->symtree);
@@ -1345,7 +1345,7 @@ gfc_match_pointer_assignment (void)
     goto cleanup;
 
   new_st.op = EXEC_POINTER_ASSIGN;
-  new_st.expr = lvalue;
+  new_st.expr1 = lvalue;
   new_st.expr2 = rvalue;
 
   return MATCH_YES;
@@ -1387,8 +1387,8 @@ match_arithmetic_if (void)
     return MATCH_ERROR;
 
   new_st.op = EXEC_ARITHMETIC_IF;
-  new_st.expr = expr;
-  new_st.label = l1;
+  new_st.expr1 = expr;
+  new_st.label1 = l1;
   new_st.label2 = l2;
   new_st.label3 = l3;
 
@@ -1468,8 +1468,8 @@ gfc_match_if (gfc_statement *if_type)
 	return MATCH_ERROR;
 
       new_st.op = EXEC_ARITHMETIC_IF;
-      new_st.expr = expr;
-      new_st.label = l1;
+      new_st.expr1 = expr;
+      new_st.label1 = l1;
       new_st.label2 = l2;
       new_st.label3 = l3;
 
@@ -1480,7 +1480,7 @@ gfc_match_if (gfc_statement *if_type)
   if (gfc_match (" then%t") == MATCH_YES)
     {
       new_st.op = EXEC_IF;
-      new_st.expr = expr;
+      new_st.expr1 = expr;
       *if_type = ST_IF_BLOCK;
       return MATCH_YES;
     }
@@ -1600,7 +1600,7 @@ got_match:
   *p->next = new_st;
   p->next->loc = gfc_current_locus;
 
-  p->expr = expr;
+  p->expr1 = expr;
   p->op = EXEC_IF;
 
   gfc_clear_new_st ();
@@ -1676,7 +1676,7 @@ gfc_match_elseif (void)
 
 done:
   new_st.op = EXEC_IF;
-  new_st.expr = expr;
+  new_st.expr1 = expr;
   return MATCH_YES;
 
 cleanup:
@@ -1788,10 +1788,10 @@ done:
       && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE)
     goto cleanup;
 
-  new_st.label = label;
+  new_st.label1 = label;
 
   if (new_st.op == EXEC_DO_WHILE)
-    new_st.expr = iter.end;
+    new_st.expr1 = iter.end;
   else
     {
       new_st.ext.iterator = ip = gfc_get_iterator ();
@@ -1951,7 +1951,7 @@ gfc_match_stopcode (gfc_statement st)
     }
 
   new_st.op = st == ST_STOP ? EXEC_STOP : EXEC_PAUSE;
-  new_st.expr = e;
+  new_st.expr1 = e;
   new_st.ext.stop_code = stop_code;
 
   return MATCH_YES;
@@ -2032,8 +2032,8 @@ gfc_match_assign (void)
 	  expr->symtree->n.sym->attr.assign = 1;
 
 	  new_st.op = EXEC_LABEL_ASSIGN;
-	  new_st.label = label;
-	  new_st.expr = expr;
+	  new_st.label1 = label;
+	  new_st.expr1 = expr;
 	  return MATCH_YES;
 	}
     }
@@ -2062,7 +2062,7 @@ gfc_match_goto (void)
 	return MATCH_ERROR;
 
       new_st.op = EXEC_GOTO;
-      new_st.label = label;
+      new_st.label1 = label;
       return MATCH_YES;
     }
 
@@ -2076,7 +2076,7 @@ gfc_match_goto (void)
 	return MATCH_ERROR;
 
       new_st.op = EXEC_GOTO;
-      new_st.expr = expr;
+      new_st.expr1 = expr;
 
       if (gfc_match_eos () == MATCH_YES)
 	return MATCH_YES;
@@ -2107,7 +2107,7 @@ gfc_match_goto (void)
 	      tail = tail->block;
 	    }
 
-	  tail->label = label;
+	  tail->label1 = label;
 	  tail->op = EXEC_GOTO;
 	}
       while (gfc_match_char (',') == MATCH_YES);
@@ -2160,7 +2160,7 @@ gfc_match_goto (void)
 
       tail->next = gfc_get_code ();
       tail->next->op = EXEC_GOTO;
-      tail->next->label = label;
+      tail->next->label1 = label;
     }
   while (gfc_match_char (',') == MATCH_YES);
 
@@ -2183,7 +2183,7 @@ gfc_match_goto (void)
      equivalent SELECT statement constructed.  */
 
   new_st.op = EXEC_SELECT;
-  new_st.expr = NULL;
+  new_st.expr1 = NULL;
 
   /* Hack: For a "real" SELECT, the expression is in expr. We put
      it in expr2 so we can distinguish then and produce the correct
@@ -2336,7 +2336,7 @@ alloc_opt_list:
     goto syntax;
 
   new_st.op = EXEC_ALLOCATE;
-  new_st.expr = stat;
+  new_st.expr1 = stat;
   new_st.expr2 = errmsg;
   new_st.ext.alloc_list = head;
 
@@ -2401,7 +2401,7 @@ gfc_match_nullify (void)
 	}
 
       tail->op = EXEC_POINTER_ASSIGN;
-      tail->expr = p;
+      tail->expr1 = p;
       tail->expr2 = e;
 
       if (gfc_match (" )%t") == MATCH_YES)
@@ -2537,7 +2537,7 @@ dealloc_opt_list:
     goto syntax;
 
   new_st.op = EXEC_DEALLOCATE;
-  new_st.expr = stat;
+  new_st.expr1 = stat;
   new_st.expr2 = errmsg;
   new_st.ext.alloc_list = head;
 
@@ -2605,7 +2605,7 @@ done:
       return MATCH_ERROR;
 
   new_st.op = EXEC_RETURN;
-  new_st.expr = e;
+  new_st.expr1 = e;
 
   return MATCH_YES;
 }
@@ -2648,7 +2648,7 @@ match_typebound_call (gfc_symtree* varst
     }
 
   new_st.op = EXEC_COMPCALL;
-  new_st.expr = base;
+  new_st.expr1 = base;
 
   return MATCH_YES;
 }
@@ -2751,11 +2751,11 @@ gfc_match_call (void)
       select_sym->ts.type = BT_INTEGER;
       select_sym->ts.kind = gfc_default_integer_kind;
       gfc_set_sym_referenced (select_sym);
-      c->expr = gfc_get_expr ();
-      c->expr->expr_type = EXPR_VARIABLE;
-      c->expr->symtree = select_st;
-      c->expr->ts = select_sym->ts;
-      c->expr->where = gfc_current_locus;
+      c->expr1 = gfc_get_expr ();
+      c->expr1->expr_type = EXPR_VARIABLE;
+      c->expr1->symtree = select_st;
+      c->expr1->ts = select_sym->ts;
+      c->expr1->where = gfc_current_locus;
 
       i = 0;
       for (a = arglist; a; a = a->next)
@@ -2778,7 +2778,7 @@ gfc_match_call (void)
 
 	  c->next = gfc_get_code ();
 	  c->next->op = EXEC_GOTO;
-	  c->next->label = a->label;
+	  c->next->label1 = a->label;
 	}
     }
 
@@ -3651,7 +3651,7 @@ gfc_match_select (void)
     return m;
 
   new_st.op = EXEC_SELECT;
-  new_st.expr = expr;
+  new_st.expr1 = expr;
 
   return MATCH_YES;
 }
@@ -3756,7 +3756,7 @@ match_simple_where (void)
   c = gfc_get_code ();
 
   c->op = EXEC_WHERE;
-  c->expr = expr;
+  c->expr1 = expr;
   c->next = gfc_get_code ();
 
   *c->next = new_st;
@@ -3797,7 +3797,7 @@ gfc_match_where (gfc_statement *st)
     {
       *st = ST_WHERE_BLOCK;
       new_st.op = EXEC_WHERE;
-      new_st.expr = expr;
+      new_st.expr1 = expr;
       return MATCH_YES;
     }
 
@@ -3816,7 +3816,7 @@ gfc_match_where (gfc_statement *st)
   c = gfc_get_code ();
 
   c->op = EXEC_WHERE;
-  c->expr = expr;
+  c->expr1 = expr;
   c->next = gfc_get_code ();
 
   *c->next = new_st;
@@ -3886,7 +3886,7 @@ gfc_match_elsewhere (void)
     }
 
   new_st.op = EXEC_WHERE;
-  new_st.expr = expr;
+  new_st.expr1 = expr;
   return MATCH_YES;
 
 syntax:
@@ -4103,7 +4103,7 @@ match_simple_forall (void)
 
   gfc_clear_new_st ();
   new_st.op = EXEC_FORALL;
-  new_st.expr = mask;
+  new_st.expr1 = mask;
   new_st.ext.forall_iterator = head;
   new_st.block = gfc_get_code ();
 
@@ -4155,7 +4155,7 @@ gfc_match_forall (gfc_statement *st)
     {
       *st = ST_FORALL_BLOCK;
       new_st.op = EXEC_FORALL;
-      new_st.expr = mask;
+      new_st.expr1 = mask;
       new_st.ext.forall_iterator = head;
       return MATCH_YES;
     }
@@ -4178,7 +4178,7 @@ gfc_match_forall (gfc_statement *st)
 
   gfc_clear_new_st ();
   new_st.op = EXEC_FORALL;
-  new_st.expr = mask;
+  new_st.expr1 = mask;
   new_st.ext.forall_iterator = head;
   new_st.block = gfc_get_code ();
   new_st.block->op = EXEC_FORALL;
Index: parse.c
===================================================================
--- parse.c	(revision 147131)
+++ parse.c	(working copy)
@@ -2494,10 +2494,10 @@ parse_where_block (void)
   push_state (&s, COMP_WHERE, gfc_new_block);
 
   d = add_statement ();
-  d->expr = top->expr;
+  d->expr1 = top->expr1;
   d->op = EXEC_WHERE;
 
-  top->expr = NULL;
+  top->expr1 = NULL;
   top->block = d;
 
   seen_empty_else = 0;
@@ -2527,12 +2527,12 @@ parse_where_block (void)
 	      break;
 	    }
 
-	  if (new_st.expr == NULL)
+	  if (new_st.expr1 == NULL)
 	    seen_empty_else = 1;
 
 	  d = new_level (gfc_state_stack->head);
 	  d->op = EXEC_WHERE;
-	  d->expr = new_st.expr;
+	  d->expr1 = new_st.expr1;
 
 	  accept_statement (st);
 
@@ -2637,8 +2637,8 @@ parse_if_block (void)
   new_st.op = EXEC_IF;
   d = add_statement ();
 
-  d->expr = top->expr;
-  top->expr = NULL;
+  d->expr1 = top->expr1;
+  top->expr1 = NULL;
   top->block = d;
 
   do
@@ -2662,7 +2662,7 @@ parse_if_block (void)
 
 	  d = new_level (gfc_state_stack->head);
 	  d->op = EXEC_IF;
-	  d->expr = new_st.expr;
+	  d->expr1 = new_st.expr1;
 
 	  accept_statement (st);
 
@@ -2853,7 +2853,7 @@ parse_do_block (void)
   gfc_state_data s;
   gfc_symtree *stree;
 
-  s.ext.end_do_label = new_st.label;
+  s.ext.end_do_label = new_st.label1;
 
   if (new_st.ext.iterator != NULL)
     stree = new_st.ext.iterator->var->symtree;

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