tree.def (LABELED_BLOCK_EXPR, [...]): New tree nodes.

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	* tree.def (LABELED_BLOCK_EXPR, EXIT_BLOCK_EXPR): New tree nodes.
  	* tree.h (LABELED_BLOCK_LABEL, LABELED_BLOCK_BODY,
 	EXIT_BLOCK_LABELED_BLOCK, EXIT_BLOCK_RETURN, LOOP_EXPR_BODY): New
 	macros.
	* expr.c (expand_expr): Handle LABELED_BLOCK_EXPR and
 	EXIT_BLOCK_EXPR.

From-SVN: r21895

gcc/tree.h

@@ -688,6 +688,17 @@ struct tree_vec
 #define TREE_OPERAND(NODE, I) (EXPR_CHECK (NODE)->exp.operands[I])
 #define TREE_COMPLEXITY(NODE) (EXPR_CHECK (NODE)->exp.complexity)
 
+/* In a LABELED_BLOCK_EXPR node.  */
+#define LABELED_BLOCK_LABEL(NODE) TREE_OPERAND (NODE, 0)
+#define LABELED_BLOCK_BODY(NODE) TREE_OPERAND (NODE, 1)
+
+/* In a EXIT_BLOCK_EXPR node.  */
+#define EXIT_BLOCK_LABELED_BLOCK(NODE) TREE_OPERAND (NODE, 0)
+#define EXIT_BLOCK_RETURN(NODE) TREE_OPERAND (NODE, 1)
+
+/* In a LOOP_EXPR node.  */
+#define LOOP_EXPR_BODY(NODE) TREE_OPERAND (NODE, 0)
+
 /* In a EXPR_WITH_FILE_LOCATION node.  */
 #define EXPR_WFL_NODE(NODE) TREE_OPERAND((NODE), 0)
 #define EXPR_WFL_FILENAME(NODE) (IDENTIFIER_POINTER ((NODE)->common.chain))