fold-const.c (fold_build1, [...]): New.

	* fold-const.c (fold_build1, fold_build2, fold_build3): New.
	* tree.h: Add corresponding prototypes.

From-SVN: r96881

gcc/ChangeLog

@@ -4,6 +4,9 @@
 	CALL_EXPR.
 	(fold): Update a call to fold_ternary.
 
+	* fold-const.c (fold_build1, fold_build2, fold_build3): New.
+	* tree.h: Add corresponding prototypes.
+
 2005-03-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/20561

gcc/fold-const.c

@@ -10168,6 +10168,51 @@ fold_checksum_tree (tree expr, struct md5_ctx *ctx, htab_t ht)
 
 #endif
 
+/* Fold a unary tree expression with code CODE of type TYPE with an
+   operand OP0.  Return a folded expresion if successful.  Otherwise,
+   return a tree expression with code CODE of type TYPE with an
+   operand OP0.  */
+
+tree
+fold_build1 (enum tree_code code, tree type, tree op0)
+{
+  tree tem = fold_unary (code, type, op0);
+  if (tem)
+    return tem;
+
+  return build1 (code, type, op0);
+}
+
+/* Fold a binary tree expression with code CODE of type TYPE with
+   operands OP0 and OP1.  Return a folded expresion if successful.
+   Otherwise, return a tree expression with code CODE of type TYPE
+   with operands OP0 and OP1.  */
+
+tree
+fold_build2 (enum tree_code code, tree type, tree op0, tree op1)
+{
+  tree tem = fold_binary (code, type, op0, op1);
+  if (tem)
+    return tem;
+
+  return build2 (code, type, op0, op1);
+}
+
+/* Fold a ternary tree expression with code CODE of type TYPE with
+   operands OP0, OP1, and OP2.  Return a folded expresion if
+   successful.  Otherwise, return a tree expression with code CODE of
+   type TYPE with operands OP0, OP1, and OP2.  */
+
+tree
+fold_build3 (enum tree_code code, tree type, tree op0, tree op1, tree op2)
+{
+  tree tem = fold_ternary (code, type, op0, op1, op2);
+  if (tem)
+    return tem;
+
+  return build3 (code, type, op0, op1, op2);
+}
+
 /* Perform constant folding and related simplification of initializer
    expression EXPR.  This behaves identically to "fold" but ignores
    potential run-time traps and exceptions that fold must preserve.  */

gcc/tree.h

@@ -3495,6 +3495,9 @@ extern void using_eh_for_cleanups (void);
    subexpressions are not changed.  */
 
 extern tree fold (tree);
+extern tree fold_build1 (enum tree_code, tree, tree);
+extern tree fold_build2 (enum tree_code, tree, tree, tree);
+extern tree fold_build3 (enum tree_code, tree, tree, tree, tree);
 extern tree fold_initializer (tree);
 extern tree fold_convert (tree, tree);
 extern tree fold_single_bit_test (enum tree_code, tree, tree, tree);