diff graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/FunctionBodyNode.java @ 12752:71991b7a0f14

SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
author Christian Humer <christian.humer@gmail.com>
date Mon, 11 Nov 2013 21:34:44 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/FunctionBodyNode.java	Mon Nov 11 21:34:44 2013 +0100
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.sl.nodes;
+
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+
+public class FunctionBodyNode extends TypedNode {
+
+    @Child private StatementNode body;
+    @Child private TypedNode returnValue;
+    @Child private StatementNode writeArguments;
+
+    private FrameDescriptor frameDescriptor;
+
+    public FunctionBodyNode(FrameDescriptor frameDescriptor, StatementNode body, TypedNode returnValue, String[] parameterNames) {
+        this.frameDescriptor = frameDescriptor;
+        this.body = adoptChild(body);
+        this.returnValue = adoptChild(returnValue);
+        this.writeArguments = adoptChild(new BlockNode(createWriteArguments(parameterNames)));
+    }
+
+    @Override
+    public Object executeGeneric(VirtualFrame frame) {
+        writeArguments.executeVoid(frame);
+        try {
+            body.executeVoid(frame);
+        } catch (ReturnException ex) {
+            // Nothing to do, we just need to return.
+        }
+        if (returnValue != null) {
+            return returnValue.executeGeneric(frame);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public Node copy() {
+        FunctionBodyNode copy = (FunctionBodyNode) super.copy();
+        copy.frameDescriptor = frameDescriptor.shallowCopy();
+        return copy;
+    }
+
+    private StatementNode[] createWriteArguments(String[] parameterNames) {
+        StatementNode[] writeNodes = new StatementNode[parameterNames.length];
+        for (int i = 0; i < parameterNames.length; i++) {
+            FrameSlot frameSlot = frameDescriptor.findOrAddFrameSlot(parameterNames[i]);
+            writeNodes[i] = WriteLocalNodeFactory.create(frameSlot, new ReadArgumentNode(i));
+        }
+        return writeNodes;
+    }
+
+    public FrameDescriptor getFrameDescriptor() {
+        return frameDescriptor;
+    }
+
+}