# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1425037462 -3600
# Node ID 05e8c7567fab70b0702fd847c2310de04d12c810
# Parent  4c84fb99a850ccff571290778080f22eddbfc2b3
Add basic bytecode interpreter partial evaluation test.

diff -r 4c84fb99a850 -r 05e8c7567fab graal/com.oracle.graal.truffle.test/src/com/oracle/graal/truffle/test/BytecodeInterpreterPartialEvaluationTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.truffle.test/src/com/oracle/graal/truffle/test/BytecodeInterpreterPartialEvaluationTest.java	Fri Feb 27 12:44:22 2015 +0100
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2015, 2015, 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.graal.truffle.test;
+
+import org.junit.*;
+
+import com.oracle.graal.truffle.test.nodes.*;
+import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+
+public class BytecodeInterpreterPartialEvaluationTest extends PartialEvaluationTest {
+
+    public static class Bytecode {
+        public static final byte CONST = 0;
+        public static final byte RETURN = 1;
+    }
+
+    public static class Program extends RootNode {
+        @CompilationFinal final byte[] bytecodes;
+        private final int maxStack;
+        private final int maxLocals;
+        @CompilationFinal private final FrameSlot[] locals;
+        @CompilationFinal private final FrameSlot[] stack;
+
+        public Program(byte[] bytecodes, int maxLocals, int maxStack) {
+            this.bytecodes = bytecodes;
+            this.maxLocals = maxLocals;
+            this.maxStack = maxStack;
+            locals = new FrameSlot[maxLocals];
+            stack = new FrameSlot[maxStack];
+            for (int i = 0; i < maxLocals; ++i) {
+                locals[i] = this.getFrameDescriptor().addFrameSlot("local" + i);
+                locals[i].setKind(FrameSlotKind.Int);
+            }
+            for (int i = 0; i < maxStack; ++i) {
+                stack[i] = this.getFrameDescriptor().addFrameSlot("stack" + i);
+                stack[i].setKind(FrameSlotKind.Int);
+            }
+        }
+
+        @Override
+        @ExplodeLoop
+        public Object execute(VirtualFrame frame) {
+            int topOfStack = -1;
+            int bci = 0;
+
+            while (true) {
+                byte bc = bytecodes[bci];
+                byte value = 0;
+                switch (bc) {
+                    case Bytecode.CONST:
+                        value = bytecodes[bci + 1];
+                        topOfStack = topOfStack + 1;
+                        frame.setInt(stack[topOfStack], value);
+                        bci = bci + 2;
+                        break;
+                    case Bytecode.RETURN:
+                        return frame.getValue(stack[topOfStack]);
+                }
+            }
+        }
+    }
+
+    public static Object constant42() {
+        return 42;
+    }
+
+    @Test
+    public void simpleProgram() {
+        FrameDescriptor fd = new FrameDescriptor();
+        byte[] bytecodes = new byte[]{Bytecode.CONST, 42, Bytecode.RETURN};
+        assertPartialEvalEquals("constant42", new Program(bytecodes, 0, 2));
+    }
+}