--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.cri/src/com/sun/cri/xir/XirSnippet.java	Sat Dec 17 19:59:18 2011 +0100
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2009, 2011, 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.sun.cri.xir;
+
+import java.util.*;
+
+import com.sun.cri.ci.*;
+import com.sun.cri.ci.CiTargetMethod.Mark;
+import com.sun.cri.xir.CiXirAssembler.*;
+
+/**
+ * Represents a {@link XirTemplate template of XIR} along with the {@link XirArgument arguments} to be passed to the
+ * template. The runtime generates such snippets for each bytecode being compiled at the request of the compiler, and
+ * the compiler can generate machine code for the XIR snippet.
+ */
+public class XirSnippet {
+
+    public final XirArgument[] arguments;
+    public final XirTemplate template;
+    public final Map<XirMark, Mark> marks;
+
+    public XirSnippet(XirTemplate template, XirArgument... inputs) {
+        assert template != null;
+        this.template = template;
+        this.arguments = inputs;
+        this.marks = (template.marks != null && template.marks.length > 0) ? new HashMap<XirMark, Mark>() : null;
+        assert assertArgumentsCorrect();
+    }
+
+    private boolean assertArgumentsCorrect() {
+        int argLength = arguments == null ? 0 : arguments.length;
+        int paramLength = template.parameters == null ? 0 : template.parameters.length;
+        assert argLength == paramLength : "expected param count: " + paramLength + ", actual: " + argLength;
+        for (int i = 0; i < arguments.length; i++) {
+            assert assertArgumentCorrect(template.parameters[i], arguments[i]) : "mismatch in parameter " + i + ": " + arguments[i] + " instead of " + template.parameters[i];
+        }
+        return true;
+    }
+
+    private boolean assertArgumentCorrect(XirParameter param, XirArgument arg) {
+        if (param.kind == CiKind.Illegal || param.kind == CiKind.Void) {
+            if (arg != null) {
+                return false;
+            }
+        } else {
+            if (arg == null) {
+                return false;
+            }
+            if (arg.constant != null) {
+                if (arg.constant != null && arg.constant.kind != param.kind) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+
+        StringBuffer sb = new StringBuffer();
+
+        sb.append(template.toString());
+        sb.append("(");
+        for (XirArgument a : arguments) {
+            sb.append(" ");
+            sb.append(a);
+        }
+
+        sb.append(" )");
+
+        return sb.toString();
+    }
+}