--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/debug/InstructionPrinter.java	Wed Apr 27 11:50:44 2011 +0200
@@ -0,0 +1,154 @@
+/*
+ * 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.c1x.debug;
+
+import static com.sun.c1x.debug.InstructionPrinter.InstructionLineColumn.*;
+
+import com.sun.c1x.ir.*;
+
+/**
+ * A {@link ValueVisitor} for {@linkplain #printInstruction(Value) printing}
+ * an {@link Instruction} as an expression or statement.
+ *
+ * @author Doug Simon
+ */
+public class InstructionPrinter {
+
+
+    /**
+     * The columns printed in a tabulated instruction
+     * {@linkplain InstructionPrinter#printInstructionListing(Value) listing}.
+     */
+    public enum InstructionLineColumn {
+        /**
+         * The instruction's bytecode index.
+         */
+        BCI(2, "bci"),
+
+        /**
+         * The instruction's use count.
+         */
+        USE(7, "use"),
+
+        /**
+         * The instruction as a {@linkplain com.sun.c1x.util.Util#valueString(com.sun.c1x.ir.Value) value}.
+         */
+        VALUE(12, "tid"),
+
+        /**
+         * The instruction formatted as an expression or statement.
+         */
+        INSTRUCTION(19, "instr"),
+
+        END(60, "");
+
+        final int position;
+        final String label;
+
+        private InstructionLineColumn(int position, String label) {
+            this.position = position;
+            this.label = label;
+        }
+
+        /**
+         * Prints this column's label to a given stream after padding the stream with '_' characters
+         * until its {@linkplain LogStream#position() position} is equal to this column's position.
+         * @param out the print stream
+         */
+        public void printLabel(LogStream out) {
+            out.fillTo(position + out.indentationLevel(), '_');
+            out.print(label);
+        }
+
+        /**
+         * Prints space characters to a given stream until its {@linkplain LogStream#position() position}
+         * is equal to this column's position.
+         * @param out the print stream
+         */
+        public void advance(LogStream out) {
+            out.fillTo(position + out.indentationLevel(), ' ');
+        }
+    }
+
+    private final LogStream out;
+
+    public InstructionPrinter(LogStream out) {
+        this.out = out;
+    }
+
+    public LogStream out() {
+        return out;
+    }
+
+    /**
+     * Prints a given instruction as an expression or statement.
+     *
+     * @param instruction the instruction to print
+     */
+    public void printInstruction(Value instruction) {
+        instruction.print(out);
+    }
+
+
+    /**
+     * Prints a header for the tabulated data printed by {@link #printInstructionListing(Value)}.
+     */
+    public void printInstructionListingHeader() {
+        BCI.printLabel(out);
+        USE.printLabel(out);
+        VALUE.printLabel(out);
+        INSTRUCTION.printLabel(out);
+        END.printLabel(out);
+        out.println();
+    }
+
+    /**
+     * Prints an instruction listing on one line. The instruction listing is composed of the
+     * columns specified by {@link InstructionLineColumn}.
+     *
+     * @param instruction the instruction to print
+     */
+    public void printInstructionListing(Value instruction) {
+        if (instruction.isLive()) {
+            out.print('.');
+        }
+
+        int indentation = out.indentationLevel();
+        out.fillTo(BCI.position + indentation, ' ').
+             print(instruction instanceof Instruction ? ((Instruction) instruction).bci() : 0).
+             fillTo(USE.position + indentation, ' ').
+             print("0").
+             fillTo(VALUE.position + indentation, ' ').
+             print(instruction).
+             fillTo(INSTRUCTION.position + indentation, ' ');
+        printInstruction(instruction);
+        String flags = instruction.flagsToString();
+        if (!flags.isEmpty()) {
+            out.print("  [flags: " + flags + "]");
+        }
+        if (instruction instanceof StateSplit) {
+            out.print("  [state: " + ((StateSplit) instruction).stateBefore() + "]");
+        }
+        out.println();
+    }
+}