Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/debug/InstructionPrinter.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/debug/InstructionPrinter.java Wed Apr 27 11:43:22 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(); + } +}