Mercurial > hg > truffle
diff graal/GraalCompiler/src/com/sun/c1x/lir/LIRBranch.java @ 2509:16b9a8b5ad39
Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Wed, 27 Apr 2011 11:50:44 +0200 |
parents | graal/Compiler/src/com/sun/c1x/lir/LIRBranch.java@9ec15d6914ca |
children | 0ea5f12e873a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/GraalCompiler/src/com/sun/c1x/lir/LIRBranch.java Wed Apr 27 11:50:44 2011 +0200 @@ -0,0 +1,162 @@ +/* + * 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.lir; + +import com.sun.c1x.asm.*; +import com.sun.c1x.ir.*; +import com.sun.cri.ci.*; + +/** + * @author Marcelo Cintra + * @author Thomas Wuerthinger + * + */ +public class LIRBranch extends LIRInstruction { + + private Condition cond; + private CiKind kind; + private Label label; + + /** + * The target block of this branch. + */ + private BlockBegin block; + + /** + * This is the unordered block for a float branch. + */ + private BlockBegin unorderedBlock; + + + public LIRBranch(Condition cond, Label label) { + this(cond, label, null); + } + + /** + * Creates a new LIRBranch instruction. + * + * @param cond the branch condition + * @param label target label + * + */ + public LIRBranch(Condition cond, Label label, LIRDebugInfo info) { + super(LIROpcode.Branch, CiValue.IllegalValue, info, false); + this.cond = cond; + this.label = label; + } + + /** + * Creates a new LIRBranch instruction. + * + * @param cond + * @param kind + * @param block + * + */ + public LIRBranch(Condition cond, CiKind kind, BlockBegin block) { + super(LIROpcode.Branch, CiValue.IllegalValue, null, false); + this.cond = cond; + this.kind = kind; + this.label = block.label(); + this.block = block; + this.unorderedBlock = null; + } + + public LIRBranch(Condition cond, CiKind kind, BlockBegin block, BlockBegin ublock) { + super(LIROpcode.CondFloatBranch, CiValue.IllegalValue, null, false); + this.cond = cond; + this.kind = kind; + this.label = block.label(); + this.block = block; + this.unorderedBlock = ublock; + } + + /** + * @return the condition + */ + public Condition cond() { + return cond; + } + + public Label label() { + return label; + } + + public BlockBegin block() { + return block; + } + + public BlockBegin unorderedBlock() { + return unorderedBlock; + } + + public void changeBlock(BlockBegin b) { + assert block != null : "must have old block"; + assert block.label() == label() : "must be equal"; + + this.block = b; + this.label = b.label(); + } + + public void changeUblock(BlockBegin b) { + assert unorderedBlock != null : "must have old block"; + this.unorderedBlock = b; + } + + public void negateCondition() { + cond = cond.negate(); + } + + @Override + public void emitCode(LIRAssembler masm) { + masm.emitBranch(this); + } + + @Override + public String operationString(OperandFormatter operandFmt) { + StringBuilder buf = new StringBuilder(cond().operator).append(' '); + if (block() != null) { + buf.append("[B").append(block.blockID).append(']'); + } else if (label().isBound()) { + buf.append("[label:0x").append(Integer.toHexString(label().position())).append(']'); + } else { + buf.append("[label:??]"); + } + if (unorderedBlock() != null) { + buf.append("unordered: [B").append(unorderedBlock().blockID).append(']'); + } + return buf.toString(); + } + + public void substitute(BlockBegin oldBlock, BlockBegin newBlock) { + if (block == oldBlock) { + block = newBlock; + LIRInstruction instr = newBlock.lir().instructionsList().get(0); + assert instr instanceof LIRLabel : "first instruction of block must be label"; + label = ((LIRLabel) instr).label(); + } + if (unorderedBlock == oldBlock) { + unorderedBlock = newBlock; + } + } +}