Mercurial > hg > graal-compiler
view graal/GraalCompiler/src/com/sun/c1x/graph/IR.java @ 2791:6d14aa4fbf90
Gotos removed (except for exception dispatch chains and edge splitting).
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 25 May 2011 20:03:05 +0200 |
parents | aeccd2af4e9e |
children | 2af109bec0c0 |
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/* * 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.graph; import java.util.*; import com.oracle.max.graal.schedule.*; import com.sun.c1x.*; import com.sun.c1x.debug.*; import com.sun.c1x.ir.*; import com.sun.c1x.lir.*; import com.sun.c1x.observer.*; /** * This class implements the overall container for the HIR (high-level IR) graph * and directs its construction, optimization, and finalization. */ public class IR { /** * The compilation associated with this IR. */ public final C1XCompilation compilation; /** * The start block of this IR. */ public LIRBlock startBlock; private int maxLocks; /** * The linear-scan ordered list of blocks. */ private List<LIRBlock> orderedBlocks; /** * Creates a new IR instance for the specified compilation. * @param compilation the compilation */ public IR(C1XCompilation compilation) { this.compilation = compilation; } public Map<Value, LIRBlock> valueToBlock; /** * Builds the graph, optimizes it, and computes the linear scan block order. */ public void build() { if (C1XOptions.PrintTimers) { C1XTimers.HIR_CREATE.start(); } buildGraph(); if (C1XOptions.PrintTimers) { C1XTimers.HIR_CREATE.stop(); C1XTimers.HIR_OPTIMIZE.start(); } Schedule schedule = new Schedule(this.compilation.graph); List<Block> blocks = schedule.getBlocks(); List<LIRBlock> lirBlocks = new ArrayList<LIRBlock>(); Map<Block, LIRBlock> map = new HashMap<Block, LIRBlock>(); for (Block b : blocks) { LIRBlock block = new LIRBlock(b.blockID()); block.setExceptionEntry(b.isExceptionEntry()); map.put(b, block); block.setInstructions(b.getInstructions()); block.setLinearScanNumber(b.blockID()); lirBlocks.add(block); } for (Block b : blocks) { for (Block succ : b.getSuccessors()) { if (succ.isExceptionEntry()) { map.get(b).getExceptionHandlerSuccessors().add(map.get(succ)); } else { map.get(b).blockSuccessors().add(map.get(succ)); } } for (Block pred : b.getPredecessors()) { map.get(b).blockPredecessors().add(map.get(pred)); } } // TODO(tw): Schedule nodes within a block. CriticalEdgeFinder finder = new CriticalEdgeFinder(lirBlocks, compilation.graph); finder.splitCriticalEdges(); orderedBlocks = lirBlocks; valueToBlock = new HashMap<Value, LIRBlock>(); for (LIRBlock b : orderedBlocks) { for (Instruction i : b.getInstructions()) { valueToBlock.put(i, b); } } startBlock = lirBlocks.get(0); assert startBlock != null; assert startBlock.blockPredecessors().size() == 0; /* if (startBlock.blockPredecessors().size() > 0) { LIRBlock oldStartBlock = startBlock; startBlock = new LIRBlock(orderedBlocks.size()); startBlock.blockSuccessors().add(oldStartBlock); orderedBlocks.add(startBlock); }*/ ComputeLinearScanOrder clso = new ComputeLinearScanOrder(lirBlocks.size(), startBlock); orderedBlocks = clso.linearScanOrder(); this.compilation.stats.loopCount = clso.numLoops(); int z = 0; for (LIRBlock b : orderedBlocks) { b.setLinearScanNumber(z++); } verifyAndPrint("After linear scan order"); if (C1XOptions.PrintTimers) { C1XTimers.HIR_OPTIMIZE.stop(); } } private void buildGraph() { // Graph builder must set the startBlock and the osrEntryBlock new GraphBuilder(compilation, this, compilation.graph).build(); verifyAndPrint("After graph building"); if (C1XOptions.PrintCompilation) { TTY.print(String.format("%3d blocks | ", this.numberOfBlocks())); } } /** * Gets the linear scan ordering of blocks as a list. * @return the blocks in linear scan order */ public List<LIRBlock> linearScanOrder() { return orderedBlocks; } private void print(boolean cfgOnly) { if (!TTY.isSuppressed()) { TTY.println("IR for " + compilation.method); final InstructionPrinter ip = new InstructionPrinter(TTY.out()); final BlockPrinter bp = new BlockPrinter(this, ip, cfgOnly); //getHIRStartBlock().iteratePreOrder(bp); } } /** * Verifies the IR and prints it out if the relevant options are set. * @param phase the name of the phase for printing */ public void verifyAndPrint(String phase) { if (C1XOptions.PrintHIR && !TTY.isSuppressed()) { TTY.println(phase); print(false); } if (compilation.compiler.isObserved()) { compilation.compiler.fireCompilationEvent(new CompilationEvent(compilation, phase, getHIRStartBlock(), true, false)); } } public int nextBlockNumber() { return compilation.stats.blockCount++; } public int numberOfBlocks() { return compilation.stats.blockCount; } public int numLoops() { return compilation.stats.loopCount; } /** * Updates the maximum number of locks held at any one time. * * @param locks a lock count that will replace the current {@linkplain #maxLocks() max locks} if it is greater */ public void updateMaxLocks(int locks) { if (locks > maxLocks) { maxLocks = locks; } } /** * Gets the number of locks. * @return the number of locks */ public final int maxLocks() { return maxLocks; } public Instruction getHIRStartBlock() { return (Instruction) compilation.graph.start().successors().get(0); } }