Mercurial > hg > graal-jvmci-8
view graal/GraalCompiler/src/com/sun/c1x/graph/IR.java @ 2771:056e392d63d4
Connected local variables to start node. No more need for frame state to emit locals.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Tue, 24 May 2011 09:49:04 +0200 |
parents | dd6419f4bfe2 |
children | 27512ea6bbcb |
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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.graal.graph.*; 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.*; import com.sun.c1x.value.*; /** * This class implements the overall container for the HIR (high-level IR) graph * and directs its construction, optimization, and finalization. * * @author Thomas Wuerthinger * @author Ben L. Titzer */ 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(); NodeMap<Block> nodeToBlock = schedule.getNodeToBlock(); Map<Block, LIRBlock> map = new HashMap<Block, LIRBlock>(); for (Block b : blocks) { map.put(b, new LIRBlock(b.blockID())); } for (Block b : blocks) { for (Block succ : b.getSuccessors()) { 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. valueToBlock = computeLinearScanOrder(); 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())); } } private Map<Value, LIRBlock> computeLinearScanOrder() { return makeLinearScanOrder(); } private Map<Value, LIRBlock> makeLinearScanOrder() { Map<Value, LIRBlock> valueToBlock = new HashMap<Value, LIRBlock>(); if (orderedBlocks == null) { CriticalEdgeFinder finder = new CriticalEdgeFinder(this); getHIRStartBlock().iteratePreOrder(finder); finder.splitCriticalEdges(); ComputeLinearScanOrder computeLinearScanOrder = new ComputeLinearScanOrder(compilation.stats.blockCount, getHIRStartBlock()); List<BlockBegin> blocks = computeLinearScanOrder.linearScanOrder(); orderedBlocks = new ArrayList<LIRBlock>(); int z = 0; for (BlockBegin bb : blocks) { LIRBlock lirBlock = new LIRBlock(z); lirBlock.getInstructions().add(bb); valueToBlock.put(bb, lirBlock); lirBlock.setLinearScanNumber(bb.linearScanNumber()); // TODO(tw): Initialize LIRBlock.linearScanLoopHeader and LIRBlock.linearScanLoopEnd lirBlock.setStateBefore(bb.stateBefore()); orderedBlocks.add(lirBlock); ++z; } z = 0; for (BlockBegin bb : blocks) { LIRBlock lirBlock = orderedBlocks.get(z); for (int i = 0; i < bb.numberOfPreds(); ++i) { lirBlock.blockPredecessors().add(valueToBlock.get(bb.predAt(i).block())); } for (int i = 0; i < bb.numberOfSux(); ++i) { lirBlock.blockSuccessors().add(valueToBlock.get(bb.suxAt(i))); } Instruction first = bb; while (first != null) { lirBlock.getInstructions().add(first); first = first.next(); } ++z; } startBlock = valueToBlock.get(getHIRStartBlock()); assert startBlock != null; compilation.stats.loopCount = computeLinearScanOrder.numLoops(); } return valueToBlock; } /** * 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)); } } /** * Creates and inserts a new block between this block and the specified successor, * altering the successor and predecessor lists of involved blocks appropriately. * @param source the source of the edge * @param target the successor before which to insert a block * @return the new block inserted */ public BlockBegin splitEdge(BlockBegin source, BlockBegin target) { int bci = -2; int backEdgeIndex = target.predecessors().indexOf(source.end()); // create new successor and mark it for special block order treatment BlockBegin newSucc = new BlockBegin(bci, nextBlockNumber(), false, compilation.graph); List<Integer> removePhiInputs = new ArrayList<Integer>(); for (int i = backEdgeIndex + 1; i < target.predecessors().size(); ++i) { if (target.predecessors().get(i) == source.end()) { removePhiInputs.add(i); } } // This goto is not a safepoint. Goto e = new Goto(target, null, compilation.graph); newSucc.appendNext(e); e.reorderSuccessor(0, backEdgeIndex); // setup states FrameState s = source.end().stateAfter(); newSucc.setStateBefore(s); e.setStateAfter(s); assert newSucc.stateBefore().localsSize() == s.localsSize(); assert newSucc.stateBefore().stackSize() == s.stackSize(); assert newSucc.stateBefore().locksSize() == s.locksSize(); // link predecessor to new block source.end().substituteSuccessor(target, newSucc); if (removePhiInputs.size() > 0) { for (Node n : target.usages()) { if (n instanceof Phi) { Phi phi = (Phi) n; int correction = 0; for (int index : removePhiInputs) { phi.removeInput(index - correction); correction++; } } } } return newSucc; } 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 BlockBegin getHIRStartBlock() { return (BlockBegin) compilation.graph.start().successors().get(0); } }