1 /* 2 * Copyright (c) 2016, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.lir.ssi; 24 25 import java.util.BitSet; 26 27 import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; 28 import org.graalvm.compiler.lir.alloc.lsra.LinearScanLifetimeAnalysisPhase; 29 import org.graalvm.compiler.lir.gen.LIRGenerationResult; 30 import org.graalvm.compiler.lir.phases.AllocationPhase; 31 import org.graalvm.compiler.lir.ssa.SSAUtil; 32 import org.graalvm.compiler.options.Option; 33 import org.graalvm.compiler.options.OptionType; 34 import org.graalvm.compiler.options.StableOptionValue; 35 36 import jdk.vm.ci.code.TargetDescription; 37 import jdk.vm.ci.common.JVMCIError; 38 39 /** 40 * Constructs {@linkplain SSIUtil SSI LIR} using a liveness analysis. 41 * 42 * Implementation derived from {@link LinearScanLifetimeAnalysisPhase}. 43 * 44 * @see SSIUtil 45 */ 46 public final class SSIConstructionPhase extends AllocationPhase { 47 48 static class Options { 49 50 //@formatter:off 51 @Option(help = "Use fast SSI builder.", type = OptionType.Debug) 52 public static final StableOptionValue<Boolean> TraceRAFastSSIBuilder = new StableOptionValue<>(true); 53 //@formatter:on 54 } 55 56 @Override 57 protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) { 58 assert SSAUtil.verifySSAForm(lirGenRes.getLIR()); 59 if (Options.TraceRAFastSSIBuilder.getValue()) { 60 FastSSIBuilder fastSSIBuilder = new FastSSIBuilder(lirGenRes.getLIR()); 61 fastSSIBuilder.build(); 62 fastSSIBuilder.finish(); 63 } else { 64 SSIBuilder ssiBuilder = new SSIBuilder(lirGenRes.getLIR()); 65 ssiBuilder.build(); 66 ssiBuilder.finish(); 67 } 68 } 69 70 static void check(AbstractBlockBase<?>[] blocks, SSIBuilderBase liveSets1, SSIBuilderBase liveSets2) { 71 for (AbstractBlockBase<?> block : blocks) { 72 check(block, liveSets1.getLiveIn(block), liveSets2.getLiveIn(block)); 73 check(block, liveSets1.getLiveOut(block), liveSets2.getLiveOut(block)); 74 } 75 } 76 77 private static void check(AbstractBlockBase<?> block, BitSet liveIn1, BitSet liveIn2) { 78 if (!liveIn1.equals(liveIn2)) { 79 throw JVMCIError.shouldNotReachHere(String.format("%s LiveSet differ: %s vs %s", block, liveIn1, liveIn2)); 80 } 81 } 82 }