| /* |
| * Copyright (c) 2015, 2016, 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 org.graalvm.compiler.lir.alloc.trace; |
| |
| import static org.graalvm.compiler.lir.LIRValueUtil.asVariable; |
| import static org.graalvm.compiler.lir.LIRValueUtil.isConstantValue; |
| import static org.graalvm.compiler.lir.LIRValueUtil.isVariable; |
| import static org.graalvm.compiler.lir.alloc.trace.TraceUtil.isTrivialTrace; |
| |
| import java.util.List; |
| |
| import org.graalvm.compiler.core.common.alloc.Trace; |
| import org.graalvm.compiler.core.common.alloc.TraceBuilderResult; |
| import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; |
| import org.graalvm.compiler.lir.LIR; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandFlag; |
| import org.graalvm.compiler.lir.StandardOp.JumpOp; |
| import org.graalvm.compiler.lir.StandardOp.LabelOp; |
| import org.graalvm.compiler.lir.ValueProcedure; |
| import org.graalvm.compiler.lir.Variable; |
| import org.graalvm.compiler.lir.gen.LIRGenerationResult; |
| import org.graalvm.compiler.lir.ssi.SSIUtil; |
| import org.graalvm.compiler.lir.util.VariableVirtualStackValueMap; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Allocates a trivial trace i.e. a trace consisting of a single block with no instructions other |
| * than the {@link LabelOp} and the {@link JumpOp}. |
| */ |
| final class TrivialTraceAllocator extends TraceAllocationPhase<TraceAllocationPhase.TraceAllocationContext> { |
| |
| @Override |
| protected void run(TargetDescription target, LIRGenerationResult lirGenRes, Trace trace, TraceAllocationContext context) { |
| LIR lir = lirGenRes.getLIR(); |
| TraceBuilderResult resultTraces = context.resultTraces; |
| assert isTrivialTrace(lir, trace) : "Not a trivial trace! " + trace; |
| AbstractBlockBase<?> block = trace.getBlocks()[0]; |
| |
| AbstractBlockBase<?> pred = TraceUtil.getBestTraceInterPredecessor(resultTraces, block); |
| |
| VariableVirtualStackValueMap<Variable, Value> variableMap = new VariableVirtualStackValueMap<>(lir.numVariables(), 0); |
| SSIUtil.forEachValuePair(lir, block, pred, (to, from) -> { |
| if (isVariable(to)) { |
| variableMap.put(asVariable(to), from); |
| } |
| }); |
| |
| ValueProcedure outputConsumer = (value, mode, flags) -> { |
| if (isVariable(value)) { |
| Value incomingValue = variableMap.get(asVariable(value)); |
| assert !flags.contains(OperandFlag.COMPOSITE); |
| assert !(SSIUtil.incoming(lir, block).isPhiIn() && isConstantValue(incomingValue)) : "Phi variable cannot be constant: " + incomingValue + " -> " + value; |
| return incomingValue; |
| } |
| return value; |
| }; |
| |
| List<LIRInstruction> instructions = lir.getLIRforBlock(block); |
| for (LIRInstruction op : instructions) { |
| |
| op.forEachOutput(outputConsumer); |
| op.forEachTemp(outputConsumer); |
| op.forEachAlive(outputConsumer); |
| op.forEachInput(outputConsumer); |
| op.forEachState(outputConsumer); |
| } |
| } |
| } |