| /* |
| * Copyright (c) 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 java.util.ArrayList; |
| |
| import org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig; |
| import org.graalvm.compiler.core.common.alloc.Trace; |
| import org.graalvm.compiler.core.common.alloc.TraceBuilderResult; |
| import org.graalvm.compiler.lir.LIR; |
| import org.graalvm.compiler.lir.alloc.trace.TraceAllocationPhase.TraceAllocationContext; |
| import org.graalvm.compiler.lir.gen.LIRGenerationResult; |
| import org.graalvm.compiler.lir.gen.LIRGeneratorTool.MoveFactory; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.common.JVMCIError; |
| import jdk.vm.ci.meta.AllocatableValue; |
| |
| /** |
| * Manages the selection of allocation strategies. |
| */ |
| public final class TraceRegisterAllocationPolicy { |
| |
| protected abstract class AllocationStrategy { |
| TraceAllocationPhase<TraceAllocationContext> allocator; |
| |
| public final TraceAllocationPhase<TraceAllocationContext> getAllocator() { |
| if (allocator == null) { |
| allocator = initAllocator(target, lirGenRes, spillMoveFactory, registerAllocationConfig, cachedStackSlots, resultTraces, neverSpillConstants, strategies); |
| } |
| return allocator; |
| } |
| |
| protected final LIR getLIR() { |
| return lirGenRes.getLIR(); |
| } |
| |
| protected final LIRGenerationResult getLIRGenerationResult() { |
| return lirGenRes; |
| } |
| |
| protected final TraceBuilderResult getTraceBuilderResult() { |
| return resultTraces; |
| } |
| |
| /** |
| * Returns {@code true} if the allocation strategy should be used for {@code trace}. |
| */ |
| public abstract boolean shouldApplyTo(Trace trace); |
| |
| @SuppressWarnings("hiding") |
| protected abstract TraceAllocationPhase<TraceAllocationContext> initAllocator(TargetDescription target, LIRGenerationResult lirGenRes, MoveFactory spillMoveFactory, |
| RegisterAllocationConfig registerAllocationConfig, AllocatableValue[] cachedStackSlots, TraceBuilderResult resultTraces, boolean neverSpillConstant, |
| ArrayList<AllocationStrategy> strategies); |
| } |
| |
| private final TargetDescription target; |
| private final LIRGenerationResult lirGenRes; |
| private final MoveFactory spillMoveFactory; |
| private final RegisterAllocationConfig registerAllocationConfig; |
| private final AllocatableValue[] cachedStackSlots; |
| private final TraceBuilderResult resultTraces; |
| private final boolean neverSpillConstants; |
| |
| private final ArrayList<AllocationStrategy> strategies; |
| |
| public TraceRegisterAllocationPolicy(TargetDescription target, LIRGenerationResult lirGenRes, MoveFactory spillMoveFactory, RegisterAllocationConfig registerAllocationConfig, |
| AllocatableValue[] cachedStackSlots, TraceBuilderResult resultTraces, boolean neverSpillConstant) { |
| this.target = target; |
| this.lirGenRes = lirGenRes; |
| this.spillMoveFactory = spillMoveFactory; |
| this.registerAllocationConfig = registerAllocationConfig; |
| this.cachedStackSlots = cachedStackSlots; |
| this.resultTraces = resultTraces; |
| this.neverSpillConstants = neverSpillConstant; |
| |
| this.strategies = new ArrayList<>(3); |
| } |
| |
| public void appendStrategy(AllocationStrategy strategy) { |
| strategies.add(strategy); |
| } |
| |
| public TraceAllocationPhase<TraceAllocationContext> selectStrategy(Trace trace) { |
| for (AllocationStrategy strategy : strategies) { |
| if (strategy.shouldApplyTo(trace)) { |
| return strategy.getAllocator(); |
| } |
| } |
| throw JVMCIError.shouldNotReachHere("No Allocation Strategy found!"); |
| } |
| |
| } |