| /* |
| * Copyright (c) 2015, 2015, 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.lsra.ssa; |
| |
| import org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig; |
| import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.debug.Debug.Scope; |
| import org.graalvm.compiler.lir.alloc.lsra.LinearScan; |
| import org.graalvm.compiler.lir.alloc.lsra.LinearScanEliminateSpillMovePhase; |
| import org.graalvm.compiler.lir.alloc.lsra.LinearScanLifetimeAnalysisPhase; |
| import org.graalvm.compiler.lir.alloc.lsra.LinearScanResolveDataFlowPhase; |
| import org.graalvm.compiler.lir.alloc.lsra.MoveResolver; |
| import org.graalvm.compiler.lir.gen.LIRGenerationResult; |
| import org.graalvm.compiler.lir.gen.LIRGeneratorTool.MoveFactory; |
| import org.graalvm.compiler.lir.ssa.SSAUtil; |
| |
| import jdk.vm.ci.code.TargetDescription; |
| |
| public final class SSALinearScan extends LinearScan { |
| |
| public SSALinearScan(TargetDescription target, LIRGenerationResult res, MoveFactory spillMoveFactory, RegisterAllocationConfig regAllocConfig, AbstractBlockBase<?>[] sortedBlocks, |
| boolean neverSpillConstants) { |
| super(target, res, spillMoveFactory, regAllocConfig, sortedBlocks, neverSpillConstants); |
| } |
| |
| @Override |
| protected MoveResolver createMoveResolver() { |
| SSAMoveResolver moveResolver = new SSAMoveResolver(this); |
| assert moveResolver.checkEmpty(); |
| return moveResolver; |
| } |
| |
| @Override |
| protected LinearScanLifetimeAnalysisPhase createLifetimeAnalysisPhase() { |
| return new SSALinearScanLifetimeAnalysisPhase(this); |
| } |
| |
| @Override |
| protected LinearScanResolveDataFlowPhase createResolveDataFlowPhase() { |
| return new SSALinearScanResolveDataFlowPhase(this); |
| } |
| |
| @Override |
| protected LinearScanEliminateSpillMovePhase createSpillMoveEliminationPhase() { |
| return new SSALinearScanEliminateSpillMovePhase(this); |
| } |
| |
| @Override |
| @SuppressWarnings("try") |
| protected void beforeSpillMoveElimination() { |
| /* |
| * PHI Ins are needed for the RegisterVerifier, otherwise PHIs where the Out and In value |
| * matches (ie. there is no resolution move) are falsely detected as errors. |
| */ |
| try (Scope s1 = Debug.scope("Remove Phi In")) { |
| for (AbstractBlockBase<?> toBlock : sortedBlocks()) { |
| if (toBlock.getPredecessorCount() > 1) { |
| SSAUtil.removePhiIn(getLIR(), toBlock); |
| } |
| } |
| } |
| } |
| |
| } |