Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotReplacementsImpl.java @ 18258:6faee2dcebbf
moved MethodHandleAccessProvider to graal.api.meta and made it retrievable from MetaAccessProvider so that it does not need to be accessed via a global in MethodHandleNode (which is problematic for remote/replay compilation) (GRAAL-874)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 05 Nov 2014 17:01:00 +0100 |
parents | a8cff27ca2e1 |
children | 91283d4a1218 |
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/* * Copyright (c) 2013, 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.oracle.graal.hotspot; import java.lang.reflect.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.replacements.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.hotspot.replacements.*; import com.oracle.graal.nodes.*; import com.oracle.graal.phases.util.*; import com.oracle.graal.replacements.*; /** * Filters certain method substitutions based on whether there is underlying hardware support for * them. */ public class HotSpotReplacementsImpl extends ReplacementsImpl { private final HotSpotVMConfig config; public HotSpotReplacementsImpl(Providers providers, SnippetReflectionProvider snippetReflection, HotSpotVMConfig config, Assumptions assumptions, TargetDescription target) { super(providers, snippetReflection, assumptions, target); this.config = config; } @Override protected ResolvedJavaMethod registerMethodSubstitution(ClassReplacements cr, Member originalMethod, Method substituteMethod) { final Class<?> substituteClass = substituteMethod.getDeclaringClass(); if (substituteClass.getDeclaringClass() == BoxingSubstitutions.class) { if (config.useHeapProfiler) { return null; } } else if (substituteClass == IntegerSubstitutions.class || substituteClass == LongSubstitutions.class) { if (substituteMethod.getName().equals("bitCount")) { if (!config.usePopCountInstruction) { return null; } } else if (substituteMethod.getName().equals("numberOfLeadingZeros")) { if (config.useCountLeadingZerosInstruction) { // bsr is lzcnt return null; } } } else if (substituteClass == CRC32Substitutions.class) { if (!config.useCRC32Intrinsics) { return null; } } else if (substituteClass == StringSubstitutions.class) { /* * AMD64's String.equals substitution needs about 8 registers so we better disable the * substitution if there is some register pressure. */ if (GraalOptions.RegisterPressure.getValue() != null) { return null; } } return super.registerMethodSubstitution(cr, originalMethod, substituteMethod); } @Override public Class<? extends FixedWithNextNode> getMacroSubstitution(ResolvedJavaMethod method) { HotSpotResolvedJavaMethod hsMethod = (HotSpotResolvedJavaMethod) method; int intrinsicId = hsMethod.intrinsicId(); if (intrinsicId != 0) { /* * The methods of MethodHandle that need substitution are signature-polymorphic, i.e., * the VM replicates them for every signature that they are actually used for. * Therefore, we cannot use the usual annotation-driven mechanism to define the */ if (MethodHandleNode.lookupMethodHandleIntrinsic(method, providers.getMetaAccess().getMethodHandleAccess()) != null) { return MethodHandleNode.class; } } return super.getMacroSubstitution(method); } }