Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotMemoryPeephole.java @ 14976:82399ac30721
make implicit null checking optional for Access nodes (fixes CAS crash)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Fri, 04 Apr 2014 17:06:44 +0200 |
parents | 8ce9a950fbe2 |
children | db4254246f9a |
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/* * Copyright (c) 2014, 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.amd64; import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.compiler.amd64.*; import com.oracle.graal.graph.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.data.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.amd64.*; import com.oracle.graal.lir.amd64.AMD64ControlFlow.BranchOp; import com.oracle.graal.lir.asm.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.extended.*; /** * Specialized code gen for comparison with compressed memory. */ public class AMD64HotSpotMemoryPeephole extends AMD64MemoryPeephole { public static class CompareMemoryCompressedOp extends AMD64LIRInstruction { @Alive({COMPOSITE}) protected AMD64AddressValue x; @Use({CONST}) protected Value y; @State protected LIRFrameState state; public CompareMemoryCompressedOp(AMD64AddressValue x, Constant y, LIRFrameState state) { assert HotSpotGraalRuntime.runtime().getConfig().useCompressedOops; this.x = x; this.y = y; this.state = state; } @Override public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { Constant constant = (Constant) y; if (constant.isNull()) { masm.cmpl(x.toAddress(), 0); } else { if (y.getKind() == Kind.Object) { crb.recordInlineDataInCode(new OopData(0, constant.asObject(), true)); } else if (y.getKind() == Kind.Long) { crb.recordInlineDataInCode(new MetaspaceData(0, constant.asLong(), constant.getPrimitiveAnnotation(), true)); } else { throw GraalInternalError.shouldNotReachHere(); } if (state != null) { crb.recordImplicitException(masm.position(), state); } masm.cmpl(x.toAddress(), 0xdeaddead); } } } AMD64HotSpotMemoryPeephole(AMD64NodeLIRBuilder gen) { super(gen); } @Override protected boolean emitCompareBranchMemory(ValueNode left, ValueNode right, Access access, Condition cond, boolean unorderedIsTrue, LabelRef trueLabel, LabelRef falseLabel, double trueLabelProbability) { if (HotSpotGraalRuntime.runtime().getConfig().useCompressedOops) { ValueNode other = selectOtherInput(left, right, access); Kind kind = access.accessLocation().getValueKind(); if (other.isConstant() && kind == Kind.Object && access.isCompressible()) { ensureEvaluated(other); gen.append(new CompareMemoryCompressedOp(makeAddress(access), other.asConstant(), getState(access))); Condition finalCondition = right == access ? cond.mirror() : cond; gen.append(new BranchOp(finalCondition, trueLabel, falseLabel, trueLabelProbability)); return true; } } return super.emitCompareBranchMemory(left, right, access, cond, unorderedIsTrue, trueLabel, falseLabel, trueLabelProbability); } }