Mercurial > hg > truffle
view graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64ZapRegistersOp.java @ 10072:62ea8789b88a
Remove leaf calls for G1 calls
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Mon, 17 Jun 2013 20:39:24 +0200 |
parents | fbeda9df497d |
children | 62fb4919edc9 |
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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.lir.amd64; import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.amd64.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.asm.*; /** * Writes well known garbage values to registers. */ @Opcode("ZAP_REGISTER") public final class AMD64ZapRegistersOp extends AMD64RegistersPreservationOp { /** * The registers that are zapped. */ protected final Register[] zappedRegisters; /** * The garbage values that are written to the registers. */ @Use({CONST}) protected Constant[] zapValues; public AMD64ZapRegistersOp(Register[] zappedRegisters, Constant[] zapValues) { this.zappedRegisters = zappedRegisters; this.zapValues = zapValues; } @Override public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) { for (int i = 0; i < zappedRegisters.length; i++) { if (zappedRegisters[i] != null) { RegisterValue registerValue = zappedRegisters[i].asValue(zapValues[i].getPlatformKind()); AMD64Move.move(tasm, masm, registerValue, zapValues[i]); } } } /** * Prunes the set of registers zapped by this operation to exclude those in {@code ignored}. */ @Override public void update(Set<Register> ignored, DebugInfo debugInfo, FrameMap frameMap) { for (int i = 0; i < zappedRegisters.length; i++) { if (zappedRegisters[i] != null) { if (ignored.contains(zappedRegisters[i])) { zappedRegisters[i] = null; } } } } }