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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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package org.graalvm.compiler.replacements.nodes;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;

import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodeinfo.Verbosity;
import org.graalvm.compiler.nodes.FixedWithNextNode;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.LIRLowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.Value;

Changes the value of a specific register.
/** * Changes the value of a specific register. */
@NodeInfo(nameTemplate = "WriteRegister %{p#register}", cycles = CYCLES_2, size = SIZE_1) public final class WriteRegisterNode extends FixedWithNextNode implements LIRLowerable { public static final NodeClass<WriteRegisterNode> TYPE = NodeClass.create(WriteRegisterNode.class);
The fixed register to access.
/** * The fixed register to access. */
protected final Register register;
The new value assigned to the register.
/** * The new value assigned to the register. */
@Input ValueNode value; public WriteRegisterNode(Register register, ValueNode value) { super(TYPE, StampFactory.forVoid()); this.register = register; this.value = value; } @Override public void generate(NodeLIRBuilderTool generator) { Value val = generator.operand(value); generator.getLIRGeneratorTool().emitMove(register.asValue(val.getValueKind()), val); } @Override public String toString(Verbosity verbosity) { if (verbosity == Verbosity.Name) { return super.toString(Verbosity.Name) + "%" + register; } else { return super.toString(verbosity); } } }