| /* |
| * Copyright (c) 2013, 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.hotspot.aarch64; |
| |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL; |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; |
| import static jdk.vm.ci.aarch64.AArch64.lr; |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| |
| import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Returns from a function. |
| */ |
| @Opcode("RETURN") |
| public final class AArch64HotSpotReturnOp extends AArch64HotSpotEpilogueOp { |
| |
| public static final LIRInstructionClass<AArch64HotSpotReturnOp> TYPE = LIRInstructionClass.create(AArch64HotSpotReturnOp.class); |
| |
| @Use({REG, ILLEGAL}) private Value result; |
| private final boolean isStub; |
| |
| public AArch64HotSpotReturnOp(Value result, boolean isStub, GraalHotSpotVMConfig config) { |
| super(TYPE, config); |
| assert validReturnValue(result); |
| this.result = result; |
| this.isStub = isStub; |
| } |
| |
| private static boolean validReturnValue(Value result) { |
| if (result.equals(Value.ILLEGAL)) { |
| return true; |
| } |
| return asRegister(result).encoding == 0; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { |
| final boolean emitSafepoint = !isStub; |
| leaveFrame(crb, masm, emitSafepoint); |
| masm.ret(lr); |
| } |
| } |