1/*
2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.hotspot.sparc;
24
25import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL;
26import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
27import static jdk.vm.ci.code.ValueUtil.asRegister;
28
29import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
30import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
31import org.graalvm.compiler.lir.LIRInstructionClass;
32import org.graalvm.compiler.lir.Opcode;
33import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
34import org.graalvm.compiler.lir.sparc.SPARCControlFlow.ReturnOp;
35
36import jdk.vm.ci.meta.Value;
37
38/**
39 * Returns from a function.
40 */
41@Opcode("RETURN")
42final class SPARCHotSpotReturnOp extends SPARCHotSpotEpilogueOp {
43    public static final LIRInstructionClass<SPARCHotSpotReturnOp> TYPE = LIRInstructionClass.create(SPARCHotSpotReturnOp.class);
44    public static final SizeEstimate SIZE = SizeEstimate.create(2);
45
46    @Use({REG, ILLEGAL}) protected Value value;
47    @Use({REG}) protected Value safepointPollAddress;
48    private final boolean isStub;
49    private final GraalHotSpotVMConfig config;
50
51    SPARCHotSpotReturnOp(Value value, boolean isStub, GraalHotSpotVMConfig config, Value safepointPoll) {
52        super(TYPE, SIZE);
53        this.value = value;
54        this.isStub = isStub;
55        this.config = config;
56        this.safepointPollAddress = safepointPoll;
57    }
58
59    @Override
60    public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) {
61        if (!isStub) {
62            // Every non-stub compile method must have a poll before the return.
63            SPARCHotSpotSafepointOp.emitCode(crb, masm, config, true, null, asRegister(safepointPollAddress));
64        }
65        ReturnOp.emitCodeHelper(crb, masm);
66    }
67}
68