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  */
  23 package org.graalvm.compiler.hotspot.sparc;
  24 
  25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL;
  26 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
  27 import static jdk.vm.ci.code.ValueUtil.asRegister;
  28 
  29 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
  30 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  31 import org.graalvm.compiler.lir.LIRInstructionClass;
  32 import org.graalvm.compiler.lir.Opcode;
  33 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  34 import org.graalvm.compiler.lir.sparc.SPARCControlFlow.ReturnOp;
  35 
  36 import jdk.vm.ci.meta.Value;
  37 
  38 /**
  39  * Returns from a function.
  40  */
  41 @Opcode("RETURN")
  42 final 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 }