| /* |
| * Copyright (c) 2015, 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.lir.gen; |
| |
| import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant; |
| import static org.graalvm.compiler.lir.LIRValueUtil.isVariable; |
| |
| import java.util.EnumSet; |
| |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandFlag; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandMode; |
| import org.graalvm.compiler.lir.StandardOp.LoadConstantOp; |
| import org.graalvm.compiler.lir.gen.LIRGeneratorTool.MoveFactory; |
| |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Wrapper for {@link MoveFactory} that checks that the instructions created adhere to the contract |
| * of {@link MoveFactory}. |
| */ |
| public final class VerifyingMoveFactory implements MoveFactory { |
| |
| private final MoveFactory inner; |
| |
| public VerifyingMoveFactory(MoveFactory inner) { |
| this.inner = inner; |
| } |
| |
| @Override |
| public boolean canInlineConstant(JavaConstant c) { |
| return inner.canInlineConstant(c); |
| } |
| |
| @Override |
| public boolean allowConstantToStackMove(Constant constant) { |
| return inner.allowConstantToStackMove(constant); |
| } |
| |
| @Override |
| public LIRInstruction createMove(AllocatableValue result, Value input) { |
| LIRInstruction inst = inner.createMove(result, input); |
| assert checkResult(inst, result, input); |
| return inst; |
| } |
| |
| @Override |
| public LIRInstruction createStackMove(AllocatableValue result, AllocatableValue input) { |
| LIRInstruction inst = inner.createStackMove(result, input); |
| assert checkResult(inst, result, input); |
| return inst; |
| } |
| |
| @Override |
| public LIRInstruction createLoad(AllocatableValue result, Constant input) { |
| LIRInstruction inst = inner.createLoad(result, input); |
| assert inst instanceof LoadConstantOp && checkResult(inst, result, null); |
| return inst; |
| } |
| |
| /** Closure for {@link VerifyingMoveFactory#checkResult}. */ |
| @SuppressWarnings("unused") |
| private static class CheckClosure { |
| |
| private final AllocatableValue result; |
| private final Value input; |
| |
| private int tempCount = 0; |
| private int aliveCount = 0; |
| private int stateCount = 0; |
| private int inputCount = 0; |
| private int outputCount = 0; |
| |
| CheckClosure(AllocatableValue result, Value input) { |
| this.result = result; |
| this.input = input; |
| } |
| |
| void tempProc(LIRInstruction op, Value value, OperandMode mode, EnumSet<OperandFlag> flags) { |
| assert false : String.format("SpillMoveFactory: Instruction %s is not allowed to contain operand %s of mode %s", op, value, mode); |
| tempCount++; |
| } |
| |
| void stateProc(LIRInstruction op, Value value, OperandMode mode, EnumSet<OperandFlag> flags) { |
| assert false : String.format("SpillMoveFactory: Instruction %s is not allowed to contain operand %s of mode %s", op, value, mode); |
| stateCount++; |
| } |
| |
| void aliveProc(LIRInstruction op, Value value, OperandMode mode, EnumSet<OperandFlag> flags) { |
| assert !isVariable(value) && flags.contains(OperandFlag.UNINITIALIZED) : String.format("SpillMoveFactory: Instruction %s is not allowed to contain operand %s of mode %s", op, value, mode); |
| aliveCount++; |
| } |
| |
| void inputProc(LIRInstruction op, Value value, OperandMode mode, EnumSet<OperandFlag> flags) { |
| assert value.equals(input) || isJavaConstant(value) : String.format("SpillMoveFactory: Instruction %s can only have %s as input, got %s", op, input, value); |
| inputCount++; |
| } |
| |
| void outputProc(LIRInstruction op, Value value, OperandMode mode, EnumSet<OperandFlag> flags) { |
| assert value.equals(result) : String.format("SpillMoveFactory: Instruction %s can only have %s as input, got %s", op, input, value); |
| outputCount++; |
| } |
| } |
| |
| /** |
| * Checks that the instructions adheres to the contract of {@link MoveFactory}. |
| */ |
| private static boolean checkResult(LIRInstruction inst, AllocatableValue result, Value input) { |
| |
| VerifyingMoveFactory.CheckClosure c = new CheckClosure(result, input); |
| inst.visitEachInput(c::inputProc); |
| inst.visitEachOutput(c::outputProc); |
| inst.visitEachAlive(c::aliveProc); |
| inst.visitEachTemp(c::tempProc); |
| inst.visitEachState(c::stateProc); |
| |
| assert c.outputCount >= 1 : "no output produced" + inst; |
| assert c.stateCount == 0 : "SpillMoveFactory: instruction must not have a state: " + inst; |
| return true; |
| } |
| } |