1 /*
   2  * Copyright (c) 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.lir.alloc;
  24 
  25 import static org.graalvm.compiler.lir.LIRValueUtil.isVariable;
  26 import static org.graalvm.compiler.lir.LIRValueUtil.isVirtualStackSlot;
  27 
  28 import java.util.EnumSet;
  29 import org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
  30 import org.graalvm.compiler.lir.LIR;
  31 import org.graalvm.compiler.lir.LIRInstruction;
  32 import org.graalvm.compiler.lir.LIRInstruction.OperandFlag;
  33 import org.graalvm.compiler.lir.LIRInstruction.OperandMode;
  34 import org.graalvm.compiler.lir.gen.LIRGenerationResult;
  35 import org.graalvm.compiler.lir.phases.AllocationPhase;
  36 
  37 import jdk.vm.ci.code.TargetDescription;
  38 import jdk.vm.ci.meta.Value;
  39 
  40 /**
  41  * Verifies that all virtual operands have been replaced by concrete values.
  42  */
  43 public class AllocationStageVerifier extends AllocationPhase {
  44 
  45     @Override
  46     protected void run(TargetDescription target, LIRGenerationResult lirGenRes, AllocationContext context) {
  47         verifyLIR(lirGenRes.getLIR());
  48 
  49     }
  50 
  51     protected void verifyLIR(LIR lir) {
  52         for (AbstractBlockBase<?> block : lir.getControlFlowGraph().getBlocks()) {
  53             verifyBlock(lir, block);
  54         }
  55     }
  56 
  57     protected void verifyBlock(LIR lir, AbstractBlockBase<?> block) {
  58         for (LIRInstruction inst : lir.getLIRforBlock(block)) {
  59             verifyInstruction(inst);
  60         }
  61     }
  62 
  63     protected void verifyInstruction(LIRInstruction inst) {
  64         inst.visitEachInput(this::verifyOperands);
  65         inst.visitEachOutput(this::verifyOperands);
  66         inst.visitEachAlive(this::verifyOperands);
  67         inst.visitEachTemp(this::verifyOperands);
  68     }
  69 
  70     /**
  71      * @param instruction
  72      * @param value
  73      * @param mode
  74      * @param flags
  75      */
  76     protected void verifyOperands(LIRInstruction instruction, Value value, OperandMode mode, EnumSet<OperandFlag> flags) {
  77         assert !isVirtualStackSlot(value) && !isVariable(value) : "Virtual values not allowed after allocation stage: " + value;
  78     }
  79 
  80 }