1 /* 2 * Copyright (c) 2013, 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.core.test.backend; 24 25 import java.util.HashSet; 26 27 import jdk.vm.ci.code.Register; 28 import jdk.vm.ci.code.ValueUtil; 29 import jdk.vm.ci.meta.Value; 30 31 import org.junit.Assert; 32 33 import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; 34 import org.graalvm.compiler.debug.Debug; 35 import org.graalvm.compiler.debug.Debug.Scope; 36 import org.graalvm.compiler.lir.LIR; 37 import org.graalvm.compiler.lir.LIRInstruction; 38 import org.graalvm.compiler.lir.LIRValueUtil; 39 import org.graalvm.compiler.lir.StandardOp.ValueMoveOp; 40 import org.graalvm.compiler.lir.ValueProcedure; 41 import org.graalvm.compiler.nodes.StructuredGraph; 42 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 43 44 public class AllocatorTest extends BackendTest { 45 46 @SuppressWarnings("try") 47 protected void testAllocation(String snippet, final int expectedRegisters, final int expectedRegRegMoves, final int expectedSpillMoves) { 48 final StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); 49 try (Scope s = Debug.scope("AllocatorTest", graph, graph.method(), getCodeCache())) { 50 final RegisterStats stats = new RegisterStats(getLIRGenerationResult(graph).getLIR()); 51 try (Scope s2 = Debug.scope("Assertions", stats.lir)) { 52 Assert.assertEquals("register count", expectedRegisters, stats.registers.size()); 53 Assert.assertEquals("reg-reg moves", expectedRegRegMoves, stats.regRegMoves); 54 Assert.assertEquals("spill moves", expectedSpillMoves, stats.spillMoves); 55 } catch (Throwable e) { 56 throw Debug.handle(e); 57 } 58 } catch (Throwable e) { 59 throw Debug.handle(e); 60 } 61 } 62 63 private class RegisterStats { 64 65 public final LIR lir; 66 public HashSet<Register> registers = new HashSet<>(); 67 public int regRegMoves; 68 public int spillMoves; 69 70 RegisterStats(LIR lir) { 71 this.lir = lir; 72 73 for (AbstractBlockBase<?> block : lir.codeEmittingOrder()) { 74 if (block == null) { 75 continue; 76 } 77 for (LIRInstruction instr : lir.getLIRforBlock(block)) { 78 collectStats(instr); 79 } 80 } 81 } 82 83 private ValueProcedure collectStatsProc = (value, mode, flags) -> { 84 if (ValueUtil.isRegister(value)) { 85 final Register reg = ValueUtil.asRegister(value); 86 registers.add(reg); 87 } 88 return value; 89 }; 90 91 private void collectStats(final LIRInstruction instr) { 92 instr.forEachOutput(collectStatsProc); 93 94 if (instr instanceof ValueMoveOp) { 95 ValueMoveOp move = (ValueMoveOp) instr; 96 Value def = move.getResult(); 97 Value use = move.getInput(); 98 if (ValueUtil.isRegister(def)) { 99 if (ValueUtil.isRegister(use)) { 100 regRegMoves++; 101 } 102 } else if (LIRValueUtil.isStackSlotValue(def)) { 103 spillMoves++; 104 } 105 } 106 } 107 } 108 }