1 /* 2 * Copyright (c) 2016, 2018, 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 24 25 package org.graalvm.compiler.lir.jtt; 26 27 import org.graalvm.compiler.api.directives.GraalDirectives; 28 import org.graalvm.compiler.core.common.PermanentBailoutException; 29 import org.graalvm.compiler.debug.DebugContext; 30 import org.graalvm.compiler.debug.DebugContext.Scope; 31 import org.graalvm.compiler.debug.GraalError; 32 import org.graalvm.compiler.lir.LIRInstruction; 33 import org.graalvm.compiler.lir.LIRInstructionClass; 34 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 35 import org.graalvm.compiler.lir.gen.LIRGeneratorTool; 36 import org.graalvm.compiler.nodes.StructuredGraph; 37 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 38 import org.junit.Assert; 39 import org.junit.Assume; 40 import org.junit.Test; 41 42 import jdk.vm.ci.code.BailoutException; 43 import jdk.vm.ci.meta.ResolvedJavaMethod; 44 import jdk.vm.ci.meta.Value; 45 import jdk.vm.ci.sparc.SPARC; 46 47 /** 48 * Tests the {@link BailoutException} thrown, when trying to compile huge methods, which have branch 49 * displacements which does not fit into 19 bit signed. 50 */ 51 public class SPARCBranchBailoutTest extends LIRTest { 52 private static class BranchSpec extends LIRTestSpecification { 53 private final int n; 54 55 BranchSpec(int n) { 56 super(); 57 this.n = n; 58 } 59 60 @Override 61 public void generate(LIRGeneratorTool gen, Value a) { 62 gen.append(new LargeOp(n)); 63 setResult(a); 64 } 65 } 66 67 private static final BranchSpec spec = new BranchSpec(1 << 20); 68 69 @LIRIntrinsic 70 public static int branch(@SuppressWarnings("unused") BranchSpec s, int a) { 71 return a; 72 } 73 74 public static int testBranch(int length) { 75 int res = 1; 76 if (length > 0) { 77 res = branch(spec, 1); 78 } else { 79 res = branch(spec, 2); 80 } 81 return GraalDirectives.opaque(res); 82 } 83 84 @SuppressWarnings("try") 85 @Test 86 public void testBailoutOnBranchOverflow() throws Throwable { 87 Assume.assumeTrue(getBackend().getTarget().arch instanceof SPARC); 88 ResolvedJavaMethod m = getResolvedJavaMethod("testBranch"); 89 DebugContext debug = getDebugContext(); 90 try { 91 try (Scope s = debug.disable()) { 92 StructuredGraph graph = parseEager(m, AllowAssumptions.YES, debug); 93 compile(m, graph); 94 } 95 } catch (GraalError e) { 96 Assert.assertEquals(PermanentBailoutException.class, e.getCause().getClass()); 97 } 98 } 99 100 public static class LargeOp extends LIRInstruction { 101 private static final LIRInstructionClass<LargeOp> TYPE = LIRInstructionClass.create(LargeOp.class); 102 private final int n; 103 104 public LargeOp(int n) { 105 super(TYPE); 106 this.n = n; 107 } 108 109 @Override 110 public void emitCode(CompilationResultBuilder crb) { 111 for (int i = 0; i < n; i++) { 112 crb.asm.emitInt(0); 113 } 114 } 115 } 116 }