/*

 * Copyright (c) 2016, 2018, 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.jtt;

import org.graalvm.compiler.api.directives.GraalDirectives;

import org.graalvm.compiler.debug.DebugContext;

import org.graalvm.compiler.debug.DebugContext.Scope;

import org.graalvm.compiler.lir.LIRInstruction;

import org.graalvm.compiler.lir.LIRInstructionClass;

import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import org.graalvm.compiler.lir.gen.LIRGeneratorTool;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;

import org.junit.Assume;

import org.junit.Test;

import jdk.vm.ci.code.BailoutException;

import jdk.vm.ci.meta.ResolvedJavaMethod;

import jdk.vm.ci.meta.Value;

import jdk.vm.ci.sparc.SPARC;

/**

 * Tests the {@link BailoutException} thrown, when trying to compile huge methods, which have branch

 * displacements which does not fit into 19 bit signed.

 */

public class SPARCBranchBailoutTest extends LIRTest {

    private static class BranchSpec extends LIRTestSpecification {

        private final int n;

        BranchSpec(int n) {

            super();

            this.n = n;

        }

        @Override

        public void generate(LIRGeneratorTool gen, Value a) {

            gen.append(new LargeOp(n));

            setResult(a);

        }

    }

    private static final BranchSpec spec = new BranchSpec(1 << 20);

    @LIRIntrinsic

    public static int branch(@SuppressWarnings("unused") BranchSpec s, int a) {

        return a;

    }

    public static int testBranch(int length) {

        int res = 1;

        if (length > 0) {

            res = branch(spec, 1);

        } else {

            res = branch(spec, 2);

        }

        return GraalDirectives.opaque(res);

    }

    @SuppressWarnings("try")

    public void testBailoutOnBranchOverflow() throws Throwable {

        Assume.assumeTrue(getBackend().getTarget().arch instanceof SPARC);

        ResolvedJavaMethod m = getResolvedJavaMethod("testBranch");

        DebugContext debug = getDebugContext();

        }

    }

    public static class LargeOp extends LIRInstruction {

        private static final LIRInstructionClass<LargeOp> TYPE = LIRInstructionClass.create(LargeOp.class);

        private final int n;

        public LargeOp(int n) {

            super(TYPE);

            this.n = n;

        }

        @Override

        public void emitCode(CompilationResultBuilder crb) {

            for (int i = 0; i < n; i++) {

                crb.asm.emitInt(0);

            }

        }

    }

}