TestBzhiIR.java

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/**
 * @test
 * @bug 8389111
 * @summary Verify BZHI matching for bounded and unrestricted int shift counts
 * @requires vm.simpleArch == "x64" & vm.compiler2.enabled
 * @library /test/lib /
 * @run driver compiler.intrinsics.bmi.TestBzhiIR
 */

package compiler.intrinsics.bmi;

import compiler.lib.ir_framework.Argument;
import compiler.lib.ir_framework.Arguments;
import compiler.lib.ir_framework.CompilePhase;
import compiler.lib.ir_framework.IR;
import compiler.lib.ir_framework.Test;
import compiler.lib.ir_framework.TestFramework;

public class TestBzhiIR {

    public static void main(String[] args) {
        TestFramework.runWithFlags("-XX:+IgnoreUnrecognizedVMOptions",
                                   "-XX:+UseBMI2Instructions");
    }

    @Test
    @Arguments(values = {Argument.RANDOM_EACH, Argument.RANDOM_EACH})
    @IR(counts = {"bzhiI_rReg_rReg\\b", "1"},
        failOn = {"bzhiI_rReg_rReg_bounded"},
        phase = CompilePhase.MATCHING,
        applyIfCPUFeature = {"bmi2", "true"})
    public static int testUnrestricted(int value, int bits) {
        return value & ((1 << bits) - 1);
    }

    @Test
    @Arguments(values = {Argument.RANDOM_EACH, Argument.RANDOM_EACH})
    @IR(counts = {"bzhiI_rReg_rReg_bounded", "1"},
        failOn = {"bzhiI_rReg_rReg\\b"},
        phase = CompilePhase.MATCHING,
        applyIfCPUFeature = {"bmi2", "true"})
    public static int testBounded(int value, int bits) {
        return value & ((1 << (bits & 31)) - 1);
    }
}