8307351: (CmpI/L(AndI/L reg1 reg2)) on x86 can be optimized
Reviewed-by: sviswanathan, qamai, thartmann
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@ -12449,6 +12449,17 @@ instruct testI_reg_imm(rFlagsReg cr, rRegI src, immI con, immI_0 zero)
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ins_pipe(ialu_cr_reg_imm);
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%}
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instruct testI_reg_reg(rFlagsReg cr, rRegI src1, rRegI src2, immI_0 zero)
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%{
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match(Set cr (CmpI (AndI src1 src2) zero));
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format %{ "testl $src1, $src2" %}
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ins_encode %{
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__ testl($src1$$Register, $src2$$Register);
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%}
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ins_pipe(ialu_cr_reg_imm);
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%}
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instruct testI_reg_mem(rFlagsReg cr, rRegI src, memory mem, immI_0 zero)
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%{
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match(Set cr (CmpI (AndI src (LoadI mem)) zero));
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@ -12765,6 +12776,17 @@ instruct testL_reg_imm(rFlagsReg cr, rRegL src, immL32 con, immL0 zero)
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ins_pipe(ialu_cr_reg_imm);
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%}
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instruct testL_reg_reg(rFlagsReg cr, rRegL src1, rRegL src2, immL0 zero)
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%{
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match(Set cr (CmpL (AndL src1 src2) zero));
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format %{ "testq $src1, $src2\t# long" %}
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ins_encode %{
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__ testq($src1$$Register, $src2$$Register);
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%}
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ins_pipe(ialu_cr_reg_imm);
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%}
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instruct testL_reg_mem(rFlagsReg cr, rRegL src, memory mem, immL0 zero)
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%{
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match(Set cr (CmpL (AndL src (LoadL mem)) zero));
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@ -0,0 +1,103 @@
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/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.vm.compiler.x86;
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import org.openjdk.jmh.annotations.*;
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import org.openjdk.jmh.infra.Blackhole;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@Fork(value = 2)
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@Warmup(iterations = 4, time = 2, timeUnit = TimeUnit.SECONDS)
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@Measurement(iterations = 4, time = 2, timeUnit = TimeUnit.SECONDS)
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@State(Scope.Thread)
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public class AndCmpTestInstruction {
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long[] valuesLong;
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long valueMaskLong;
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int[] valuesInt;
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int valueMaskInt;
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@Setup
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public void setup() {
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Random random = new Random(42);
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valuesLong = new long[128];
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for (int i = 0; i < valuesLong.length; i++) {
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valuesLong[i] = random.nextLong();
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}
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valueMaskLong = 1000;
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valuesInt = new int[128];
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for (int i = 0; i < valuesInt.length; i++) {
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valuesInt[i] = random.nextInt();
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}
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valueMaskInt = 1000;
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}
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@Benchmark
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public void benchmarkStaticLargeAndCmpEqualsLong(Blackhole bh) {
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for (int i = 0; i < valuesLong.length; i++) {
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long value = valuesLong[i];
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long withAnd = value & 300000000000000L;
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bh.consume(withAnd == 0);
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}
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}
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@Benchmark
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public void benchmarkStaticSmallAndCmpEqualsLong(Blackhole bh) {
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for (int i = 0; i < valuesLong.length; i++) {
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long value = valuesLong[i];
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long withAnd = value & 300L;
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bh.consume(withAnd == 0);
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}
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}
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@Benchmark
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public void benchmarkOpaqueAndCmpEqualsLong(Blackhole bh) {
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for (int i = 0; i < valuesLong.length; i++) {
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long value = valuesLong[i];
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long withAnd = value & valueMaskLong;
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bh.consume(withAnd == 0);
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}
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}
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@Benchmark
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public void benchmarkStaticAndCmpEqualsInt(Blackhole bh) {
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for (int i = 0; i < valuesInt.length; i++) {
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long value = valuesInt[i];
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long withAnd = value & 300;
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bh.consume(withAnd == 0);
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}
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}
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@Benchmark
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public void benchmarkOpaqueAndCmpEqualsInt(Blackhole bh) {
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for (int i = 0; i < valuesInt.length; i++) {
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long value = valuesInt[i];
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long withAnd = value & valueMaskInt;
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bh.consume(withAnd == 0);
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}
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}
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}
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