russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
75 lines
2.7 KiB
Java
75 lines
2.7 KiB
Java
/*
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* Copyright (c) 2026, 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 compiler.c2.irTests;
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import compiler.lib.ir_framework.*;
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import jdk.test.lib.Asserts;
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import java.util.Random;
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import jdk.test.lib.Utils;
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/*
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* @test
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* @bug 8375633
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* @key randomness
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* @summary Test that ConvD2F::Ideal optimization is not missed with incremental inlining.
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* AlwaysIncrementalInline is not required but deterministically defers even
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* small methods, making this test reliable.
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* @library /test/lib /
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* @run driver ${test.main.class}
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*/
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public class ConvD2FIdealizationStress {
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private static final Random RANDOM = Utils.getRandomInstance();
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public static void main(String[] args) {
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TestFramework.runWithFlags("-XX:-TieredCompilation",
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"-XX:+IgnoreUnrecognizedVMOptions",
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"-XX:+AlwaysIncrementalInline",
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"-XX:VerifyIterativeGVN=1110");
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}
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// Deferred by AlwaysIncrementalInline; ConvF2D appears only after inlining.
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static double toDouble(float x) {
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return (double) x;
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}
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// ConvD2F(SqrtD(ConvF2D(x))) => SqrtF(x)
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// Math.sqrt (intrinsic) is expanded at parse time; toDouble is deferred.
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@Test
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@IR(counts = {IRNode.SQRT_F, ">=1"},
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failOn = {IRNode.CONV_D2F, IRNode.SQRT_D, IRNode.CONV_F2D})
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public static float testSqrtConversion(float x) {
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return (float) Math.sqrt(toDouble(x));
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}
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@Run(test = "testSqrtConversion")
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public void runSqrtConversion() {
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float input = RANDOM.nextFloat();
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checkSqrtConversion(input, testSqrtConversion(input));
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}
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@DontCompile
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public void checkSqrtConversion(float input, float result) {
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Asserts.assertEQ((float) Math.sqrt(input), result);
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}
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}
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