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8333334: C2: Make result of Node::dominates more precise to enhance scalar replacement

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Reviewed-by: chagedorn, kvn, thartmann
This commit is contained in:
Qizheng Xing 2024-08-23 09:30:47 +00:00
parent 69bd227e6c
commit 965dd1acd0
6 changed files with 236 additions and 50 deletions
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17
test/micro/org/openjdk/bench/java/util/concurrent/Maps.java
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2014, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2024, Alibaba Group Holding Limited. 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
@ -35,6 +36,7 @@ import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Threads;
import org.openjdk.jmh.annotations.Warmup;
import java.util.Enumeration;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
@ -127,6 +129,21 @@ public class Maps {
return map;
}
@Benchmark
public int testConcurrentHashMapIterators() {
ConcurrentHashMap<Integer, Integer> map = (ConcurrentHashMap<Integer, Integer>) staticMap;
int sum = 0;
Enumeration it = map.elements();
while (it.hasMoreElements()) {
sum += (int) it.nextElement();
}
it = map.keys();
while (it.hasMoreElements()) {
sum += (int) it.nextElement();
}
return sum;
}
private static class SimpleRandom {
private final static long multiplier = 0x5DEECE66DL;
private final static long addend = 0xBL;