jpountz commented on code in PR #12903:
URL: https://github.com/apache/lucene/pull/12903#discussion_r1421819068
##########
lucene/core/src/java/org/apache/lucene/util/MSBRadixSorter.java:
##########
@@ -214,6 +214,12 @@ protected int getBucket(int i, int k) {
* @see #buildHistogram
*/
private int computeCommonPrefixLengthAndBuildHistogram(int from, int to, int
k, int[] histogram) {
+ int commonPrefixLength = computeInitialCommonPrefixLength(from, k);
+ return computeCommonPrefixLengthAndBuildHistogramPart1(
+ from, to, k, histogram, commonPrefixLength);
+ }
+
+ private int computeInitialCommonPrefixLength(int from, int k) {
Review Comment:
Can you add a comment here and in other places that you touched, explaining
that this works around a C2 compiler bug?
##########
lucene/core/src/test/org/apache/lucene/util/bkd/TestDocIdsWriter.java:
##########
@@ -150,4 +154,18 @@ public Relation compare(byte[] minPackedValue, byte[]
maxPackedValue) {
}
dir.deleteFile("tmp");
}
+
+ // This simple test tickles a JVM JIT crash on JDK's less than 21.0.1
+ // Needs to be run with C2, so with the environment variable `CI` set
+ public void testCrash() throws IOException {
+ for (int i = 0; i < 100; i++) {
+ try (Directory dir = newDirectory();
+ IndexWriter iw = new IndexWriter(dir, newIndexWriterConfig(null))) {
+ for (int d = 0; d < 20_000; d++) {
+ iw.addDocument(
+ List.of(new IntPoint("foo", 0), new
SortedNumericDocValuesField("bar", 0)));
+ }
+ }
+ }
+ }
Review Comment:
How long does this test take? If it's multiple seconds, should it only run
nightly?
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