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  1. JDK
  2. JDK-8249189

AArch64: more L2I conversions can be skipped

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    • b08
    • aarch64

    Backports

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        https://github.com/apache/lucene-solr/blob/master/lucene/core/src/java/org/apache/lucene/util/packed/DirectReader.java#L207
        public long get(long index) {
            int shift = (int) ((index + 1) & 1) << 2;

        On the following code the l2i conversion resist in machine code for aarch. It can be skipped with additional ADLC rule for the LShiftI(ConvL2I(AndL(smallmask))) template.

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8267146 AArch64: more L2I conversions can be skipped

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

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                bulasevich Boris Ulasevich
                bulasevich Boris Ulasevich
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                  Updated:
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