[jdk17u-dev] RFR: 8305959: x86: Improve itable_stub

[duke]

On Wed, 3 Jul 2024 09:56:24 GMT, Dmitry Chuyko <dchuyko at openjdk.org> wrote:

> This is a performance backport from 21. Original patch was applied mostly cleanly. Few bits required slight tuning. 
> 
> Straightforward replacements were made in in macroAssembler_x86.cpp because of missing JDK-8308396 refactoring (21):
> in_bytes(itableMethodEntry::method_offset()) to itableMethodEntry::method_offset_in_bytes(),
> in_bytes(itableOffsetEntry::interface_offset()) to itableOffsetEntry::interface_offset_in_bytes(),
> in_bytes(itableOffsetEntry::offset_offset()) to itableOffsetEntry::offset_offset_in_bytes().
> 
> One java import hunk was manually redone in the benchmark class.
> 
> Testing: linux x86 tier1,2; the benchmark shows improvements similar to original results.

@dchuyko 
Your change (at version 198f513e9424ec81d632ff5d8d3ec2f51d20d97e) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/2654#issuecomment-2214622135