RFR: 8301995: Move invokedynamic resolution information out of ConstantPoolCacheEntry [v3]

[Matias Saavedra Silva]

On Tue, 14 Mar 2023 15:39:39 GMT, Gui Cao <gcao at openjdk.org> wrote:

>> Matias Saavedra Silva has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:
>> 
>>  - Typo in comment
>>  - Merge branch 'master' into resolvedIndyEntry_8301995
>>  - Interpreter optimization and comments
>>  - PPC and RISCV port
>>  - 8301995: Move invokedynamic resolution information out of the cpCache
>
> src/hotspot/cpu/aarch64/interp_masm_aarch64.cpp line 1843:
> 
>> 1841:   ldr(cache, Address(rcpool, in_bytes(ConstantPoolCache::invokedynamic_entries_offset())));
>> 1842:   // Scale the index to be the entry index * sizeof(ResolvedInvokeDynamicInfo)
>> 1843:   mov(tmp, sizeof(ResolvedIndyEntry));
> 
> The tmp register is not used here, is it redundant?

Right, the tmp register is not needed anymore thanks to the mul to shift optimization. Note that shifting will not be possible on 32-bit systems due to the size of ResolvedIndyEntry not being a power of two. This optimization only works on 64 bit builds.

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PR: https://git.openjdk.org/jdk/pull/12778