RFR: 8305895: Implement JEP 450: Compact Object Headers (Experimental) [v42]

[Roman Kennke]

On Tue, 15 Oct 2024 21:30:13 GMT, Volodymyr Paprotski <duke at openjdk.org> wrote:

>> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix aarch64.ad
>
> src/hotspot/cpu/x86/c2_stubGenerator_x86_64_string.cpp line 414:
> 
>> 412:   // to the valid haystack bytes on the stack.
>> 413:   {
>> 414:     const Register haystack = rbx;
> 
> Keep `rax` as index for clarity? Although it is really used as a temp..
> 
> 
> const Register index = rax;
> const Register haystack = rbx;
> copy_to_stack(haystack, haystack_len, false, index , XMM_TMP1, _masm);

I'll use rax as tmp, then.

const Register tmp = rax;
const Register haystack = rbx;
copy_to_stack(haystack, haystack_len, false, tmp , XMM_TMP1, _masm);

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/20677#discussion_r1802659159