Re: RFR: 8380476: Implement JEP 544: Ahead-of-Time Code Compilation

[Igor Veresov]

On Thu, 16 Apr 2026 23:09:52 GMT, Vladimir Kozlov <k...@openjdk.org> wrote:

> Improve startup and warmup time by making optimized native code for an 
> application instantly available when the HotSpot Java Virtual Machine starts. 
> Achieve this by compiling application code to native code in a training run, 
> storing the native code in the [AOT 
> cache](https://openjdk.org/jeps/483#Description) for use in subsequent 
> production runs.
> 
> More details in the [JEP](https://openjdk.org/jeps/544).
> 
> ---------
> - [x] I confirm that I make this contribution in accordance with the [OpenJDK 
> Interim AI Policy](https://openjdk.org/legal/ai).

src/hotspot/share/c1/c1_LIRGenerator.cpp line 3852:

> 3850:     if (AOTCodeCache::is_dumping_code()) {
> 3851:       counter_holder = new_register(T_METADATA);
> 3852:       __ metadata2reg(counters_adr->constant_encoding(), 
> counter_holder);

I think we can do this in the general case as well. No only with 
`AOTCodeCache::is_dumping_code()`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/30778#discussion_r3762385201