RFR: 8282024: add EscapeAnalysis statistics under PrintOptoStatistics [v9]

[Cesar Soares]

On Thu, 19 May 2022 23:22:41 GMT, aamarsh <duke at openjdk.java.net> wrote:

>> Escape Analysis and Scalar Replacement statistics were added when the -XX:+PrintOptoStatistics flag is set. All code is placed in `#ifndef Product` block, so this code is only run when creating a debug build. Using renaissance benchmark I ran a few tests to confirm that numbers were printing correctly. Below is an example run:
>> 
>> 
>> No escape = 317, Arg escape = 118, Global escape = 1995 (EA executed in   11.71 seconds)   ** EA stats might be slightly off since objects might be double counted due to iterative EA **
>> Objects scalar replaced = 201, Monitor objects removed = 23, GC barriers removed = 50, Memory barriers removed = 224
>
> aamarsh has updated the pull request incrementally with one additional commit since the last revision:
> 
>   removed iterative fix and refactored

Some NITs.

src/hotspot/share/opto/compile.cpp line 2179:

> 2177:     }
> 2178:     bool progress;
> 2179: 

NIT: empty line.

src/hotspot/share/opto/compile.cpp line 2210:

> 2208:       // by removing some allocations and/or locks.
> 2209:     } while (progress);
> 2210: 

NIT: empty line.

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PR: https://git.openjdk.java.net/jdk/pull/8019