RFR: 8344122: IGV: Extend c2 IdealGraphPrinter to send subgraphs to IGV

[Emanuel Peter]

On Wed, 13 Nov 2024 14:41:24 GMT, Tobias Holenstein <tholenstein at openjdk.org> wrote:

> IGV XML already support to define which graphs are visible when opened. Extend the IdealGraphPrinter::print... in C2 to define which nodes should be visible in IGV when sent over the network
> 
> ### Add a new option "!" to dump_bfs
> The option ! send the printed nodes of dump_bfs to IGV and shows them 
> 
> p find_node(0)->dump_bfs(1,0,"dcmxo+!")
> 
> dist dump
> ---------------------------------------------
>    1  51  Return  === 46 6 47 8 9 returns 39  [[ 0 ]] 
>    0   0  Root  === 0 51  [[ 0 1 3 26 ]] 
> Method printed over network stream to IGV
> 
> 
> <img width="668" alt="dump" src="https://github.com/user-attachments/assets/d476e8b0-c444-4cd3-b40d-4a8f35caba83">

Nice Work, looks great :)

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

Marked as reviewed by epeter (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22076#pullrequestreview-2435664124