RFR: 8349835: C2: simplify IGV property printing

[Damon Fenacci]

On Mon, 22 Sep 2025 06:41:46 GMT, Damon Fenacci <dfenacci at openjdk.org> wrote:

>> The code that prints node properties and live range properties is very verbose and repetitive and could be simplified by applying a refactoring suggested [here](https://github.com/openjdk/jdk/pull/23558#discussion_r1950785708).
>> 
>> ### Fix 
>> Implemented the suggested refactoring. 
>> 
>> ### Testing 
>> Github Actions, Tier 1-3
>
> src/hotspot/share/opto/idealGraphPrinter.cpp line 534:
> 
>> 532:         {((flags & Node::Flag_has_call) != 0), "has_call", "true"},
>> 533:         {((flags & Node::Flag_has_swapped_edges) != 0), "has_swapped_edges", "true"}
>> 534:       };
> 
> The indentation seems a bit off.

BTW we might want to use `TRUE_VALUE` instead of `"true"` here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26902#discussion_r2366890675