RFR: 8282024: add EscapeAnalysis statistics under PrintOptoStatistics [v7]

[Xin Liu]

On Thu, 5 May 2022 19:05:41 GMT, Xin Liu <xliu at openjdk.org> wrote:

>> @navyxliu Since no nodes are ever removed from the list, I think this issue is avoided. If we find a loop back to a node we have already searched and attempt to push this node at line 2620, it will not be added to the list because it already exists.
>
> okay. you're right. This is BFS but no element is pop.
> I also ran twice jtreg with JTREG="VM_OPTIONS=-XX:+PrintOptoStatistics", it's safe.

nits: 
This function seems not to be part of 'PhaseMacroExpand', at least it could be a static member function.

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