RFR: 8338623: StackCounter adding extraneous slots for receiver invoke instructions

[Adam Sotona]

On Tue, 20 Aug 2024 04:53:18 GMT, Chen Liang <liach at openjdk.org> wrote:

> StackCounter was adding return type slots before deducting receiver slot, so code like
> 
> int b() { return this.hashCode(); }
> 
> will be counted as having a max stack of 2. Avoid this problem by only calling `addStackSlot` once for each instruction.

Looks good to me.

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Marked as reviewed by asotona (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20637#pullrequestreview-2247735326