Go compiler - questions about escape analysis.

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Hi,

I'm reading the go compiler source code and now come to the escape analysis part,  I just can't figured out the following question so I want to get some help from the community:

What's the meaning of location.transient?  I can't fully understand the comment of this field, could someone please give me an example to explain the meaning of "the represented expression's address does not outlive the statement; that is, whether its storage can be immediately reused"?  

Thanks for any help and tips.