[LLVMdev] How to get the PostDominanceFrontier?

[xia_yimin]

When analysing a function "fn", my FunctionPass needs some PostDominanceFrontier 
information of functions which are called by function "fn". 
getAnalysis<PostDominanceFrontier>() cannot give the information, because it only 
gives the PostDominanceFrontier information of "fn", not the PostDominanceFrontier 
information of functions called by "fn".

How to get the PostDominanceFrontier information of functions which are called by "fn"?

Xia

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