[llvm-dev] How to determine it is a function pointer or not?

[PeiLIU via llvm-dev]

The .ll file snippet like this:

%call162 = call i32 @pthread_create(i64* %arrayidx159,
%union.pthread_attr_t* null, i8* (i8*)* bitcast (i32 (i8*)* @bs_thread to
i8* (i8*)*), i8* %121) #9, !dbg !264

The function is pthread_create, the 3rd argument is a function that is
bs_thread(the function name), but how to determine it is a function pointer
or not?

The 3rd argument's type only is a PointerType, then I don't know how to
determine it is a function pointer or not?

Thank you! I am very appreciate your help. :)
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