[LLVMdev] The line number range of a function in source code level

[Hongxu Chen]

"liuml07 [via LLVM]" <ml-node+s1065342n56664h75 at n5.nabble.com> writes:

There is a `std::reverse_iterator' that might be useful. See this page
below for more information.

https://github.com/jirislaby/LLVMSlicer/blob/master/src/Slicing/FunctionStaticSlicer.cpp#L331

> Hi all,
>
> I need to know the line number range of a function. The start of the function
> line number can be found by the definition point, which is stored at the
> subprogram metadata: DISubprogram::getLineNumber().
>
> However, there is no API (or the metadata in the first place) to know the end of
> the function.
>
> I have to visit all the instructions of the function and maintain the max line
> number of the instructions. I use the inst_begin(func): inst_end(func) as the
> iterator. But I don't think it's effective to iterate all the instructions from
> the beginning. It's supposed that we can iterate the instructions reversely and
> the first one who has attached metadata should be treated as the end of the
> function. Unfortunately, there is no reverse iterator of a function.
>
> Any idea?
>
> Thank you very much!

-- 
Regards,
Hongxu Chen




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