llvm dev - Nov 2020 - Get the layout offset of an aggregate type's leave types

Hi,

I have an aggregate type like
    {i32, {i8*, i16}, [2xi8], ... },
    [2 x {i8*, i32}],
and wanted to get the offset of a leaf type from the beginning of the
aggregate type at compilation time.

DataLayout::getStructLayout returns the layout of the current level of a
struct.
* Do we have any API to get the layout for all leave types for sub-struct?
* How to get the offset of each element of an Array type?

Thank you, j
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