Is there an option mapping assembly to IR through debug info?

Code Generation
1

As mentioned in the title, some info stored in generated object file in the format of dwarf or likewise.

2

Debug info in general, and DWARF in particular, map from assembly to source. It knows nothing about IR.

3

See ⚙ D40778 [DebugIR] Revive the Debug IR pass. [Added llvm-commits] (this never got merged, but you might be able to do something useful with it).