Dylan DPC d956d014f2
Rollup merge of #96432 - SparrowLii:dbg_scope, r=davidtwco
not need `Option` for `dbg_scope`

This PR fixes a few FIXME about not using `Option` in `dbg_scope` field of `DebugScope`, during `create_function_debug_context` func in codegen parts.
Added a `BitSet<SourceScope>` parameter to `make_mir_scope` to indicate whether the `DebugScope` has been instantiated.
cc ````@eddyb````
2022-04-28 02:40:34 +02:00
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