[flang-commits] [flang] [mlir] [mlir][debuginfo] Add support for subprogram annotations (PR #110946)

[Walter Erquinigo via flang-commits]

walter-erquinigo wrote:

@Dinistro , I've added one more test but I'm kind of unable to implement an import test because llvm doesn't have actual C++ entities for `DW_TAG_LLVM_annotation`. All usages of annotations are done at a very low level and thus writing such tests is unfeasible (i.e. it's not possible to write `llvm.di_annotation`).
Would it be okay to land this patch as it is without the import test? I'm afraid that building the proper annotation infrastructure in LLVM would be a much larger project and that is kind of falling out of my limited timelines.

https://github.com/llvm/llvm-project/pull/110946