[llvm] [gSYM] Add support merged functions in gSYM format (PR #101604)

[Greg Clayton via llvm-commits]

https://github.com/clayborg requested changes to this pull request.

Looks pretty good, just a few comments.

One thing I am wondering is do we want to try and only enable this if we see the new DWARF attribute that allows us to uniquely and correctly identify the line table entries for functions in the same compile unit with identical ranges?

https://github.com/llvm/llvm-project/pull/101604