[llvm] [Dwarf][Transforms] Add dwarf support when func signature changed (PR #127855)

[Paul T Robinson via llvm-commits]

pogo59 wrote:

What's going on here is really kind of the opposite of what DW_AT_artificial is used for. Artificial is something introduced by the compiler that isn't in the source. Here we have something removed (or modified). 

https://github.com/llvm/llvm-project/pull/127855