[clang] [llvm] Add option to generate additional debug info for expression dereferencing pointer to pointers. (PR #81545)

[David Blaikie via cfe-commits]

dwblaikie wrote:

> As for impact, I believe @namhyung did some measurement for building the Linux kernel, and it does not have a significant impact.

That'd surprise me quite a bit - perhaps a self-host build of clang (ideally in Google's build config, that being the one you and I care about the most) - opt with fission? measuring the size of object and dwo files (linker action inputs, but ideally more fine-grained per-section size comparisons would be good) and the linked executable/dwp.

https://github.com/llvm/llvm-project/pull/81545