[clang] [C++20][Modules] Load function body from the module that gives canonical decl (PR #111992)

[Dmitry Polukhin via cfe-commits]

dmpolukhin wrote:

> Thanks for the analysis. I feel (2) is easier to me IIUC. I feel it is a natural extension of your previous work. WDYT?

I implemented this approach and it works. I tried to limit eager deserialization to the minimal set of functions (at the moment it is friend inline friend functions). PTAL.


https://github.com/llvm/llvm-project/pull/111992