[all-commits] [llvm/llvm-project] bdd17b: Remove a reference to rdar://problem/10664933

[Jon Roelofs via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bdd17b853fac85c6542318a7fa0382f241869a57
      https://github.com/llvm/llvm-project/commit/bdd17b853fac85c6542318a7fa0382f241869a57
  Author: Jon Roelofs <jonathan_roelofs at apple.com>
  Date:   2023-08-09 (Wed, 09 Aug 2023)

  Changed paths:
    M llvm/lib/CodeGen/SplitKit.cpp

  Log Message:
  -----------
  Remove a reference to rdar://problem/10664933

The original commit, and the comments in the code already provide sufficient
context. But for posterity, there's a tiny bit more that might be useful if
someone is digging here in the future:

> This is related to <rdar://problem/10318439> Lower invokes into terminating
> machine instructions.
>
> The return value from a function call is live in to that function call's
> landing pad. The landing pad is shared with a later call, and the variable is
> undef on the first exceptional edge.
>
> Our computation of the last legal split point gets confused because the
> return value is live-out from the calling block, and live-in to the landing
> pad, but it is not live on the edge itself.
>
> Fixed in r147911 and r147912.