rupprecht added a comment.

In D146987#4263048 <https://reviews.llvm.org/D146987#4263048>, @MaskRay wrote:
> The latest reland 3820e9a2b29a2e268319ed6635da0d59e18d736d 
> <https://reviews.llvm.org/rG3820e9a2b29a2e268319ed6635da0d59e18d736d> still 
> caused some issues to our internal workloads. Stay tuned...
>
> So far we have only found crashes with ThinLTO workloads.

More specifically, thinlto + split debug.

I'm not sure if my reduction is the same issue as @aeubanks has. Here's mine: 
F27123766: repro-D146987.ll <https://reviews.llvm.org/F27123766>

Repro w/ `clang -O1 -c reduced.ll -o /dev/null`

I don't see any assertions going off for this one. The stack trace I have just 
points to `llvm::Value::stripPointerCasts`. Lemme know if you need more info, 
but I'm hoping that file reproduces for you.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146987/new/

https://reviews.llvm.org/D146987

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