[PATCH] D144319: [SimplifyCFG] Check if the return instruction causes undefined behavior

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

In D144319#4203982 <https://reviews.llvm.org/D144319#4203982>, @Mordante wrote:

> After a recent update of Clang in the libc+++ precommit CI I see consistent failures of 4 tests in our no exception build
> https://buildkite.com/llvm-project/libcxx-ci/builds/20704#0186e44d-63c5-414e-ba9d-9771804b7c4f
>
> I've bisected the issue to this patch, reverting the `.cpp` changes on HEAD fixes the build.
>
> Would it be possible to fix this issue quickly, if not can you revert this patch?

Are you sure there is no UB in your code?


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