[PATCH] D99790: [CGCall] Annotate `this` argument with alignment

[Roman Lebedev via Phabricator via cfe-commits]

lebedev.ri added a comment.

In D99790#2677917 <https://reviews.llvm.org/D99790#2677917>, @brooksmoses wrote:

> As a heads up, I'm seeing segfaults on internal code as a result of this change, as well as errors in Eigen's unalignedassert.cpp test (specifically, this line asserts: https://github.com/madlib/eigen/blob/master/test/unalignedassert.cpp#L151).

Would be good to have a small standalone reproducer.
Not really sure how we can end up with a misaligned `this`, but it sounds like UB.


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https://reviews.llvm.org/D99790