a21abc782a
This is an attempt at rebooting https://reviews.llvm.org/D28990 I've included AutoUpgrade changes to modify the data layout to satisfy the compatible layout check. But this does mean alloca, loads, stores, etc in old IR will automatically get this new alignment. This should fix PR46320. Reviewed By: echristo, rnk, tmgross Differential Revision: https://reviews.llvm.org/D86310