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...or experiments to back that up). Note that while I'm mostly concerned with TBAA here, the same is certainly true of noalias and alias.scope metadata as well. Now, a few weeks ago, I simply hacked around this (locally) by introducing new !tbaa_src, !tbaa_dst, !noalias_src, !noalias_dest, !alias.scope_src, !alias.scope_dst metadata and adjusting LLVM to use that. This was a relatively simple change, but of course it feels rather unsatisfying and suffers from the problem that there's now some redundancy. On discussing this on IRC, I believe Hal had suggested that we might want to consider adding...