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2017 Apr 11
3
TBAA for subset of a loaded value
I'm interested in what we can do about TBAA for loads that the compiler inserts when optimizing loads into smaller loads (e.g. what SROA does). I'm gonna set the stage by using a small C snippet, because I think C has the best-understood implementation of TBAA among the folks on the list. However, I was unable to actually come up with an example where this inhibits optimizations coming