Philip Reames b90f94f42e [LV] Support invariant addresses in speculation logic ...

Implement a TODO from rL371452, and handle loop invariant addresses in predicated blocks. If we can prove that the load is safe to speculate into the header, then we can avoid using a masked.load in favour of a normal load.

This is mostly about vectorization robustness. In the common case, it's generally expected that LICM/LoadStorePromotion would have eliminated such loads entirely.

Differential Revision: https://reviews.llvm.org/D67372

llvm-svn: 371745

2019-09-12 16:49:10 +00:00

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