Max Kazantsev 4e87823026 [LoopLoadElim] Fix crash by always checking simplify form
Loop simplify form should always be checked because logic of
propagateStoredValueToLoadUsers relies on it (in particular, it
requires preheader).

Reviewed By: Fedor Sergeev, Florian Hahn
Differential Revision: https://reviews.llvm.org/D77775
2020-04-10 09:23:28 +07:00
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