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13391d5a59
We can prove more predicates when we have a context when eliminating ICmp. As first (and very obvious) approximation we can use the ICmp instruction itself, though in the future we are going to use a common dominator of all its users. Need some refactoring before that. Observed ~0.5% negative compile time impact. Differential Revision: https://reviews.llvm.org/D98697 Reviewed By: lebedev.ri