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Andreas Zwinkau authored
Fixes opt/localopts2 Because of Phis blocks cannot be equivalent. The cfopt must do all block merging. For example, consider the case where block A has one predecessor block B, which contains a Jmp. Naively, we might exchange(A,B). However, A might contain a Phi with one operand, then the graph is broken afterwards, since we move the Phi into B as well.
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