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[DAG] Move OR(AND(X,C1),AND(OR(X,Y),C2)) -> OR(AND(X,OR(C1,C2)),AND(Y…
…,C2)) fold to SimplifyDemandedBits This will fix the SystemZ v3i31 memcpy regression in D77804 (with the help of D129765 as well....). It should also allow us to /bend/ the oneuse limitation for cases where we can use demanded bits to safely peek though multiple uses of the AND ops.
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