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Function dmd.backend.gflow.flowcp
COPY PROPAGATION
void flowcp(
ref dmd
) nothrow @trusted;
Compute copy propagation info (CPs). Very similar to AEs (the same code is used). Using RDs for copy propagation is WRONG! That is, set of copy statements still valid. Bin = the set of CPs reaching the beginning of B. Bout = the set of CPs reaching the end of B.
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