Support the Jacoco filter merge operation in Java branch coverage. #13972
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Instructions that are indicated to be merged must have their corresponding coverage expressions (`CovExp`) combined in a pairwise fashion. e.g. A pair of branch expressions that should be merged: `BranchExp(a, b)`, `BranchExp(c, d)` Becomes: `BranchExp(a | c, b | d)` This is distinct from the previous merge operation on BranchExp which simply joined the branches of the two objects (this has been renamed to concatenate).
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Instructions that are indicated to be merged must have their corresponding
coverage expressions (
CovExp) combined in a pairwise fashion.e.g. A pair of branch expressions that should be merged:
BranchExp(a, b),BranchExp(c, d)Becomes:
BranchExp(a | c, b | d)This is distinct from the previous merge operation on BranchExp which
simply joined the branches of the two objects (this has been renamed to
concatenate).
Part of #12696.