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-rw-r--r--third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/analysis/TransferInput.java250
1 files changed, 0 insertions, 250 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/analysis/TransferInput.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/analysis/TransferInput.java
deleted file mode 100644
index f827ad302d..0000000000
--- a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/analysis/TransferInput.java
+++ /dev/null
@@ -1,250 +0,0 @@
-package org.checkerframework.dataflow.analysis;
-
-/*>>>
-import org.checkerframework.checker.nullness.qual.Nullable;
-*/
-
-import org.checkerframework.dataflow.cfg.node.Node;
-import org.checkerframework.dataflow.util.HashCodeUtils;
-
-/**
- * {@code TransferInput} is used as the input type of the individual transfer functions of a {@link
- * TransferFunction}. It also contains a reference to the node for which the transfer function will
- * be applied.
- *
- * <p>A {@code TransferInput} contains one or two stores. If two stores are present, one belongs to
- * 'then', and the other to 'else'.
- *
- * @author Stefan Heule
- * @param <S> the {@link Store} used to keep track of intermediate results
- */
-public class TransferInput<A extends AbstractValue<A>, S extends Store<S>> {
-
- /** The corresponding node. */
- protected Node node;
-
- /**
- * The regular result store (or {@code null} if none is present). The following invariant is
- * maintained:
- *
- * <pre>{@code
- * store == null &hArr; thenStore != null &amp;&amp; elseStore != null
- * }</pre>
- */
- protected final /*@Nullable*/ S store;
-
- /**
- * The 'then' result store (or {@code null} if none is present). The following invariant is
- * maintained:
- *
- * <pre>{@code
- * store == null &hArr; thenStore != null &amp;&amp; elseStore != null
- * }</pre>
- */
- protected final /*@Nullable*/ S thenStore;
-
- /**
- * The 'else' result store (or {@code null} if none is present). The following invariant is
- * maintained:
- *
- * <pre>{@code
- * store == null &hArr; thenStore != null &amp;&amp; elseStore != null
- * }</pre>
- */
- protected final /*@Nullable*/ S elseStore;
-
- /** The corresponding analysis class to get intermediate flow results. */
- protected final Analysis<A, S, ?> analysis;
-
- /**
- * Create a {@link TransferInput}, given a {@link TransferResult} and a node-value mapping.
- *
- * <p><em>Aliasing</em>: The stores returned by any methods of {@code to} will be stored
- * internally and are not allowed to be used elsewhere. Full control of them is transfered to
- * this object.
- *
- * <p>The node-value mapping {@code nodeValues} is provided by the analysis and is only read
- * from within this {@link TransferInput}.
- */
- public TransferInput(Node n, Analysis<A, S, ?> analysis, TransferResult<A, S> to) {
- node = n;
- this.analysis = analysis;
- if (to.containsTwoStores()) {
- thenStore = to.getThenStore();
- elseStore = to.getElseStore();
- store = null;
- } else {
- store = to.getRegularStore();
- thenStore = elseStore = null;
- }
- }
-
- /**
- * Create a {@link TransferInput}, given a store and a node-value mapping.
- *
- * <p><em>Aliasing</em>: The store {@code s} will be stored internally and is not allowed to be
- * used elsewhere. Full control over {@code s} is transfered to this object.
- *
- * <p>The node-value mapping {@code nodeValues} is provided by the analysis and is only read
- * from within this {@link TransferInput}.
- */
- public TransferInput(Node n, Analysis<A, S, ?> analysis, S s) {
- node = n;
- this.analysis = analysis;
- store = s;
- thenStore = elseStore = null;
- }
-
- /**
- * Create a {@link TransferInput}, given two stores and a node-value mapping.
- *
- * <p><em>Aliasing</em>: The two stores {@code s1} and {@code s2} will be stored internally and
- * are not allowed to be used elsewhere. Full control of them is transfered to this object.
- */
- public TransferInput(Node n, Analysis<A, S, ?> analysis, S s1, S s2) {
- node = n;
- this.analysis = analysis;
- thenStore = s1;
- elseStore = s2;
- store = null;
- }
-
- /** Copy constructor. */
- protected TransferInput(TransferInput<A, S> from) {
- this.node = from.node;
- this.analysis = from.analysis;
- if (from.store == null) {
- thenStore = from.thenStore.copy();
- elseStore = from.elseStore.copy();
- store = null;
- } else {
- store = from.store.copy();
- thenStore = elseStore = null;
- }
- }
-
- /** @return the {@link Node} for this {@link TransferInput}. */
- public Node getNode() {
- return node;
- }
-
- /**
- * @return the abstract value of {@link Node} {@code n}, which is required to be a 'sub-node'
- * (that is, a direct or indirect child) of the node this transfer input is associated with.
- * Furthermore, {@code n} cannot be a l-value node. Returns {@code null} if no value if
- * available.
- */
- public /*@Nullable*/ A getValueOfSubNode(Node n) {
- return analysis.getValue(n);
- }
-
- /**
- * @return the regular result store produced if no exception is thrown by the {@link Node}
- * corresponding to this transfer function result
- */
- public S getRegularStore() {
- if (store == null) {
- return thenStore.leastUpperBound(elseStore);
- } else {
- return store;
- }
- }
-
- /**
- * @return the result store produced if the {@link Node} this result belongs to evaluates to
- * {@code true}.
- */
- public S getThenStore() {
- if (store == null) {
- return thenStore;
- }
- return store;
- }
-
- /**
- * @return the result store produced if the {@link Node} this result belongs to evaluates to
- * {@code false}.
- */
- public S getElseStore() {
- if (store == null) {
- return elseStore;
- }
- // copy the store such that it is the same as the result of getThenStore
- // (that is, identical according to equals), but two different objects.
- return store.copy();
- }
-
- /**
- * @return {@code true} if and only if this transfer input contains two stores that are
- * potentially not equal. Note that the result {@code true} does not imply that {@code
- * getRegularStore} cannot be called (or vice versa for {@code false}). Rather, it indicates
- * that {@code getThenStore} or {@code getElseStore} can be used to give more precise
- * results. Otherwise, if the result is {@code false}, then all three methods {@code
- * getRegularStore}, {@code getThenStore}, and {@code getElseStore} return equivalent
- * stores.
- */
- public boolean containsTwoStores() {
- return (thenStore != null && elseStore != null);
- }
-
- /** @return an exact copy of this store. */
- public TransferInput<A, S> copy() {
- return new TransferInput<>(this);
- }
-
- /**
- * Compute the least upper bound of two stores.
- *
- * <p><em>Important</em>: This method must fulfill the same contract as {@code leastUpperBound}
- * of {@link Store}.
- */
- public TransferInput<A, S> leastUpperBound(TransferInput<A, S> other) {
- if (store == null) {
- S newThenStore = thenStore.leastUpperBound(other.getThenStore());
- S newElseStore = elseStore.leastUpperBound(other.getElseStore());
- return new TransferInput<>(node, analysis, newThenStore, newElseStore);
- } else {
- if (other.store == null) {
- // make sure we do not lose precision and keep two stores if at
- // least one of the two TransferInput's has two stores.
- return other.leastUpperBound(this);
- }
- return new TransferInput<>(
- node, analysis, store.leastUpperBound(other.getRegularStore()));
- }
- }
-
- @Override
- public boolean equals(Object o) {
- if (o != null && o instanceof TransferInput) {
- @SuppressWarnings("unchecked")
- TransferInput<A, S> other = (TransferInput<A, S>) o;
- if (containsTwoStores()) {
- if (other.containsTwoStores()) {
- return getThenStore().equals(other.getThenStore())
- && getElseStore().equals(other.getElseStore());
- }
- } else {
- if (!other.containsTwoStores()) {
- return getRegularStore().equals(other.getRegularStore());
- }
- }
- }
- return false;
- }
-
- @Override
- public int hashCode() {
- return HashCodeUtils.hash(
- this.analysis, this.node, this.store, this.thenStore, this.elseStore);
- }
-
- @Override
- public String toString() {
- if (store == null) {
- return "[then=" + thenStore + ", else=" + elseStore + "]";
- } else {
- return "[" + store + "]";
- }
- }
-}
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