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diff --git a/Collapse file
‎cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowNodes.qll‎
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+21-3Lines changed: 21 additions & 3 deletions b/Collapse file
‎cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowNodes.qll‎
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+21-3Lines changed: 21 additions & 3 deletions
diff --git a/Collapse file
‎cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/TaintTrackingUtil.qll‎
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+5Lines changed: 5 additions & 0 deletions b/Collapse file
‎cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/TaintTrackingUtil.qll‎
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+5Lines changed: 5 additions & 0 deletions
@@ -926,19 +926,25 @@ module Public {
   }
 
   /**
-   * DEPRECATED: See UninitializedNode.
-   *
    * Gets the `Node` corresponding to the value of an uninitialized local
    * variable `v`.
    */
-  Node uninitializedNode(LocalVariable v) { none() }
+  Node uninitializedNode(LocalVariable v) { result.asUninitialized() = v }
 
+  /**
+   * Holds if `indirectOperand` is the dataflow node that represents the
+   * indirection of `operand` with indirection index `indirectionIndex`.
+   */
   predicate hasOperandAndIndex(
     IndirectOperand indirectOperand, Operand operand, int indirectionIndex
   ) {
     indirectOperand.hasOperandAndIndirectionIndex(operand, indirectionIndex)
   }
 
+  /**
+   * Holds if `indirectInstr` is the dataflow node that represents the
+   * indirection of `instr` with indirection index `indirectionIndex`.
+   */
   predicate hasInstructionAndIndex(
     IndirectInstruction indirectInstr, Instruction instr, int indirectionIndex
   ) {
@@ -1054,12 +1060,24 @@ abstract private class PartialDefinitionNode extends PostUpdateNode {
 class IndirectArgumentOutNode extends PostUpdateNodeImpl {
   override ArgumentOperand operand;
 
+  /**
+   * Gets the index of the argument that is associated with this post-
+   * update node.
+   */
   int getArgumentIndex() {
     exists(CallInstruction call | call.getArgumentOperand(result) = operand)
   }
 
+  /**
+   * Gets the `Operand` that represents the address of the value that is being
+   * updated.
+   */
   Operand getAddressOperand() { result = operand }
 
+  /**
+   * Gets the `CallInstruction` that represents the call that updated the
+   * argument.
+   */
   CallInstruction getCallInstruction() { result.getAnArgumentOperand() = operand }
 
   /**
 
@@ -14,6 +14,11 @@ cached
 private module Cached {
   private import DataFlowImplCommon as DataFlowImplCommon
 
+  /**
+   * This predicate exists to collapse the `cached` predicates in this module with the
+   * `cached` predicates in other C/C++ dataflow files, which is then collapsed
+   * with the `cached` predicates in `DataFlowImplCommon.qll`.
+   */
   cached
   predicate forceCachingInSameStage() { DataFlowImplCommon::forceCachingInSameStage() }