Merge pull request #7830 from MathiasVP/fix-ir-reevaluation-in-return-stack-allocated-memory

C++: Fix re-evaluation in `cpp/return-stack-allocated-memory`

Author: MathiasVP

cpp/ql/src/Likely Bugs/Memory Management/ReturnStackAllocatedMemory.ql

@@ -14,6 +14,9 @@
  */
 
 import cpp
+// We don't actually use the global value numbering library in this query, but without it we end up
+// recomputing the IR.
+private import semmle.code.cpp.valuenumbering.GlobalValueNumbering
 import semmle.code.cpp.ir.IR
 import semmle.code.cpp.ir.dataflow.DataFlow::DataFlow