C++: Expose 'isBusyDef'.

Author: MathiasVP

cpp/ql/lib/semmle/code/cpp/ir/implementation/aliased_ssa/internal/AliasedSSA.qll

@@ -874,7 +874,7 @@ private int numberOfOverlappingUses(MemoryLocation0 def) {
  * Holds if `def` is a busy definition. That is, it has a large number of
  * overlapping uses.
  */
-private predicate isBusyDef(MemoryLocation0 def) { numberOfOverlappingUses(def) > 1024 }
+predicate isBusyDef(MemoryLocation0 def) { numberOfOverlappingUses(def) > 1024 }
 
 /** Holds if `use` is a use that overlaps with a busy definition. */
 private predicate useOverlapWithBusyDef(MemoryLocation0 use) {

cpp/ql/lib/semmle/code/cpp/ir/implementation/unaliased_ssa/internal/SimpleSSA.qll

@@ -143,3 +143,9 @@ int getStartBitOffset(MemoryLocation location) { none() }
 
 /** Gets the end bit offset of a `MemoryLocation`, if any. */
 int getEndBitOffset(MemoryLocation location) { none() }
+
+/**
+ * Holds if `def` is a busy definition. That is, it has a large number of
+ * overlapping uses.
+ */
+predicate isBusyDef(MemoryLocation def) { none() }