Count constraint-solving memory more precisely, rdar://29684330

lib/Sema/ConstraintSystem.cpp

@@ -1650,3 +1650,16 @@ Type Solution::simplifyType(Type type) const {
         return known->second;
       });
 }
+
+size_t Solution::getTotalMemory() const {
+  return sizeof(*this) +
+    typeBindings.getMemorySize() +
+    overloadChoices.getMemorySize() +
+    ConstraintRestrictions.getMemorySize() +
+    llvm::capacity_in_bytes(Fixes) +
+    DisjunctionChoices.getMemorySize() +
+    OpenedTypes.getMemorySize() +
+    OpenedExistentialTypes.getMemorySize() +
+    (DefaultedConstraints.size() * sizeof(void*));
+}
+