Definite initialization for initializers relying on a separate ivar initializer.

When we decide to emit a separate ivar initializer method (via the
Objective-C entry point -.cxx_construct), we no longer initialize the
ivars within the initializer. This only happens for derived classes,
so teach DI about uninitialized 'self' values that require a
super.init call but don't require the ivars to be initialized.



Swift SVN r12240

lib/SILPasses/DIMemoryUseCollector.cpp

@@ -78,7 +78,14 @@ DIMemoryObjectInfo::DIMemoryObjectInfo(SILInstruction *MI) {
     NumElements = 1;
     return;
   }
-  
+
+  // If this is a derived class init method for which stored properties are
+  // separately initialized, track an element for the super.init call.
+  if (isDerivedClassSelfOnly()) {
+    NumElements = 1;
+    return;
+  }
+
   // Otherwise, we break down the initializer.
   NumElements = getElementCountRec(getType(), IsSelfOfNonDelegatingInitializer);