[Typechecker] Simplify StorageImplInfo code in finishPropertyWrapperImplInfo and check for AccessorKind in synthesizeCoroutineAccessorBody

Author: theblixguy

lib/Sema/TypeCheckStorage.cpp

@@ -1585,7 +1585,7 @@ synthesizeCoroutineAccessorBody(AccessorDecl *accessor, ASTContext &ctx) {
 
   // If this is a variable with an attached property wrapper, then
   // the accessors need to yield the wrappedValue or projectedValue.
-  if (storage->getReadImpl() == ReadImplKind::Read ||
+  if (accessor->getAccessorKind() == AccessorKind::Read ||
       storageReadWriteImpl == ReadWriteImplKind::Modify) {
     if (auto var = dyn_cast<VarDecl>(storage)) {
       if (var->hasAttachedPropertyWrapper()) {
@@ -2582,15 +2582,16 @@ static void finishPropertyWrapperImplInfo(VarDecl *var,
     }
   }
 
-  if (wrapperSetterIsUsable) {
-    if (var->hasObservers()) {
-      info = StorageImplInfo::getMutableComputed();
-      return;
-    }
+  if (!wrapperSetterIsUsable) {
+    info = StorageImplInfo::getImmutableComputed();
+    return;
+  }
+
+  if (var->hasObservers()) {
+    info = StorageImplInfo::getMutableComputed();
+  } else {
     info = StorageImplInfo(ReadImplKind::Get, WriteImplKind::Set,
                            ReadWriteImplKind::Modify);
-  } else {
-    info = StorageImplInfo::getImmutableComputed();
   }
 }