diff --git a/include/swift/Serialization/ModuleFormat.h b/include/swift/Serialization/ModuleFormat.h
index 8d30b2b..4982edf 100644
--- a/include/swift/Serialization/ModuleFormat.h
+++ b/include/swift/Serialization/ModuleFormat.h
@@ -54,7 +54,7 @@
 /// in source control, you should also update the comment to briefly
 /// describe what change you made. The content of this comment isn't important;
 /// it just ensures a conflict if two people change the module format.
-const uint16_t VERSION_MINOR = 279; // Last change: copy_value, destroy_value
+const uint16_t VERSION_MINOR = 280; // Last change: function qualified ownership
 
 using DeclID = PointerEmbeddedInt<unsigned, 31>;
 using DeclIDField = BCFixed<31>;
diff --git a/lib/Serialization/DeserializeSIL.cpp b/lib/Serialization/DeserializeSIL.cpp
index cd81a31..ad7c1b3 100644
--- a/lib/Serialization/DeserializeSIL.cpp
+++ b/lib/Serialization/DeserializeSIL.cpp
@@ -380,13 +380,13 @@
   DeclID clangNodeOwnerID;
   TypeID funcTyID;
   unsigned rawLinkage, isTransparent, isFragile, isThunk, isGlobal,
-    inlineStrategy, effect, numSpecAttrs;
+      inlineStrategy, effect, numSpecAttrs, hasQualifiedOwnership;
   ArrayRef<uint64_t> SemanticsIDs;
   // TODO: read fragile
   SILFunctionLayout::readRecord(scratch, rawLinkage, isTransparent, isFragile,
                                 isThunk, isGlobal, inlineStrategy, effect,
-                                numSpecAttrs, funcTyID, clangNodeOwnerID,
-                                SemanticsIDs);
+                                numSpecAttrs, hasQualifiedOwnership, funcTyID,
+                                clangNodeOwnerID, SemanticsIDs);
 
   if (funcTyID == 0) {
     DEBUG(llvm::dbgs() << "SILFunction typeID is 0.\n");
@@ -454,6 +454,8 @@
     for (auto ID : SemanticsIDs) {
       fn->addSemanticsAttr(MF->getIdentifier(ID).str());
     }
+    if (!hasQualifiedOwnership)
+      fn->setUnqualifiedOwnership();
 
     if (Callback) Callback->didDeserialize(MF->getAssociatedModule(), fn);
   }
@@ -538,7 +540,6 @@
   LocalValues.clear();
   ForwardLocalValues.clear();
 
-  FunctionOwnershipEvaluator OwnershipEvaluator(fn);
   SILOpenedArchetypesTracker OpenedArchetypesTracker(*fn);
   SILBuilder Builder(*fn);
   // Track the archetypes just like SILGen. This
@@ -572,8 +573,7 @@
         return fn;
 
       // Handle a SILInstruction record.
-      if (readSILInstruction(fn, CurrentBB, Builder, OwnershipEvaluator, kind,
-                             scratch)) {
+      if (readSILInstruction(fn, CurrentBB, Builder, kind, scratch)) {
         DEBUG(llvm::dbgs() << "readSILInstruction returns error.\n");
         MF->error();
         return fn;
@@ -659,10 +659,10 @@
   return DRef;
 }
 
-bool SILDeserializer::readSILInstruction(
-    SILFunction *Fn, SILBasicBlock *BB, SILBuilder &Builder,
-    FunctionOwnershipEvaluator &OwnershipEvaluator, unsigned RecordKind,
-    SmallVectorImpl<uint64_t> &scratch) {
+bool SILDeserializer::readSILInstruction(SILFunction *Fn, SILBasicBlock *BB,
+                                         SILBuilder &Builder,
+                                         unsigned RecordKind,
+                                         SmallVectorImpl<uint64_t> &scratch) {
   // Return error if Basic Block is null.
   if (!BB)
     return true;
@@ -1900,11 +1900,6 @@
     llvm_unreachable("todo");
   }
 
-  // Evaluate ResultVal's ownership. If we find that as a result of ResultVal,
-  // we are mixing qualified and unqualified ownership instructions, bail.
-  if (!OwnershipEvaluator.evaluate(ResultVal))
-    return true;
-
   if (ResultVal->hasValue()) {
     LastValueID = LastValueID + 1;
     setLocalValue(ResultVal, LastValueID);
@@ -1973,12 +1968,12 @@
   DeclID clangOwnerID;
   TypeID funcTyID;
   unsigned rawLinkage, isTransparent, isFragile, isThunk, isGlobal,
-    inlineStrategy, effect, numSpecAttrs;
+    inlineStrategy, effect, numSpecAttrs, hasQualifiedOwnership;
   ArrayRef<uint64_t> SemanticsIDs;
   SILFunctionLayout::readRecord(scratch, rawLinkage, isTransparent, isFragile,
                                 isThunk, isGlobal, inlineStrategy, effect,
-                                numSpecAttrs, funcTyID, clangOwnerID,
-                                SemanticsIDs);
+                                numSpecAttrs, hasQualifiedOwnership, funcTyID,
+                                clangOwnerID, SemanticsIDs);
   auto linkage = fromStableSILLinkage(rawLinkage);
   if (!linkage) {
     DEBUG(llvm::dbgs() << "invalid linkage code " << rawLinkage
diff --git a/lib/Serialization/DeserializeSIL.h b/lib/Serialization/DeserializeSIL.h
index 1e06332..9b0cafd 100644
--- a/lib/Serialization/DeserializeSIL.h
+++ b/lib/Serialization/DeserializeSIL.h
@@ -11,7 +11,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "SILFormat.h"
-#include "swift/SIL/InstructionUtils.h"
 #include "swift/SIL/SILModule.h"
 #include "swift/Serialization/ModuleFile.h"
 #include "swift/Serialization/SerializedSILLoader.h"
@@ -84,7 +83,6 @@
     /// Read a SIL instruction within a given SIL basic block.
     bool readSILInstruction(SILFunction *Fn, SILBasicBlock *BB,
                             SILBuilder &Builder,
-                            FunctionOwnershipEvaluator &OwnershipEvaluator,
                             unsigned RecordKind,
                             SmallVectorImpl<uint64_t> &scratch);
 
diff --git a/lib/Serialization/SILFormat.h b/lib/Serialization/SILFormat.h
index 3cba3bb..50758ac 100644
--- a/lib/Serialization/SILFormat.h
+++ b/lib/Serialization/SILFormat.h
@@ -238,15 +238,16 @@
 
   using SILFunctionLayout =
       BCRecordLayout<SIL_FUNCTION, SILLinkageField,
-                     BCFixed<1>, // transparent
-                     BCFixed<1>, // fragile
-                     BCFixed<2>, // thunk/reabstraction_thunk
-                     BCFixed<1>, // global_init
-                     BCFixed<2>, // inlineStrategy
-                     BCFixed<2>, // side effect info.
-                     BCFixed<2>, // number of specialize attributes
-                     TypeIDField,// SILFunctionType
-                     DeclIDField,// ClangNode owner
+                     BCFixed<1>,  // transparent
+                     BCFixed<1>,  // fragile
+                     BCFixed<2>,  // thunk/reabstraction_thunk
+                     BCFixed<1>,  // global_init
+                     BCFixed<2>,  // inlineStrategy
+                     BCFixed<2>,  // side effect info.
+                     BCFixed<2>,  // number of specialize attributes
+                     BCFixed<1>,  // has qualified ownership
+                     TypeIDField, // SILFunctionType
+                     DeclIDField, // ClangNode owner
                      BCArray<IdentifierIDField> // Semantics Attribute
                      // followed by specialize attributes
                      // followed by generic param list, if any
diff --git a/lib/Serialization/SerializeSIL.cpp b/lib/Serialization/SerializeSIL.cpp
index ed29901..c1bc9e4 100644
--- a/lib/Serialization/SerializeSIL.cpp
+++ b/lib/Serialization/SerializeSIL.cpp
@@ -358,7 +358,8 @@
       (unsigned)F.isTransparent(), (unsigned)F.isFragile(),
       (unsigned)F.isThunk(), (unsigned)F.isGlobalInit(),
       (unsigned)F.getInlineStrategy(), (unsigned)F.getEffectsKind(),
-      (unsigned)numSpecAttrs, FnID, clangNodeOwnerID, SemanticsIDs);
+      (unsigned)numSpecAttrs, (unsigned)F.hasQualifiedOwnership(), FnID,
+      clangNodeOwnerID, SemanticsIDs);
 
   if (NoBody)
     return;