diff --git a/clang/lib/AST/APValue.cpp b/clang/lib/AST/APValue.cpp
--- a/clang/lib/AST/APValue.cpp
+++ b/clang/lib/AST/APValue.cpp
@@ -390,11 +390,13 @@
 }
 
 APValue &APValue::operator=(APValue &&RHS) {
-  if (Kind != None && Kind != Indeterminate)
-    DestroyDataAndMakeUninit();
-  Kind = RHS.Kind;
-  Data = RHS.Data;
-  RHS.Kind = None;
+  if (this != &RHS) {
+    if (Kind != None && Kind != Indeterminate)
+      DestroyDataAndMakeUninit();
+    Kind = RHS.Kind;
+    Data = RHS.Data;
+    RHS.Kind = None;
+  }
   return *this;
 }
 
diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
--- a/clang/lib/CodeGen/CGDebugInfo.h
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -835,8 +835,10 @@
 
   // Define copy assignment operator.
   ApplyDebugLocation &operator=(ApplyDebugLocation &&Other) {
-    CGF = Other.CGF;
-    Other.CGF = nullptr;
+    if (this != &Other) {
+      CGF = Other.CGF;
+      Other.CGF = nullptr;
+    }
     return *this;
   }
 
diff --git a/clang/lib/Interpreter/Value.cpp b/clang/lib/Interpreter/Value.cpp
--- a/clang/lib/Interpreter/Value.cpp
+++ b/clang/lib/Interpreter/Value.cpp
@@ -201,16 +201,17 @@
 }
 
 Value &Value::operator=(Value &&RHS) noexcept {
-  if (IsManuallyAlloc)
-    ValueStorage::getFromPayload(getPtr())->Release();
+  if (this != &RHS) {
+    if (IsManuallyAlloc)
+      ValueStorage::getFromPayload(getPtr())->Release();
 
-  Interp = std::exchange(RHS.Interp, nullptr);
-  OpaqueType = std::exchange(RHS.OpaqueType, nullptr);
-  ValueKind = std::exchange(RHS.ValueKind, K_Unspecified);
-  IsManuallyAlloc = std::exchange(RHS.IsManuallyAlloc, false);
-
-  Data = RHS.Data;
+    Interp = std::exchange(RHS.Interp, nullptr);
+    OpaqueType = std::exchange(RHS.OpaqueType, nullptr);
+    ValueKind = std::exchange(RHS.ValueKind, K_Unspecified);
+    IsManuallyAlloc = std::exchange(RHS.IsManuallyAlloc, false);
 
+    Data = RHS.Data;
+  }
   return *this;
 }