[ODL] Visit autorelease_value insts.

No update is needed for the values they produce.  This pass should
really be refactored not to crash on instructions that aren't explicitly
listed or at least not to compile if not every instruction is listed.

rdar://161371112

Author: nate-chandler

lib/SILOptimizer/Mandatory/MoveOnlyWrappedTypeEliminator.cpp

@@ -208,6 +208,7 @@ struct SILMoveOnlyWrappedTypeEliminatorVisitor
   NO_UPDATE_NEEDED(AddressToPointer)
   NO_UPDATE_NEEDED(AllocBox)
   NO_UPDATE_NEEDED(AllocStack)
+  NO_UPDATE_NEEDED(AutoreleaseValue)
   NO_UPDATE_NEEDED(BeginAccess)
   NO_UPDATE_NEEDED(Branch)
   NO_UPDATE_NEEDED(BridgeObjectToRef)

validation-test/SILOptimizer/rdar161371112.swift

@@ -0,0 +1,41 @@
+// RUN: %empty-directory(%t)
+// RUN: split-file %s %t
+// RUN: %target-swift-frontend \
+// RUN:     %t/Library.swift \
+// RUN:     -enable-experimental-feature Lifetimes \
+// RUN:     -sil-verify-all \
+// RUN:     -verify \
+// RUN:     -emit-sil \
+// RUN:     -import-objc-header %t/Header.h \
+// RUN: > /dev/null
+
+// REQUIRES: objc_interop
+
+// REQUIRES: swift_feature_Lifetimes
+
+//--- Header.h
+
+@import Foundation;
+
+@interface Foo : NSObject
+@property (nonatomic, readwrite) NSInteger length;
+- (const unichar *)_fastCharacterContents NS_RETURNS_INNER_POINTER;
+@end
+
+//--- Library.swift
+
+extension Foo {
+    var utf16Span: Span<UInt16>? {
+        @_lifetime(borrow self)
+        borrowing get {
+            // FIXME: This error shouldn't be here.
+            guard let ptr = self._fastCharacterContents() else { // expected-error{{copy of noncopyable typed value}}
+                return nil
+            }
+            let length = self.length
+            let buffer = UnsafeBufferPointer(start: ptr, count: length)
+            let span = unsafe Span<UInt16>(_unsafeElements: buffer)
+            return _overrideLifetime(span, borrowing: self)
+        }
+    }
+}