Revert "UseListOrder: Remove move assignment"

This reverts commit r214260.  Turns out move assignment *is* necessary
for MSVC [1].

[1]: http://bb.pgr.jp/builders/ninja-clang-i686-msc17-R/builds/9631

llvm-svn: 214264

diff --git a/llvm/include/llvm/IR/UseListOrder.h b/llvm/include/llvm/IR/UseListOrder.h
index 7c4ba07..f766231 100644 (file)
--- a/llvm/include/llvm/IR/UseListOrder.h
+++ b/llvm/include/llvm/IR/UseListOrder.h
@@ -54,12 +54,15 @@ class UseListShuffleVector {
   UseListShuffleVector(const UseListShuffleVector &X) LLVM_DELETED_FUNCTION;
   UseListShuffleVector &
   operator=(const UseListShuffleVector &X) LLVM_DELETED_FUNCTION;
-  UseListShuffleVector &
-  operator=(UseListShuffleVector &&X) LLVM_DELETED_FUNCTION;
 
 public:
   UseListShuffleVector() : Size(0) {}
   UseListShuffleVector(UseListShuffleVector &&X) { moveUnchecked(X); }
+  UseListShuffleVector &operator=(UseListShuffleVector &&X) {
+    destroy();
+    moveUnchecked(X);
+    return *this;
+  }
   explicit UseListShuffleVector(size_t Size) : Size(Size) {
     if (!isSmall())
       Storage.Ptr = new unsigned[Size];
@@ -90,11 +93,16 @@ struct UseListOrder {
   UseListOrder() : V(0), F(0) {}
   UseListOrder(UseListOrder &&X)
       : V(X.V), F(X.F), Shuffle(std::move(X.Shuffle)) {}
+  UseListOrder &operator=(UseListOrder &&X) {
+    V = X.V;
+    F = X.F;
+    Shuffle = std::move(X.Shuffle);
+    return *this;
+  }
 
 private:
   UseListOrder(const UseListOrder &X) LLVM_DELETED_FUNCTION;
   UseListOrder &operator=(const UseListOrder &X) LLVM_DELETED_FUNCTION;
-  UseListOrder &operator=(UseListOrder &&X) LLVM_DELETED_FUNCTION;
 };
 
 typedef std::vector<UseListOrder> UseListOrderStack;