[ForEachLoopUnroll] Fix move_value handling.

Author: nate-chandler

lib/SILOptimizer/LoopTransforms/ForEachLoopUnroll.cpp

@@ -307,7 +307,7 @@ void ArrayInfo::classifyUsesOfArray(SILValue arrayValue) {
       forEachCalls.insert(forEachCall);
       continue;
     }
-    // Recursively classify begin_borrow and copy_value uses.
+    // Recursively classify begin_borrow, copy_value, and move_value uses.
     if (BeginBorrowInst *beginBorrow = dyn_cast<BeginBorrowInst>(user)) {
       classifyUsesOfArray(beginBorrow);
       continue;
@@ -316,6 +316,10 @@ void ArrayInfo::classifyUsesOfArray(SILValue arrayValue) {
       classifyUsesOfArray(copyValue);
       continue;
     }
+    if (MoveValueInst *moveValue = dyn_cast<MoveValueInst>(user)) {
+      classifyUsesOfArray(moveValue);
+      continue;
+    }
     if (DestroyValueInst *destroyValue = dyn_cast<DestroyValueInst>(user)) {
       destroys.push_back(destroyValue);
       continue;