StackPromotion: support OSSA

Author: eeckstein

lib/SILOptimizer/Transforms/StackPromotion.cpp

@@ -55,9 +55,6 @@ class StackPromotion : public SILFunctionTransform {
 
 void StackPromotion::run() {
   SILFunction *F = getFunction();
-  // FIXME: We should be able to support ownership.
-  if (F->hasOwnership())
-    return;
 
   LLVM_DEBUG(llvm::dbgs() << "** StackPromotion in " << F->getName() << " **\n");