Merge pull request swiftlang#21071 from gottesmm/pr-69c27fc73b3ad6caed7e8abba9ae887be6bb6a24

Author: swift-ci

lib/SILOptimizer/Transforms/OwnershipModelEliminator.cpp

@@ -28,9 +28,15 @@
 #include "swift/SIL/SILFunction.h"
 #include "swift/SIL/SILVisitor.h"
 #include "swift/SILOptimizer/PassManager/Transforms.h"
+#include "llvm/Support/CommandLine.h"
 
 using namespace swift;
 
+// Utility command line argument to dump the module before we eliminate
+// ownership from it.
+static llvm::cl::opt<std::string>
+DumpBefore("sil-dump-before-ome-to-path", llvm::cl::Hidden);
+
 //===----------------------------------------------------------------------===//
 //                               Implementation
 //===----------------------------------------------------------------------===//
@@ -282,6 +288,10 @@ namespace {
 
 struct OwnershipModelEliminator : SILModuleTransform {
   void run() override {
+    if (DumpBefore.size()) {
+      getModule()->dump(DumpBefore.c_str());
+    }
+
     for (auto &F : *getModule()) {
       // Don't rerun early lowering on deserialized functions.
       if (F.wasDeserializedCanonical())