Add a temporary flag: -enable-lifetime-dependence-insertion

To bootstrap lit tests until the stdlib builds with ~Escapable.

Author: atrick

lib/SILOptimizer/PassManager/PassPipeline.cpp

@@ -69,6 +69,13 @@ llvm::cl::opt<bool>
     EnableDeinitDevirtualizer("enable-deinit-devirtualizer", llvm::cl::init(false),
                           llvm::cl::desc("Enable the DestroyHoisting pass."));
 
+// Temporary flag until the stdlib builds with ~Escapable
+llvm::cl::opt<bool>
+EnableLifetimeDependenceInsertion(
+  "enable-lifetime-dependence-insertion", llvm::cl::init(false),
+  llvm::cl::desc("Enable lifetime dependence insertion."));
+
+// Temporary flag until the stdlib builds with ~Escapable
 llvm::cl::opt<bool>
 EnableLifetimeDependenceDiagnostics(
   "enable-lifetime-dependence-diagnostics", llvm::cl::init(false),
@@ -291,7 +298,7 @@ SILPassPipelinePlan::getSILGenPassPipeline(const SILOptions &Options) {
   P.startPipeline("SILGen Passes");
 
   P.addSILGenCleanup();
-  if (EnableLifetimeDependenceDiagnostics) {
+  if (EnableLifetimeDependenceDiagnostics || EnableLifetimeDependenceInsertion) {
     P.addLifetimeDependenceInsertion();
   }
   if (SILViewSILGenCFG) {