"Unable to schedule <A> required by <B>" is more helpful then

"Unable to handle Pass that requires lower level Analysis pass"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51892 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index 8b525f67b576ca69046e47020b0df6ccae42b6a5..b44e10de95b641df092c8d5ad840857ee123c9e6 100644 (file)
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -930,7 +930,11 @@ void PMDataManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) {
   // When Pass manager is not able to order required analysis info, Pass manager
   // checks whether any lower level manager will be able to provide this 
   // analysis info on demand or not.
-  assert (0 && "Unable to handle Pass that requires lower level Analysis pass");
+#ifndef NDEBUG
+  cerr << "Unable to schedule " << RequiredPass->getPassName();
+  cerr << " required by " << P->getPassName() << "\n";
+#endif
+  assert (0 && "Unable to schedule pass");
 }
 
 // Destructor