Add assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50596 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/IPA/CallGraphSCCPass.cpp b/lib/Analysis/IPA/CallGraphSCCPass.cpp
index 90e26266f8ba886bbd3b82d3da81995034c545af..99954d632d4d9beb5b086253faf1de1dd10ba549 100644 (file)
--- a/lib/Analysis/IPA/CallGraphSCCPass.cpp
+++ b/lib/Analysis/IPA/CallGraphSCCPass.cpp
@@ -158,6 +158,7 @@ void CallGraphSCCPass::assignPassManager(PMStack &PMS,
          PMS.top()->getPassManagerType() > PMT_CallGraphPassManager)
     PMS.pop();
 
+  assert (!PMS.empty() && "Unable to handle Call Graph Pass");
   CGPassManager *CGP = dynamic_cast<CGPassManager *>(PMS.top());
 
   // Create new Call Graph SCC Pass Manager if it does not exist.