From ab8cacee2df7cdb5da39a93e3d9aad330cb988a9 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Fri, 2 May 2008 22:13:33 +0000
Subject: [PATCH] Add assert.

llvm-svn: 50596
---
 llvm/lib/Analysis/IPA/CallGraphSCCPass.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/Analysis/IPA/CallGraphSCCPass.cpp b/llvm/lib/Analysis/IPA/CallGraphSCCPass.cpp
index 90e26266f8ba..99954d632d4d 100644
--- a/llvm/lib/Analysis/IPA/CallGraphSCCPass.cpp
+++ b/llvm/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.