Enable the assert that got all this dominator work started.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index c83abd2..c185502 100644
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -44,7 +44,7 @@
   BasicBlock::iterator BIP = Builder.GetInsertPoint();
 
   // FIXME: enable once our implementation of dominates is fixed.
-  //  assert(BIP == IP || SE.DT->dominates(IP, BIP));
+  assert(BIP == IP || SE.DT->dominates(IP, BIP));
 
   // Check to see if there is already a cast!
   for (Value::use_iterator UI = V->use_begin(), E = V->use_end();