Add support for undef

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17055 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/Analysis/DataStructure/Local.cpp b/lib/Analysis/DataStructure/Local.cpp
index b497c3849c..473fb630dc 100644
--- a/lib/Analysis/DataStructure/Local.cpp
+++ b/lib/Analysis/DataStructure/Local.cpp
@@ -246,6 +246,9 @@ DSNodeHandle GraphBuilder::getValueDest(Value &Val) {
     } else if (ConstantIntegral *CI = dyn_cast<ConstantIntegral>(C)) {
       // Random constants are unknown mem
       return NH = createNode()->setUnknownNodeMarker();
+    } else if (isa<UndefValue>(C)) {
+      ScalarMap.erase(V);
+      return 0;
     } else {
       assert(0 && "Unknown constant type!");
     }