commit aab841cf63c6a00d613f4d5836181f645c6ea626
author Devang Patel <dpatel@apple.com> Wed Aug 03 23:13:55 2011 +0000
committer Devang Patel <dpatel@apple.com> Wed Aug 03 23:13:55 2011 +0000
tree 20f0e7455cbc06f2a2ce682b37693dc4ba6b2815
parent 3c7e9ee480b4a9b4bc1bd1b8a0fae85d6f0a9462

Do not drop undef debug values. These are used as range termination marker by live debug variable pass.

llvm-svn: 136834

llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index bedc310..438667e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4515,7 +4515,7 @@
     // debug info exists.
     ++SDNodeOrder;
     SDDbgValue *SDV;
-    if (isa<ConstantInt>(V) || isa<ConstantFP>(V)) {
+    if (isa<ConstantInt>(V) || isa<ConstantFP>(V) || isa<UndefValue>(V)) {
       SDV = DAG.getDbgValue(Variable, V, Offset, dl, SDNodeOrder);
       DAG.AddDbgValue(SDV, 0, false);
     } else {