Revert a small part of 102372; this fixes at least one
of the dbg testsuite regressions. I don't think this is
really the right fix; this change exposed an existing problem
upstream somewhere.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102410 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index d663521..9d239c1 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3834,10 +3834,15 @@
return 0;
DAG.AddDbgValue(SDV, N.getNode(), isParameter);
} else {
+ // Generating Undefs here seems to be actively harmful because it
+ // affects the line numbers.
+ return 0;
+#if 0
// This isn't useful, but it shows what we're missing.
SDV = DAG.getDbgValue(Variable, UndefValue::get(Address->getType()),
0, dl, SDNodeOrder);
DAG.AddDbgValue(SDV, 0, isParameter);
+#endif
}
return 0;
}