Use getValue() for PHINodes when direct NodeMap access does not work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103126 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index a38b204..57aa2fe 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3900,6 +3900,8 @@
SDV = DAG.getDbgValue(Variable, V, Offset, dl, SDNodeOrder);
DAG.AddDbgValue(SDV, 0, false);
} else {
+ bool createUndef = false;
+ // FIXME : Why not use getValue() directly ?
SDValue &N = NodeMap[V];
if (N.getNode()) {
if (!EmitFuncArgumentDbgValue(DI, V, Variable, Offset, N)) {
@@ -3907,7 +3909,19 @@
N.getResNo(), Offset, dl, SDNodeOrder);
DAG.AddDbgValue(SDV, N.getNode(), false);
}
- } else {
+ } else if (isa<PHINode>(V) && !V->use_empty()) {
+ SDValue N = getValue(V);
+ if (N.getNode()) {
+ if (!EmitFuncArgumentDbgValue(DI, V, Variable, Offset, N)) {
+ SDV = DAG.getDbgValue(Variable, N.getNode(),
+ N.getResNo(), Offset, dl, SDNodeOrder);
+ DAG.AddDbgValue(SDV, N.getNode(), false);
+ }
+ } else
+ createUndef = true;
+ } else
+ createUndef = true;
+ if (createUndef) {
// We may expand this to cover more cases. One case where we have no
// data available is an unreferenced parameter; we need this fallback.
SDV = DAG.getDbgValue(Variable, UndefValue::get(V->getType()),