Fix for -pre-RA-sched=source.

Yet another case of unchecked NULL node (for physreg copy).
May fix PR9509.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128266 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
index f02d78f6134d526886a0a203cf937c8ca70436d4..f5a5db89fa0c9c848f1fddcedb785e015eb4f119 100644 (file)
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
@@ -1500,6 +1500,8 @@ public:
   unsigned getNodePriority(const SUnit *SU) const;
 
   unsigned getNodeOrdering(const SUnit *SU) const {
+    if (!SU->getNode()) return 0;
+
     return scheduleDAG->DAG->GetOrdering(SU->getNode());
   }