Fix a bug Sabre was having where the DAG root was a group. The group dominator
needed to be added to the ordering list, not the first member of the group.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24816 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index ef90fc0..03a0dd1 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -682,7 +682,12 @@
/// Note that the ordering in the Nodes vector is reversed.
void SimpleSched::VisitAll() {
// Add first element to list
- Ordering.push_back(getNI(DAG.getRoot().Val));
+ NodeInfo *NI = getNI(DAG.getRoot().Val);
+ if (NI->isInGroup()) {
+ Ordering.push_back(NI->Group->getDominator());
+ } else {
+ Ordering.push_back(NI);
+ }
// Iterate through all nodes that have been added
for (unsigned i = 0; i < Ordering.size(); i++) { // note: size() varies