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-rw-r--r--llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
index 08d6702fc81..4b6469b5d06 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
@@ -71,7 +71,9 @@ void ScheduleDAGSDNodes::BuildSchedUnits() {
// Reserve entries in the vector for each of the SUnits we are creating. This
// ensure that reallocation of the vector won't happen, so SUnit*'s won't get
// invalidated.
- SUnits.reserve(DAG->allnodes_size());
+ // FIXME: Multiply by 2 because we may clone nodes during scheduling.
+ // This is a temporary workaround.
+ SUnits.reserve(DAG->allnodes_size() * 2);
// During scheduling, the NodeId field of SDNode is used to map SDNodes
// to their associated SUnits by holding SUnits table indices. A value
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