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-rw-r--r--llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index baf4d192c57..b534a4e81a1 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -104,6 +104,9 @@ createGCNMaxOccupancyMachineScheduler(MachineSchedContext *C) {
new ScheduleDAGMILive(C, make_unique<GCNMaxOccupancySchedStrategy>(C));
const SIInstrInfo *TII = static_cast<const SIInstrInfo *>(DAG->TII);
+
+ DAG->addMutation(createCopyConstrainDAGMutation(TII, DAG->TRI));
+
if (TII->enableClusterLoads())
DAG->addMutation(createLoadClusterDAGMutation(TII, DAG->TRI));
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