[PATCH] D34959: [AArch64] Only run macro fusion for CPUs with any fusion support.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
Herald added subscribers: kristof.beyls, rengolin, aemerson.

https://reviews.llvm.org/D34959

Files:
  lib/Target/AArch64/AArch64TargetMachine.cpp


Index: lib/Target/AArch64/AArch64TargetMachine.cpp
===================================================================
--- lib/Target/AArch64/AArch64TargetMachine.cpp
+++ lib/Target/AArch64/AArch64TargetMachine.cpp
@@ -277,10 +277,12 @@
 
   ScheduleDAGInstrs *
   createMachineScheduler(MachineSchedContext *C) const override {
+    const AArch64Subtarget &ST = C->MF->getSubtarget<AArch64Subtarget>();
     ScheduleDAGMILive *DAG = createGenericSchedLive(C);
     DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI));
     DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI));
-    DAG->addMutation(createAArch64MacroFusionDAGMutation());
+    if (ST.hasFusion())
+      DAG->addMutation(createAArch64MacroFusionDAGMutation());
     return DAG;
   }
 


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