#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetInstrItineraries.h"
using namespace llvm;
if (!ItinData || ItinData->isEmpty())
return;
- ++IssueCount;
-
- unsigned cycle = 0;
-
// Use the itinerary for the underlying instruction to reserve FU's
// in the scoreboard at the appropriate future cycles.
const TargetInstrDesc *TID = DAG->getInstrDesc(SU);
assert(TID && "The scheduler must filter non-machineinstrs");
+ if (DAG->TII->isZeroCost(TID->Opcode))
+ return;
+
+ ++IssueCount;
+
+ unsigned cycle = 0;
+
unsigned idx = TID->getSchedClass();
for (const InstrStage *IS = ItinData->beginStage(idx),
*E = ItinData->endStage(idx); IS != E; ++IS) {