1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 321c3f4b02..4076e3b1b1 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -3669,6 +3669,24 @@ ARMBaseInstrInfo::getOperandLatency(const InstrItineraryData *ItinData,
   return Latency;
 }
 
+unsigned ARMBaseInstrInfo::getPredicationCost(const MachineInstr *MI) const {
+   if (MI->isCopyLike() || MI->isInsertSubreg() ||
+      MI->isRegSequence() || MI->isImplicitDef())
+    return 0;
+
+  if (MI->isBundle())
+    return 0;
+
+  const MCInstrDesc &MCID = MI->getDesc();
+
+  if (MCID.isCall() || MCID.hasImplicitDefOfPhysReg(ARM::CPSR)) {
+    // When predicated, CPSR is an additional source operand for CPSR updating
+    // instructions, this apparently increases their latencies.
+    return 1;
+  }
+  return 0;
+}
+
 unsigned ARMBaseInstrInfo::getInstrLatency(const InstrItineraryData *ItinData,
                                            const MachineInstr *MI,
                                            unsigned *PredCost) const {