CodeGen: Update LiveIntervalAnalysis API to use MachineInstr&, NFC

These parameters aren't expected to be null, so take them by reference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262151 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/LiveIntervalAnalysis.h

@@ -105,7 +105,7 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     // Calculate the spill weight to assign to a single instruction.
     static float getSpillWeight(bool isDef, bool isUse,
                                 const MachineBlockFrequencyInfo *MBFI,
-                                const MachineInstr *Instr);
+                                const MachineInstr &Instr);
 
     LiveInterval &getInterval(unsigned Reg) {
       if (hasInterval(Reg))
@@ -288,7 +288,7 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     /// are not supported.
     ///
     /// \param UpdateFlags Update live intervals for nonallocatable physregs.
-    void handleMove(MachineInstr* MI, bool UpdateFlags = false);
+    void handleMove(MachineInstr &MI, bool UpdateFlags = false);
 
     /// moveIntoBundle - Update intervals for operands of MI so that they
     /// begin/end on the SlotIndex for BundleStart.
@@ -298,7 +298,7 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
     /// Requires MI and BundleStart to have SlotIndexes, and assumes
     /// existing liveness is accurate. BundleStart should be the first
     /// instruction in the Bundle.
-    void handleMoveIntoBundle(MachineInstr* MI, MachineInstr* BundleStart,
+    void handleMoveIntoBundle(MachineInstr &MI, MachineInstr &BundleStart,
                               bool UpdateFlags = false);
 
     /// repairIntervalsInRange - Update live intervals for instructions in a

lib/CodeGen/CalcSpillWeights.cpp

@@ -170,8 +170,7 @@ VirtRegAuxInfo::calculateSpillWeightAndHint(LiveInterval &li) {
       // Calculate instr weight.
       bool reads, writes;
       std::tie(reads, writes) = mi->readsWritesVirtualRegister(li.reg);
-      weight = LiveIntervals::getSpillWeight(
-        writes, reads, &MBFI, mi);
+      weight = LiveIntervals::getSpillWeight(writes, reads, &MBFI, *mi);
 
       // Give extra weight to what looks like a loop induction variable update.
       if (writes && isExiting && LIS.isLiveOutOfMBB(li, mbb))

lib/CodeGen/LiveIntervalAnalysis.cpp

@@ -841,11 +841,10 @@ LiveIntervals::hasPHIKill(const LiveInterval &LI, const VNInfo *VNI) const {
   return false;
 }
 
-float
-LiveIntervals::getSpillWeight(bool isDef, bool isUse,
-                              const MachineBlockFrequencyInfo *MBFI,
-                              const MachineInstr *MI) {
-  BlockFrequency Freq = MBFI->getBlockFreq(MI->getParent());
+float LiveIntervals::getSpillWeight(bool isDef, bool isUse,
+                                    const MachineBlockFrequencyInfo *MBFI,
+                                    const MachineInstr &MI) {
+  BlockFrequency Freq = MBFI->getBlockFreq(MI.getParent());
   const float Scale = 1.0f / MBFI->getEntryFreq();
   return (isDef + isUse) * (Freq.getFrequency() * Scale);
 }
@@ -1391,26 +1390,26 @@ class LiveIntervals::HMEditor {
   }
 };
 
-void LiveIntervals::handleMove(MachineInstr* MI, bool UpdateFlags) {
-  assert(!MI->isBundled() && "Can't handle bundled instructions yet.");
-  SlotIndex OldIndex = Indexes->getInstructionIndex(*MI);
-  Indexes->removeMachineInstrFromMaps(*MI);
-  SlotIndex NewIndex = Indexes->insertMachineInstrInMaps(*MI);
-  assert(getMBBStartIdx(MI->getParent()) <= OldIndex &&
-         OldIndex < getMBBEndIdx(MI->getParent()) &&
+void LiveIntervals::handleMove(MachineInstr &MI, bool UpdateFlags) {
+  assert(!MI.isBundled() && "Can't handle bundled instructions yet.");
+  SlotIndex OldIndex = Indexes->getInstructionIndex(MI);
+  Indexes->removeMachineInstrFromMaps(MI);
+  SlotIndex NewIndex = Indexes->insertMachineInstrInMaps(MI);
+  assert(getMBBStartIdx(MI.getParent()) <= OldIndex &&
+         OldIndex < getMBBEndIdx(MI.getParent()) &&
          "Cannot handle moves across basic block boundaries.");
 
   HMEditor HME(*this, *MRI, *TRI, OldIndex, NewIndex, UpdateFlags);
-  HME.updateAllRanges(MI);
+  HME.updateAllRanges(&MI);
 }
 
-void LiveIntervals::handleMoveIntoBundle(MachineInstr* MI,
-                                         MachineInstr* BundleStart,
+void LiveIntervals::handleMoveIntoBundle(MachineInstr &MI,
+                                         MachineInstr &BundleStart,
                                          bool UpdateFlags) {
-  SlotIndex OldIndex = Indexes->getInstructionIndex(*MI);
-  SlotIndex NewIndex = Indexes->getInstructionIndex(*BundleStart);
+  SlotIndex OldIndex = Indexes->getInstructionIndex(MI);
+  SlotIndex NewIndex = Indexes->getInstructionIndex(BundleStart);
   HMEditor HME(*this, *MRI, *TRI, OldIndex, NewIndex, UpdateFlags);
-  HME.updateAllRanges(MI);
+  HME.updateAllRanges(&MI);
 }
 
 void LiveIntervals::repairOldRegInRange(const MachineBasicBlock::iterator Begin,
@@ -1427,18 +1426,19 @@ void LiveIntervals::repairOldRegInRange(const MachineBasicBlock::iterator Begin,
 
   for (MachineBasicBlock::iterator I = End; I != Begin;) {
     --I;
-    MachineInstr *MI = I;
-    if (MI->isDebugValue())
+    MachineInstr &MI = *I;
+    if (MI.isDebugValue())
       continue;
 
-    SlotIndex instrIdx = getInstructionIndex(*MI);
+    SlotIndex instrIdx = getInstructionIndex(MI);
     bool isStartValid = getInstructionFromIndex(LII->start);
     bool isEndValid = getInstructionFromIndex(LII->end);
 
     // FIXME: This doesn't currently handle early-clobber or multiple removed
     // defs inside of the region to repair.
-    for (MachineInstr::mop_iterator OI = MI->operands_begin(),
-         OE = MI->operands_end(); OI != OE; ++OI) {
+    for (MachineInstr::mop_iterator OI = MI.operands_begin(),
+                                    OE = MI.operands_end();
+         OI != OE; ++OI) {
       const MachineOperand &MO = *OI;
       if (!MO.isReg() || MO.getReg() != Reg)
         continue;
@@ -1523,11 +1523,12 @@ LiveIntervals::repairIntervalsInRange(MachineBasicBlock *MBB,
 
   for (MachineBasicBlock::iterator I = End; I != Begin;) {
     --I;
-    MachineInstr *MI = I;
-    if (MI->isDebugValue())
+    MachineInstr &MI = *I;
+    if (MI.isDebugValue())
       continue;
-    for (MachineInstr::const_mop_iterator MOI = MI->operands_begin(),
-         MOE = MI->operands_end(); MOI != MOE; ++MOI) {
+    for (MachineInstr::const_mop_iterator MOI = MI.operands_begin(),
+                                          MOE = MI.operands_end();
+         MOI != MOE; ++MOI) {
       if (MOI->isReg() &&
           TargetRegisterInfo::isVirtualRegister(MOI->getReg()) &&
           !hasInterval(MOI->getReg())) {

lib/CodeGen/MachineScheduler.cpp

@@ -651,7 +651,7 @@ void ScheduleDAGMI::moveInstruction(
 
   // Update LiveIntervals
   if (LIS)
-    LIS->handleMove(MI, /*UpdateFlags=*/true);
+    LIS->handleMove(*MI, /*UpdateFlags=*/true);
 
   // Recede RegionBegin if an instruction moves above the first.
   if (RegionBegin == InsertPos)

lib/CodeGen/StackSlotColoring.cpp

@@ -145,9 +145,9 @@ void StackSlotColoring::ScanForSpillSlotRefs(MachineFunction &MF) {
     MachineBasicBlock *MBB = &*MBBI;
     for (MachineBasicBlock::iterator MII = MBB->begin(), EE = MBB->end();
          MII != EE; ++MII) {
-      MachineInstr *MI = &*MII;
-      for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
-        MachineOperand &MO = MI->getOperand(i);
+      MachineInstr &MI = *MII;
+      for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
+        MachineOperand &MO = MI.getOperand(i);
         if (!MO.isFI())
           continue;
         int FI = MO.getIndex();
@@ -156,11 +156,12 @@ void StackSlotColoring::ScanForSpillSlotRefs(MachineFunction &MF) {
         if (!LS->hasInterval(FI))
           continue;
         LiveInterval &li = LS->getInterval(FI);
-        if (!MI->isDebugValue())
+        if (!MI.isDebugValue())
           li.weight += LiveIntervals::getSpillWeight(false, true, MBFI, MI);
       }
-      for (MachineInstr::mmo_iterator MMOI = MI->memoperands_begin(),
-           EE = MI->memoperands_end(); MMOI != EE; ++MMOI) {
+      for (MachineInstr::mmo_iterator MMOI = MI.memoperands_begin(),
+                                      EE = MI.memoperands_end();
+           MMOI != EE; ++MMOI) {
         MachineMemOperand *MMO = *MMOI;
         if (const FixedStackPseudoSourceValue *FSV =
             dyn_cast_or_null<FixedStackPseudoSourceValue>(

lib/CodeGen/TwoAddressInstructionPass.cpp

@@ -306,7 +306,7 @@ sink3AddrInstruction(MachineInstr *MI, unsigned SavedReg,
   MBB->insert(KillPos, MI);
 
   if (LIS)
-    LIS->handleMove(MI);
+    LIS->handleMove(*MI);
 
   ++Num3AddrSunk;
   return true;
@@ -957,7 +957,7 @@ rescheduleMIBelowKill(MachineBasicBlock::iterator &mi,
       MachineInstr *CopyMI = MBBI;
       ++MBBI;
       MBB->splice(InsertPos, MBB, CopyMI);
-      LIS->handleMove(CopyMI);
+      LIS->handleMove(*CopyMI);
       InsertPos = CopyMI;
     }
     End = std::next(MachineBasicBlock::iterator(MI));
@@ -969,7 +969,7 @@ rescheduleMIBelowKill(MachineBasicBlock::iterator &mi,
 
   // Update live variables
   if (LIS) {
-    LIS->handleMove(MI);
+    LIS->handleMove(*MI);
   } else {
     LV->removeVirtualRegisterKilled(Reg, KillMI);
     LV->addVirtualRegisterKilled(Reg, MI);
@@ -1137,7 +1137,7 @@ rescheduleKillAboveMI(MachineBasicBlock::iterator &mi,
 
   // Update live variables
   if (LIS) {
-    LIS->handleMove(KillMI);
+    LIS->handleMove(*KillMI);
   } else {
     LV->removeVirtualRegisterKilled(Reg, KillMI);
     LV->addVirtualRegisterKilled(Reg, MI);

lib/Target/AMDGPU/SIMachineScheduler.cpp

@@ -1224,7 +1224,7 @@ void SIScheduleBlockCreator::scheduleInsideBlocks() {
         // is the most cpu intensive operation of the scheduler.
         // It would gain a lot if there was a way to recompute the
         // LiveIntervals for the entire scheduling region.
-        DAG->getLIS()->handleMove(MI, /*UpdateFlags=*/true);
+        DAG->getLIS()->handleMove(*MI, /*UpdateFlags=*/true);
         PosNew.push_back(CurrentTopFastSched);
       }
     }
@@ -1250,7 +1250,7 @@ void SIScheduleBlockCreator::scheduleInsideBlocks() {
       DAG->getBB()->splice(POld, DAG->getBB(), PNew);
 
       // Update LiveIntervals.
-      DAG->getLIS()->handleMove(POld, /*UpdateFlags=*/true);
+      DAG->getLIS()->handleMove(*POld, /*UpdateFlags=*/true);
     }
   }