CodeGen: Remove more ilist iterator implicit conversions, NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249879 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/IfConversion.cpp

@@ -462,11 +462,11 @@ bool IfConverter::ReverseBranchCondition(BBInfo &BBI) {
 /// getNextBlock - Returns the next block in the function blocks ordering. If
 /// it is the end, returns NULL.
 static inline MachineBasicBlock *getNextBlock(MachineBasicBlock *BB) {
-  MachineFunction::iterator I = BB;
+  MachineFunction::iterator I = BB->getIterator();
   MachineFunction::iterator E = BB->getParent()->end();
   if (++I == E)
     return nullptr;
-  return I;
+  return &*I;
 }
 
 /// ValidSimple - Returns true if the 'true' block (along with its
@@ -530,10 +530,10 @@ bool IfConverter::ValidTriangle(BBInfo &TrueBBI, BBInfo &FalseBBI,
 
   MachineBasicBlock *TExit = FalseBranch ? TrueBBI.FalseBB : TrueBBI.TrueBB;
   if (!TExit && blockAlwaysFallThrough(TrueBBI)) {
-    MachineFunction::iterator I = TrueBBI.BB;
+    MachineFunction::iterator I = TrueBBI.BB->getIterator();
     if (++I == TrueBBI.BB->getParent()->end())
       return false;
-    TExit = I;
+    TExit = &*I;
   }
   return TExit && TExit == FalseBBI.BB;
 }
@@ -948,10 +948,8 @@ void IfConverter::AnalyzeBlock(MachineBasicBlock *MBB,
 /// candidates.
 void IfConverter::AnalyzeBlocks(MachineFunction &MF,
                                 std::vector<IfcvtToken*> &Tokens) {
-  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
-    MachineBasicBlock *BB = I;
-    AnalyzeBlock(BB, Tokens);
-  }
+  for (auto &BB : MF)
+    AnalyzeBlock(&BB, Tokens);
 
   // Sort to favor more complex ifcvt scheme.
   std::stable_sort(Tokens.begin(), Tokens.end(), IfcvtTokenCmp);
@@ -961,14 +959,14 @@ void IfConverter::AnalyzeBlocks(MachineFunction &MF,
 /// that all the intervening blocks are empty (given BB can fall through to its
 /// next block).
 static bool canFallThroughTo(MachineBasicBlock *BB, MachineBasicBlock *ToBB) {
-  MachineFunction::iterator PI = BB;
+  MachineFunction::iterator PI = BB->getIterator();
   MachineFunction::iterator I = std::next(PI);
-  MachineFunction::iterator TI = ToBB;
+  MachineFunction::iterator TI = ToBB->getIterator();
   MachineFunction::iterator E = BB->getParent()->end();
   while (I != TI) {
     // Check isSuccessor to avoid case where the next block is empty, but
     // it's not a successor.
-    if (I == E || !I->empty() || !PI->isSuccessor(I))
+    if (I == E || !I->empty() || !PI->isSuccessor(&*I))
       return false;
     PI = I++;
   }

lib/CodeGen/InterferenceCache.cpp

@@ -144,7 +144,8 @@ void InterferenceCache::Entry::update(unsigned MBBNum) {
     PrevPos = Start;
   }
 
-  MachineFunction::const_iterator MFI = MF->getBlockNumbered(MBBNum);
+  MachineFunction::const_iterator MFI =
+      MF->getBlockNumbered(MBBNum)->getIterator();
   BlockInterference *BI = &Blocks[MBBNum];
   ArrayRef<SlotIndex> RegMaskSlots;
   ArrayRef<const uint32_t*> RegMaskBits;

lib/CodeGen/IntrinsicLowering.cpp

@@ -75,7 +75,7 @@ static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
   Constant* FCache = M->getOrInsertFunction(NewFn,
                                   FunctionType::get(RetTy, ParamTys, false));
 
-  IRBuilder<> Builder(CI->getParent(), CI);
+  IRBuilder<> Builder(CI->getParent(), CI->getIterator());
   SmallVector<Value *, 8> Args(ArgBegin, ArgEnd);
   CallInst *NewCI = Builder.CreateCall(FCache, Args);
   NewCI->setName(CI->getName());
@@ -167,8 +167,8 @@ static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) {
   assert(V->getType()->isIntegerTy() && "Can't bswap a non-integer type!");
 
   unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
-  
-  IRBuilder<> Builder(IP->getParent(), IP);
+
+  IRBuilder<> Builder(IP);
 
   switch(BitSize) {
   default: llvm_unreachable("Unhandled type size of value to byteswap!");
@@ -268,7 +268,7 @@ static Value *LowerCTPOP(LLVMContext &Context, Value *V, Instruction *IP) {
     0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
   };
 
-  IRBuilder<> Builder(IP->getParent(), IP);
+  IRBuilder<> Builder(IP);
 
   unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
   unsigned WordSize = (BitSize + 63) / 64;
@@ -301,7 +301,7 @@ static Value *LowerCTPOP(LLVMContext &Context, Value *V, Instruction *IP) {
 /// instruction IP.
 static Value *LowerCTLZ(LLVMContext &Context, Value *V, Instruction *IP) {
 
-  IRBuilder<> Builder(IP->getParent(), IP);
+  IRBuilder<> Builder(IP);
 
   unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
   for (unsigned i = 1; i < BitSize; i <<= 1) {
@@ -338,7 +338,7 @@ static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname,
 }
 
 void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
-  IRBuilder<> Builder(CI->getParent(), CI);
+  IRBuilder<> Builder(CI);
   LLVMContext &Context = CI->getContext();
 
   const Function *Callee = CI->getCalledFunction();

lib/CodeGen/LiveDebugVariables.cpp

@@ -512,7 +512,7 @@ bool LDVImpl::collectDebugValues(MachineFunction &mf) {
   bool Changed = false;
   for (MachineFunction::iterator MFI = mf.begin(), MFE = mf.end(); MFI != MFE;
        ++MFI) {
-    MachineBasicBlock *MBB = MFI;
+    MachineBasicBlock *MBB = &*MFI;
     for (MachineBasicBlock::iterator MBBI = MBB->begin(), MBBE = MBB->end();
          MBBI != MBBE;) {
       if (!MBBI->isDebugValue()) {
@@ -1004,11 +1004,11 @@ void UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS,
     SlotIndex Stop = I.stop();
     unsigned LocNo = I.value();
     DEBUG(dbgs() << "\t[" << Start << ';' << Stop << "):" << LocNo);
-    MachineFunction::iterator MBB = LIS.getMBBFromIndex(Start);
-    SlotIndex MBBEnd = LIS.getMBBEndIdx(MBB);
+    MachineFunction::iterator MBB = LIS.getMBBFromIndex(Start)->getIterator();
+    SlotIndex MBBEnd = LIS.getMBBEndIdx(&*MBB);
 
     DEBUG(dbgs() << " BB#" << MBB->getNumber() << '-' << MBBEnd);
-    insertDebugValue(MBB, Start, LocNo, LIS, TII);
+    insertDebugValue(&*MBB, Start, LocNo, LIS, TII);
     // This interval may span multiple basic blocks.
     // Insert a DBG_VALUE into each one.
     while(Stop > MBBEnd) {
@@ -1016,9 +1016,9 @@ void UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS,
       Start = MBBEnd;
       if (++MBB == MFEnd)
         break;
-      MBBEnd = LIS.getMBBEndIdx(MBB);
+      MBBEnd = LIS.getMBBEndIdx(&*MBB);
       DEBUG(dbgs() << " BB#" << MBB->getNumber() << '-' << MBBEnd);
-      insertDebugValue(MBB, Start, LocNo, LIS, TII);
+      insertDebugValue(&*MBB, Start, LocNo, LIS, TII);
     }
     DEBUG(dbgs() << '\n');
     if (MBB == MFEnd)

lib/CodeGen/LiveIntervalAnalysis.cpp

@@ -224,7 +224,7 @@ void LiveIntervals::computeRegMasks() {
   // Find all instructions with regmask operands.
   for (MachineFunction::iterator MBBI = MF->begin(), E = MF->end();
        MBBI != E; ++MBBI) {
-    MachineBasicBlock *MBB = MBBI;
+    MachineBasicBlock *MBB = &*MBBI;
     std::pair<unsigned, unsigned> &RMB = RegMaskBlocks[MBB->getNumber()];
     RMB.first = RegMaskSlots.size();
     for (MachineBasicBlock::iterator MI = MBB->begin(), ME = MBB->end();
@@ -302,7 +302,7 @@ void LiveIntervals::computeLiveInRegUnits() {
   // Check all basic blocks for live-ins.
   for (MachineFunction::const_iterator MFI = MF->begin(), MFE = MF->end();
        MFI != MFE; ++MFI) {
-    const MachineBasicBlock *MBB = MFI;
+    const MachineBasicBlock *MBB = &*MFI;
 
     // We only care about ABI blocks: Entry + landing pads.
     if ((MFI != MF->begin() && !MBB->isEHPad()) || MBB->livein_empty())

lib/CodeGen/LiveVariables.cpp

@@ -637,7 +637,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) {
   // function.  This guarantees that we will see the definition of a virtual
   // register before its uses due to dominance properties of SSA (except for PHI
   // nodes, which are treated as a special case).
-  MachineBasicBlock *Entry = MF->begin();
+  MachineBasicBlock *Entry = &MF->front();
   SmallPtrSet<MachineBasicBlock*,16> Visited;
 
   for (MachineBasicBlock *MBB : depth_first_ext(Entry, Visited)) {

lib/CodeGen/LocalStackSlotAllocation.cpp

@@ -325,7 +325,7 @@ bool LocalStackSlotPass::insertFrameReferenceRegisters(MachineFunction &Fn) {
   // Sort the frame references by local offset
   array_pod_sort(FrameReferenceInsns.begin(), FrameReferenceInsns.end());
 
-  MachineBasicBlock *Entry = Fn.begin();
+  MachineBasicBlock *Entry = &Fn.front();
 
   unsigned BaseReg = 0;
   int64_t BaseOffset = 0;