Use llvm::drop_begin and llvm::drop_end (NFC)

Author: kazutakahirata

clang/lib/AST/TextNodeDumper.cpp

@@ -1901,8 +1901,7 @@ void TextNodeDumper::VisitFunctionDecl(const FunctionDecl *D) {
         auto Overrides = MD->overridden_methods();
         OS << "Overrides: [ ";
         dumpOverride(*Overrides.begin());
-        for (const auto *Override :
-             llvm::make_range(Overrides.begin() + 1, Overrides.end())) {
+        for (const auto *Override : llvm::drop_begin(Overrides)) {
           OS << ", ";
           dumpOverride(Override);
         }

llvm/lib/CodeGen/GlobalISel/Utils.cpp

@@ -1173,7 +1173,7 @@ llvm::getVectorSplat(const MachineInstr &MI, const MachineRegisterInfo &MRI) {
   if (auto Splat = getIConstantSplatSExtVal(MI, MRI))
     return RegOrConstant(*Splat);
   auto Reg = MI.getOperand(1).getReg();
-  if (any_of(make_range(MI.operands_begin() + 2, MI.operands_end()),
+  if (any_of(drop_begin(MI.operands(), 2),
              [&Reg](const MachineOperand &Op) { return Op.getReg() != Reg; }))
     return std::nullopt;
   return RegOrConstant(Reg);

llvm/lib/CodeGen/MachineCopyPropagation.cpp

@@ -1147,11 +1147,11 @@ void MachineCopyPropagation::EliminateSpillageCopies(MachineBasicBlock &MBB) {
           return;
 
         // If violate property#2, we don't fold the chain.
-        for (const MachineInstr *Spill : make_range(SC.begin() + 1, SC.end()))
+        for (const MachineInstr *Spill : drop_begin(SC))
           if (CopySourceInvalid.count(Spill))
             return;
 
-        for (const MachineInstr *Reload : make_range(RC.begin(), RC.end() - 1))
+        for (const MachineInstr *Reload : drop_end(RC))
           if (CopySourceInvalid.count(Reload))
             return;
 

llvm/lib/IR/Instructions.cpp

@@ -130,7 +130,7 @@ Value *PHINode::removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty) {
   // clients might not expect this to happen.  The code as it is thrashes the
   // use/def lists, which is kinda lame.
   std::copy(op_begin() + Idx + 1, op_end(), op_begin() + Idx);
-  copyIncomingBlocks(make_range(block_begin() + Idx + 1, block_end()), Idx);
+  copyIncomingBlocks(drop_begin(blocks(), Idx + 1), Idx);
 
   // Nuke the last value.
   Op<-1>().set(nullptr);

llvm/lib/MCA/Stages/EntryStage.cpp

@@ -67,8 +67,7 @@ llvm::Error EntryStage::cycleResume() {
 
 llvm::Error EntryStage::cycleEnd() {
   // Find the first instruction which hasn't been retired.
-  auto Range =
-      make_range(Instructions.begin() + NumRetired, Instructions.end());
+  auto Range = drop_begin(Instructions, NumRetired);
   auto It = find_if(Range, [](const std::unique_ptr<Instruction> &I) {
     return !I->isRetired();
   });

llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp

@@ -5517,11 +5517,9 @@ bool AArch64InstructionSelector::tryOptBuildVecToSubregToReg(
   const RegisterBank &DstRB = *RBI.getRegBank(Dst, MRI, TRI);
   if (EltRB != DstRB)
     return false;
-  if (any_of(make_range(I.operands_begin() + 2, I.operands_end()),
-             [&MRI](const MachineOperand &Op) {
-               return !getOpcodeDef(TargetOpcode::G_IMPLICIT_DEF, Op.getReg(),
-                                    MRI);
-             }))
+  if (any_of(drop_begin(I.operands(), 2), [&MRI](const MachineOperand &Op) {
+        return !getOpcodeDef(TargetOpcode::G_IMPLICIT_DEF, Op.getReg(), MRI);
+      }))
     return false;
   unsigned SubReg;
   const TargetRegisterClass *EltRC = getRegClassForTypeOnBank(EltTy, EltRB);