[SystemZ] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC).

llvm-svn: 292983

llvm/lib/Target/SystemZ/Disassembler/SystemZDisassembler.cpp

@@ -7,12 +7,16 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
 #include "SystemZ.h"
 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
 #include "llvm/MC/MCFixedLenDisassembler.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/MathExtras.h"
 #include "llvm/Support/TargetRegistry.h"
+#include <cassert>
+#include <cstdint>
 
 using namespace llvm;
 
@@ -21,17 +25,19 @@ using namespace llvm;
 typedef MCDisassembler::DecodeStatus DecodeStatus;
 
 namespace {
+
 class SystemZDisassembler : public MCDisassembler {
 public:
   SystemZDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx)
     : MCDisassembler(STI, Ctx) {}
-  ~SystemZDisassembler() override {}
+  ~SystemZDisassembler() override = default;
 
   DecodeStatus getInstruction(MCInst &instr, uint64_t &Size,
                               ArrayRef<uint8_t> Bytes, uint64_t Address,
                               raw_ostream &VStream,
                               raw_ostream &CStream) const override;
 };
+
 } // end anonymous namespace
 
 static MCDisassembler *createSystemZDisassembler(const Target &T,

llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp

@@ -11,20 +11,28 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "MCTargetDesc/SystemZMCTargetDesc.h"
 #include "MCTargetDesc/SystemZMCFixups.h"
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/MC/MCCodeEmitter.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCFixup.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+#include <cstdint>
 
 using namespace llvm;
 
 #define DEBUG_TYPE "mccodeemitter"
 
 namespace {
+
 class SystemZMCCodeEmitter : public MCCodeEmitter {
   const MCInstrInfo &MCII;
   MCContext &Ctx;
@@ -34,7 +42,7 @@ public:
     : MCII(mcii), Ctx(ctx) {
   }
 
-  ~SystemZMCCodeEmitter() override {}
+  ~SystemZMCCodeEmitter() override = default;
 
   // OVerride MCCodeEmitter.
   void encodeInstruction(const MCInst &MI, raw_ostream &OS,
@@ -137,13 +145,8 @@ private:
   void verifyInstructionPredicates(const MCInst &MI,
                                    uint64_t AvailableFeatures) const;
 };
-} // end anonymous namespace
 
-MCCodeEmitter *llvm::createSystemZMCCodeEmitter(const MCInstrInfo &MCII,
-                                                const MCRegisterInfo &MRI,
-                                                MCContext &Ctx) {
-  return new SystemZMCCodeEmitter(MCII, Ctx);
-}
+} // end anonymous namespace
 
 void SystemZMCCodeEmitter::
 encodeInstruction(const MCInst &MI, raw_ostream &OS,
@@ -282,3 +285,9 @@ SystemZMCCodeEmitter::getPCRelEncoding(const MCInst &MI, unsigned OpNum,
 
 #define ENABLE_INSTR_PREDICATE_VERIFIER
 #include "SystemZGenMCCodeEmitter.inc"
+
+MCCodeEmitter *llvm::createSystemZMCCodeEmitter(const MCInstrInfo &MCII,
+                                                const MCRegisterInfo &MRI,
+                                                MCContext &Ctx) {
+  return new SystemZMCCodeEmitter(MCII, Ctx);
+}

llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp

@@ -7,35 +7,38 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "MCTargetDesc/SystemZMCTargetDesc.h"
 #include "MCTargetDesc/SystemZMCFixups.h"
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
 #include "llvm/MC/MCELFObjectWriter.h"
 #include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCFixup.h"
 #include "llvm/MC/MCValue.h"
+#include "llvm/Support/ELF.h"
+#include "llvm/Support/ErrorHandling.h"
+#include <cassert>
+#include <cstdint>
 
 using namespace llvm;
 
 namespace {
+
 class SystemZObjectWriter : public MCELFObjectTargetWriter {
 public:
   SystemZObjectWriter(uint8_t OSABI);
-
-  ~SystemZObjectWriter() override;
+  ~SystemZObjectWriter() override = default;
 
 protected:
   // Override MCELFObjectTargetWriter.
   unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
                         const MCFixup &Fixup, bool IsPCRel) const override;
 };
+
 } // end anonymous namespace
 
 SystemZObjectWriter::SystemZObjectWriter(uint8_t OSABI)
   : MCELFObjectTargetWriter(/*Is64Bit=*/true, OSABI, ELF::EM_S390,
                             /*HasRelocationAddend=*/ true) {}
 
-SystemZObjectWriter::~SystemZObjectWriter() {
-}
-
 // Return the relocation type for an absolute value of MCFixupKind Kind.
 static unsigned getAbsoluteReloc(unsigned Kind) {
   switch (Kind) {

llvm/lib/Target/SystemZ/SystemZElimCompare.cpp

@@ -13,15 +13,23 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "SystemZ.h"
+#include "SystemZInstrInfo.h"
 #include "SystemZTargetMachine.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/IR/Function.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
+#include "llvm/CodeGen/MachineOperand.h"
+#include "llvm/MC/MCInstrDesc.h"
 #include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
+#include <cassert>
+#include <cstdint>
 
 using namespace llvm;
 
@@ -33,11 +41,11 @@ STATISTIC(EliminatedComparisons, "Number of eliminated comparisons");
 STATISTIC(FusedComparisons, "Number of fused compare-and-branch instructions");
 
 namespace {
+
 // Represents the references to a particular register in one or more
 // instructions.
 struct Reference {
-  Reference()
-    : Def(false), Use(false) {}
+  Reference() = default;
 
   Reference &operator|=(const Reference &Other) {
     Def |= Other.Def;
@@ -49,15 +57,16 @@ struct Reference {
 
   // True if the register is defined or used in some form, either directly or
   // via a sub- or super-register.
-  bool Def;
-  bool Use;
+  bool Def = false;
+  bool Use = false;
 };
 
 class SystemZElimCompare : public MachineFunctionPass {
 public:
   static char ID;
+
   SystemZElimCompare(const SystemZTargetMachine &tm)
-    : MachineFunctionPass(ID), TII(nullptr), TRI(nullptr) {}
+    : MachineFunctionPass(ID) {}
 
   StringRef getPassName() const override {
     return "SystemZ Comparison Elimination";
@@ -65,6 +74,7 @@ public:
 
   bool processBlock(MachineBasicBlock &MBB);
   bool runOnMachineFunction(MachineFunction &F) override;
+
   MachineFunctionProperties getRequiredProperties() const override {
     return MachineFunctionProperties().set(
         MachineFunctionProperties::Property::NoVRegs);
@@ -84,16 +94,13 @@ private:
   bool fuseCompareOperations(MachineInstr &Compare,
                              SmallVectorImpl<MachineInstr *> &CCUsers);
 
-  const SystemZInstrInfo *TII;
-  const TargetRegisterInfo *TRI;
+  const SystemZInstrInfo *TII = nullptr;
+  const TargetRegisterInfo *TRI = nullptr;
 };
 
 char SystemZElimCompare::ID = 0;
-} // end anonymous namespace
 
-FunctionPass *llvm::createSystemZElimComparePass(SystemZTargetMachine &TM) {
-  return new SystemZElimCompare(TM);
-}
+} // end anonymous namespace
 
 // Return true if CC is live out of MBB.
 static bool isCCLiveOut(MachineBasicBlock &MBB) {
@@ -366,10 +373,8 @@ static bool isCompareZero(MachineInstr &Compare) {
     return true;
 
   default:
-
     if (isLoadAndTestAsCmp(Compare))
       return true;
-
     return Compare.getNumExplicitOperands() == 2 &&
            Compare.getOperand(1).isImm() && Compare.getOperand(1).getImm() == 0;
   }
@@ -571,3 +576,7 @@ bool SystemZElimCompare::runOnMachineFunction(MachineFunction &F) {
 
   return Changed;
 }
+
+FunctionPass *llvm::createSystemZElimComparePass(SystemZTargetMachine &TM) {
+  return new SystemZElimCompare(TM);
+}

llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp

@@ -11,12 +11,34 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "SystemZInstrInfo.h"
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
+#include "SystemZ.h"
 #include "SystemZInstrBuilder.h"
-#include "SystemZTargetMachine.h"
-#include "llvm/CodeGen/LiveVariables.h"
+#include "SystemZInstrInfo.h"
+#include "SystemZSubtarget.h"
+#include "llvm/CodeGen/LiveInterval.h"
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"
+#include "llvm/CodeGen/LiveVariables.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
+#include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/SlotIndexes.h"
+#include "llvm/MC/MCInstrDesc.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/Support/BranchProbability.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
+#include <cassert>
+#include <cstdint>
+#include <iterator>
 
 using namespace llvm;
 
@@ -255,7 +277,6 @@ void SystemZInstrInfo::emitGRX32Move(MachineBasicBlock &MBB,
     .addImm(32 - Size).addImm(128 + 31).addImm(Rotate);
 }
 
-
 MachineInstr *SystemZInstrInfo::commuteInstructionImpl(MachineInstr &MI,
                                                        bool NewMI,
                                                        unsigned OpIdx1,
@@ -284,7 +305,6 @@ MachineInstr *SystemZInstrInfo::commuteInstructionImpl(MachineInstr &MI,
   }
 }
 
-
 // If MI is a simple load or store for a frame object, return the register
 // it loads or stores and set FrameIndex to the index of the frame object.
 // Return 0 otherwise.
@@ -588,7 +608,6 @@ bool SystemZInstrInfo::optimizeCompareInstr(
          removeIPMBasedCompare(Compare, SrcReg, MRI, &RI);
 }
 
-
 bool SystemZInstrInfo::canInsertSelect(const MachineBasicBlock &MBB,
                                        ArrayRef<MachineOperand> Pred,
                                        unsigned TrueReg, unsigned FalseReg,
@@ -892,15 +911,19 @@ static bool isSimpleBD12Move(const MachineInstr *MI, unsigned Flag) {
 }
 
 namespace {
+
 struct LogicOp {
-  LogicOp() : RegSize(0), ImmLSB(0), ImmSize(0) {}
+  LogicOp() = default;
   LogicOp(unsigned regSize, unsigned immLSB, unsigned immSize)
     : RegSize(regSize), ImmLSB(immLSB), ImmSize(immSize) {}
 
   explicit operator bool() const { return RegSize; }
 
-  unsigned RegSize, ImmLSB, ImmSize;
+  unsigned RegSize = 0;
+  unsigned ImmLSB = 0;
+  unsigned ImmSize = 0;
 };
+
 } // end anonymous namespace
 
 static LogicOp interpretAndImmediate(unsigned Opcode) {

llvm/lib/Target/SystemZ/SystemZInstrInfo.h

@@ -16,16 +16,21 @@
 
 #include "SystemZ.h"
 #include "SystemZRegisterInfo.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/Target/TargetInstrInfo.h"
+#include <cstdint>
 
 #define GET_INSTRINFO_HEADER
 #include "SystemZGenInstrInfo.inc"
 
 namespace llvm {
 
-class SystemZTargetMachine;
+class SystemZSubtarget;
 
 namespace SystemZII {
+
 enum {
   // See comments in SystemZInstrFormats.td.
   SimpleBDXLoad          = (1 << 0),
@@ -43,12 +48,15 @@ enum {
   CCMaskLast             = (1 << 19),
   IsLogical              = (1 << 20)
 };
+
 static inline unsigned getAccessSize(unsigned int Flags) {
   return (Flags & AccessSizeMask) >> AccessSizeShift;
 }
+
 static inline unsigned getCCValues(unsigned int Flags) {
   return (Flags & CCValuesMask) >> CCValuesShift;
 }
+
 static inline unsigned getCompareZeroCCMask(unsigned int Flags) {
   return (Flags & CompareZeroCCMaskMask) >> CompareZeroCCMaskShift;
 }
@@ -64,6 +72,7 @@ enum {
   // @INDNTPOFF
   MO_INDNTPOFF = (2 << 0)
 };
+
 // Classifies a branch.
 enum BranchType {
   // An instruction that branches on the current value of CC.
@@ -93,6 +102,7 @@ enum BranchType {
   // the result is nonzero.
   BranchCTG
 };
+
 // Information about a branch instruction.
 struct Branch {
   // The type of the branch.
@@ -111,6 +121,7 @@ struct Branch {
          const MachineOperand *target)
     : Type(type), CCValid(ccValid), CCMask(ccMask), Target(target) {}
 };
+
 // Kinds of fused compares in compare-and-* instructions.  Together with type
 // of the converted compare, this identifies the compare-and-*
 // instruction.
@@ -127,9 +138,9 @@ enum FusedCompareType {
   // Trap
   CompareAndTrap
 };
+
 } // end namespace SystemZII
 
-class SystemZSubtarget;
 class SystemZInstrInfo : public SystemZGenInstrInfo {
   const SystemZRegisterInfo RI;
   SystemZSubtarget &STI;
@@ -305,6 +316,7 @@ public:
   areMemAccessesTriviallyDisjoint(MachineInstr &MIa, MachineInstr &MIb,
                                   AliasAnalysis *AA = nullptr) const override;
 };
+
 } // end namespace llvm
 
-#endif
+#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZINSTRINFO_H

llvm/lib/Target/SystemZ/SystemZLongBranch.cpp

@@ -53,15 +53,21 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "SystemZ.h"
+#include "SystemZInstrInfo.h"
 #include "SystemZTargetMachine.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/IR/Function.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/IR/DebugLoc.h"
+#include "llvm/Support/ErrorHandling.h"
+#include <cassert>
+#include <cstdint>
 
 using namespace llvm;
 
@@ -70,72 +76,72 @@ using namespace llvm;
 STATISTIC(LongBranches, "Number of long branches.");
 
 namespace {
+
 // Represents positional information about a basic block.
 struct MBBInfo {
   // The address that we currently assume the block has.
-  uint64_t Address;
+  uint64_t Address = 0;
 
   // The size of the block in bytes, excluding terminators.
   // This value never changes.
-  uint64_t Size;
+  uint64_t Size = 0;
 
   // The minimum alignment of the block, as a log2 value.
   // This value never changes.
-  unsigned Alignment;
+  unsigned Alignment = 0;
 
   // The number of terminators in this block.  This value never changes.
-  unsigned NumTerminators;
+  unsigned NumTerminators = 0;
 
-  MBBInfo()
-    : Address(0), Size(0), Alignment(0), NumTerminators(0) {} 
+  MBBInfo() = default;
 };
 
 // Represents the state of a block terminator.
 struct TerminatorInfo {
   // If this terminator is a relaxable branch, this points to the branch
   // instruction, otherwise it is null.
-  MachineInstr *Branch;
+  MachineInstr *Branch = nullptr;
 
   // The address that we currently assume the terminator has.
-  uint64_t Address;
+  uint64_t Address = 0;
 
   // The current size of the terminator in bytes.
-  uint64_t Size;
+  uint64_t Size = 0;
 
   // If Branch is nonnull, this is the number of the target block,
   // otherwise it is unused.
-  unsigned TargetBlock;
+  unsigned TargetBlock = 0;
 
   // If Branch is nonnull, this is the length of the longest relaxed form,
   // otherwise it is zero.
-  unsigned ExtraRelaxSize;
+  unsigned ExtraRelaxSize = 0;
 
-  TerminatorInfo() : Branch(nullptr), Size(0), TargetBlock(0),
-                     ExtraRelaxSize(0) {}
+  TerminatorInfo() = default;
 };
 
 // Used to keep track of the current position while iterating over the blocks.
 struct BlockPosition {
   // The address that we assume this position has.
-  uint64_t Address;
+  uint64_t Address = 0;
 
   // The number of low bits in Address that are known to be the same
   // as the runtime address.
   unsigned KnownBits;
 
-  BlockPosition(unsigned InitialAlignment)
-    : Address(0), KnownBits(InitialAlignment) {}
+  BlockPosition(unsigned InitialAlignment) : KnownBits(InitialAlignment) {}
 };
 
 class SystemZLongBranch : public MachineFunctionPass {
 public:
   static char ID;
+
   SystemZLongBranch(const SystemZTargetMachine &tm)
-    : MachineFunctionPass(ID), TII(nullptr) {}
+    : MachineFunctionPass(ID) {}
 
   StringRef getPassName() const override { return "SystemZ Long Branch"; }
 
   bool runOnMachineFunction(MachineFunction &F) override;
+
   MachineFunctionProperties getRequiredProperties() const override {
     return MachineFunctionProperties().set(
         MachineFunctionProperties::Property::NoVRegs);
@@ -155,7 +161,7 @@ private:
   void relaxBranch(TerminatorInfo &Terminator);
   void relaxBranches();
 
-  const SystemZInstrInfo *TII;
+  const SystemZInstrInfo *TII = nullptr;
   MachineFunction *MF;
   SmallVector<MBBInfo, 16> MBBs;
   SmallVector<TerminatorInfo, 16> Terminators;
@@ -165,11 +171,8 @@ char SystemZLongBranch::ID = 0;
 
 const uint64_t MaxBackwardRange = 0x10000;
 const uint64_t MaxForwardRange = 0xfffe;
-} // end anonymous namespace
 
-FunctionPass *llvm::createSystemZLongBranchPass(SystemZTargetMachine &TM) {
-  return new SystemZLongBranch(TM);
-}
+} // end anonymous namespace
 
 // Position describes the state immediately before Block.  Update Block
 // accordingly and move Position to the end of the block's non-terminator
@@ -463,3 +466,7 @@ bool SystemZLongBranch::runOnMachineFunction(MachineFunction &F) {
   relaxBranches();
   return true;
 }
+
+FunctionPass *llvm::createSystemZLongBranchPass(SystemZTargetMachine &TM) {
+  return new SystemZLongBranch(TM);
+}

llvm/lib/Target/SystemZ/SystemZMachineScheduler.h

@@ -1,4 +1,4 @@
-//==-- SystemZMachineScheduler.h - SystemZ Scheduler Interface -*- C++ -*---==//
+//==- SystemZMachineScheduler.h - SystemZ Scheduler Interface ----*- C++ -*-==//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -14,10 +14,10 @@
 // usage of processor resources.
 //===----------------------------------------------------------------------===//
 
-#include "SystemZInstrInfo.h"
 #include "SystemZHazardRecognizer.h"
 #include "llvm/CodeGen/MachineScheduler.h"
-#include "llvm/Support/Debug.h"
+#include "llvm/CodeGen/ScheduleDAG.h"
+#include <set>
 
 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H
 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H
@@ -32,22 +32,22 @@ class SystemZPostRASchedStrategy : public MachineSchedStrategy {
   
   /// A candidate during instruction evaluation.
   struct Candidate {
-    SUnit *SU;
+    SUnit *SU = nullptr;
 
     /// The decoding cost.
-    int GroupingCost;
+    int GroupingCost = 0;
 
     /// The processor resources cost.
-    int ResourcesCost;
+    int ResourcesCost = 0;
 
-    Candidate() : SU(nullptr), GroupingCost(0), ResourcesCost(0) {}
+    Candidate() = default;
     Candidate(SUnit *SU_, SystemZHazardRecognizer &HazardRec);
 
     // Compare two candidates.
     bool operator<(const Candidate &other);
 
     // Check if this node is free of cost ("as good as any").
-    bool inline noCost() {
+    bool noCost() const {
       return (GroupingCost <= 0 && !ResourcesCost);
     }
   };
@@ -107,6 +107,6 @@ class SystemZPostRASchedStrategy : public MachineSchedStrategy {
   void releaseBottomNode(SUnit *SU) override {};
 };
 
-} // namespace llvm
+} // end namespace llvm
 
-#endif /* LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H */
+#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H

llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp

@@ -7,14 +7,25 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
+#include "SystemZ.h"
+#include "SystemZMachineScheduler.h"
 #include "SystemZTargetMachine.h"
 #include "SystemZTargetTransformInfo.h"
-#include "SystemZMachineScheduler.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/TargetPassConfig.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Transforms/Scalar.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/Support/CodeGen.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Transforms/Scalar.h"
+#include <string>
 
 using namespace llvm;
 
@@ -48,7 +59,7 @@ static bool UsesVectorABI(StringRef CPU, StringRef FS) {
 static std::string computeDataLayout(const Triple &TT, StringRef CPU,
                                      StringRef FS) {
   bool VectorABI = UsesVectorABI(CPU, FS);
-  std::string Ret = "";
+  std::string Ret;
 
   // Big endian.
   Ret += "E";
@@ -96,14 +107,15 @@ SystemZTargetMachine::SystemZTargetMachine(const Target &T, const Triple &TT,
                                            CodeGenOpt::Level OL)
     : LLVMTargetMachine(T, computeDataLayout(TT, CPU, FS), TT, CPU, FS, Options,
                         getEffectiveRelocModel(RM), CM, OL),
-      TLOF(make_unique<TargetLoweringObjectFileELF>()),
+      TLOF(llvm::make_unique<TargetLoweringObjectFileELF>()),
       Subtarget(TT, CPU, FS, *this) {
   initAsmInfo();
 }
 
-SystemZTargetMachine::~SystemZTargetMachine() {}
+SystemZTargetMachine::~SystemZTargetMachine() = default;
 
 namespace {
+
 /// SystemZ Code Generator Pass Configuration Options.
 class SystemZPassConfig : public TargetPassConfig {
 public:
@@ -116,7 +128,8 @@ public:
 
   ScheduleDAGInstrs *
   createPostMachineScheduler(MachineSchedContext *C) const override {
-    return new ScheduleDAGMI(C, make_unique<SystemZPostRASchedStrategy>(C),
+    return new ScheduleDAGMI(C,
+                             llvm::make_unique<SystemZPostRASchedStrategy>(C),
                              /*RemoveKillFlags=*/true);
   }
 
@@ -126,6 +139,7 @@ public:
   void addPreSched2() override;
   void addPreEmitPass() override;
 };
+
 } // end anonymous namespace
 
 void SystemZPassConfig::addIRPasses() {
@@ -157,7 +171,6 @@ void SystemZPassConfig::addPreSched2() {
 }
 
 void SystemZPassConfig::addPreEmitPass() {
-
   // Do instruction shortening before compare elimination because some
   // vector instructions will be shortened into opcodes that compare
   // elimination recognizes.

llvm/lib/Target/SystemZ/SystemZTargetMachine.h

@@ -1,4 +1,4 @@
-//==- SystemZTargetMachine.h - Define TargetMachine for SystemZ ---*- C++ -*-=//
+//=- SystemZTargetMachine.h - Define TargetMachine for SystemZ ----*- C++ -*-=//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -16,12 +16,15 @@
 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETMACHINE_H
 
 #include "SystemZSubtarget.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/Support/CodeGen.h"
 #include "llvm/Target/TargetMachine.h"
+#include <memory>
 
 namespace llvm {
 
-class TargetFrameLowering;
-
 class SystemZTargetMachine : public LLVMTargetMachine {
   std::unique_ptr<TargetLoweringObjectFile> TLOF;
   SystemZSubtarget Subtarget;
@@ -34,20 +37,22 @@ public:
   ~SystemZTargetMachine() override;
 
   const SystemZSubtarget *getSubtargetImpl() const { return &Subtarget; }
+
   const SystemZSubtarget *getSubtargetImpl(const Function &) const override {
     return &Subtarget;
   }
+
   // Override LLVMTargetMachine
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
   TargetIRAnalysis getTargetIRAnalysis() override;
+
   TargetLoweringObjectFile *getObjFileLowering() const override {
     return TLOF.get();
   }
 
   bool targetSchedulesPostRAScheduling() const override { return true; };
-
 };
 
 } // end namespace llvm
 
-#endif
+#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETMACHINE_H