Restoring authorship annotation for <[email protected]>. Commit 2 of 2.

1 files changed, 360 insertions, 360 deletions

diff --git a/contrib/libs/llvm12/lib/CodeGen/MachineInstrBundle.cpp b/contrib/libs/llvm12/lib/CodeGen/MachineInstrBundle.cpp
index 6417cc81800..50456e489ea 100644
--- a/contrib/libs/llvm12/lib/CodeGen/MachineInstrBundle.cpp
+++ b/contrib/libs/llvm12/lib/CodeGen/MachineInstrBundle.cpp
@@ -1,360 +1,360 @@
-//===-- lib/CodeGen/MachineInstrBundle.cpp --------------------------------===// 
-// 
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 
-// See https://llvm.org/LICENSE.txt for license information. 
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 
-// 
-//===----------------------------------------------------------------------===// 
- 
-#include "llvm/CodeGen/MachineInstrBundle.h" 
-#include "llvm/ADT/SmallSet.h" 
-#include "llvm/ADT/SmallVector.h" 
-#include "llvm/CodeGen/MachineFunctionPass.h" 
-#include "llvm/CodeGen/MachineInstrBuilder.h" 
-#include "llvm/CodeGen/Passes.h" 
-#include "llvm/CodeGen/TargetInstrInfo.h" 
-#include "llvm/CodeGen/TargetRegisterInfo.h" 
-#include "llvm/CodeGen/TargetSubtargetInfo.h" 
-#include "llvm/InitializePasses.h" 
-#include "llvm/Target/TargetMachine.h" 
-#include <utility> 
-using namespace llvm; 
- 
-namespace { 
-  class UnpackMachineBundles : public MachineFunctionPass { 
-  public: 
-    static char ID; // Pass identification 
-    UnpackMachineBundles( 
-        std::function<bool(const MachineFunction &)> Ftor = nullptr) 
-        : MachineFunctionPass(ID), PredicateFtor(std::move(Ftor)) { 
-      initializeUnpackMachineBundlesPass(*PassRegistry::getPassRegistry()); 
-    } 
- 
-    bool runOnMachineFunction(MachineFunction &MF) override; 
- 
-  private: 
-    std::function<bool(const MachineFunction &)> PredicateFtor; 
-  }; 
-} // end anonymous namespace 
- 
-char UnpackMachineBundles::ID = 0; 
-char &llvm::UnpackMachineBundlesID = UnpackMachineBundles::ID; 
-INITIALIZE_PASS(UnpackMachineBundles, "unpack-mi-bundles", 
-                "Unpack machine instruction bundles", false, false) 
- 
-bool UnpackMachineBundles::runOnMachineFunction(MachineFunction &MF) { 
-  if (PredicateFtor && !PredicateFtor(MF)) 
-    return false; 
- 
-  bool Changed = false; 
-  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) { 
-    MachineBasicBlock *MBB = &*I; 
- 
-    for (MachineBasicBlock::instr_iterator MII = MBB->instr_begin(), 
-           MIE = MBB->instr_end(); MII != MIE; ) { 
-      MachineInstr *MI = &*MII; 
- 
-      // Remove BUNDLE instruction and the InsideBundle flags from bundled 
-      // instructions. 
-      if (MI->isBundle()) { 
-        while (++MII != MIE && MII->isBundledWithPred()) { 
-          MII->unbundleFromPred(); 
-          for (unsigned i = 0, e = MII->getNumOperands(); i != e; ++i) { 
-            MachineOperand &MO = MII->getOperand(i); 
-            if (MO.isReg() && MO.isInternalRead()) 
-              MO.setIsInternalRead(false); 
-          } 
-        } 
-        MI->eraseFromParent(); 
- 
-        Changed = true; 
-        continue; 
-      } 
- 
-      ++MII; 
-    } 
-  } 
- 
-  return Changed; 
-} 
- 
-FunctionPass * 
-llvm::createUnpackMachineBundles( 
-    std::function<bool(const MachineFunction &)> Ftor) { 
-  return new UnpackMachineBundles(std::move(Ftor)); 
-} 
- 
-namespace { 
-  class FinalizeMachineBundles : public MachineFunctionPass { 
-  public: 
-    static char ID; // Pass identification 
-    FinalizeMachineBundles() : MachineFunctionPass(ID) { 
-      initializeFinalizeMachineBundlesPass(*PassRegistry::getPassRegistry()); 
-    } 
- 
-    bool runOnMachineFunction(MachineFunction &MF) override; 
-  }; 
-} // end anonymous namespace 
- 
-char FinalizeMachineBundles::ID = 0; 
-char &llvm::FinalizeMachineBundlesID = FinalizeMachineBundles::ID; 
-INITIALIZE_PASS(FinalizeMachineBundles, "finalize-mi-bundles", 
-                "Finalize machine instruction bundles", false, false) 
- 
-bool FinalizeMachineBundles::runOnMachineFunction(MachineFunction &MF) { 
-  return llvm::finalizeBundles(MF); 
-} 
- 
-/// Return the first found DebugLoc that has a DILocation, given a range of 
-/// instructions. The search range is from FirstMI to LastMI (exclusive). If no 
-/// DILocation is found, then an empty location is returned. 
-static DebugLoc getDebugLoc(MachineBasicBlock::instr_iterator FirstMI, 
-                            MachineBasicBlock::instr_iterator LastMI) { 
-  for (auto MII = FirstMI; MII != LastMI; ++MII) 
-    if (MII->getDebugLoc().get()) 
-      return MII->getDebugLoc(); 
-  return DebugLoc(); 
-} 
- 
-/// finalizeBundle - Finalize a machine instruction bundle which includes 
-/// a sequence of instructions starting from FirstMI to LastMI (exclusive). 
-/// This routine adds a BUNDLE instruction to represent the bundle, it adds 
-/// IsInternalRead markers to MachineOperands which are defined inside the 
-/// bundle, and it copies externally visible defs and uses to the BUNDLE 
-/// instruction. 
-void llvm::finalizeBundle(MachineBasicBlock &MBB, 
-                          MachineBasicBlock::instr_iterator FirstMI, 
-                          MachineBasicBlock::instr_iterator LastMI) { 
-  assert(FirstMI != LastMI && "Empty bundle?"); 
-  MIBundleBuilder Bundle(MBB, FirstMI, LastMI); 
- 
-  MachineFunction &MF = *MBB.getParent(); 
-  const TargetInstrInfo *TII = MF.getSubtarget().getInstrInfo(); 
-  const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo(); 
- 
-  MachineInstrBuilder MIB = 
-      BuildMI(MF, getDebugLoc(FirstMI, LastMI), TII->get(TargetOpcode::BUNDLE)); 
-  Bundle.prepend(MIB); 
- 
-  SmallVector<Register, 32> LocalDefs; 
-  SmallSet<Register, 32> LocalDefSet; 
-  SmallSet<Register, 8> DeadDefSet; 
-  SmallSet<Register, 16> KilledDefSet; 
-  SmallVector<Register, 8> ExternUses; 
-  SmallSet<Register, 8> ExternUseSet; 
-  SmallSet<Register, 8> KilledUseSet; 
-  SmallSet<Register, 8> UndefUseSet; 
-  SmallVector<MachineOperand*, 4> Defs; 
-  for (auto MII = FirstMI; MII != LastMI; ++MII) { 
-    for (unsigned i = 0, e = MII->getNumOperands(); i != e; ++i) { 
-      MachineOperand &MO = MII->getOperand(i); 
-      if (!MO.isReg()) 
-        continue; 
-      if (MO.isDef()) { 
-        Defs.push_back(&MO); 
-        continue; 
-      } 
- 
-      Register Reg = MO.getReg(); 
-      if (!Reg) 
-        continue; 
- 
-      if (LocalDefSet.count(Reg)) { 
-        MO.setIsInternalRead(); 
-        if (MO.isKill()) 
-          // Internal def is now killed. 
-          KilledDefSet.insert(Reg); 
-      } else { 
-        if (ExternUseSet.insert(Reg).second) { 
-          ExternUses.push_back(Reg); 
-          if (MO.isUndef()) 
-            UndefUseSet.insert(Reg); 
-        } 
-        if (MO.isKill()) 
-          // External def is now killed. 
-          KilledUseSet.insert(Reg); 
-      } 
-    } 
- 
-    for (unsigned i = 0, e = Defs.size(); i != e; ++i) { 
-      MachineOperand &MO = *Defs[i]; 
-      Register Reg = MO.getReg(); 
-      if (!Reg) 
-        continue; 
- 
-      if (LocalDefSet.insert(Reg).second) { 
-        LocalDefs.push_back(Reg); 
-        if (MO.isDead()) { 
-          DeadDefSet.insert(Reg); 
-        } 
-      } else { 
-        // Re-defined inside the bundle, it's no longer killed. 
-        KilledDefSet.erase(Reg); 
-        if (!MO.isDead()) 
-          // Previously defined but dead. 
-          DeadDefSet.erase(Reg); 
-      } 
- 
-      if (!MO.isDead() && Register::isPhysicalRegister(Reg)) { 
-        for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs) { 
-          unsigned SubReg = *SubRegs; 
-          if (LocalDefSet.insert(SubReg).second) 
-            LocalDefs.push_back(SubReg); 
-        } 
-      } 
-    } 
- 
-    Defs.clear(); 
-  } 
- 
-  SmallSet<Register, 32> Added; 
-  for (unsigned i = 0, e = LocalDefs.size(); i != e; ++i) { 
-    Register Reg = LocalDefs[i]; 
-    if (Added.insert(Reg).second) { 
-      // If it's not live beyond end of the bundle, mark it dead. 
-      bool isDead = DeadDefSet.count(Reg) || KilledDefSet.count(Reg); 
-      MIB.addReg(Reg, getDefRegState(true) | getDeadRegState(isDead) | 
-                 getImplRegState(true)); 
-    } 
-  } 
- 
-  for (unsigned i = 0, e = ExternUses.size(); i != e; ++i) { 
-    Register Reg = ExternUses[i]; 
-    bool isKill = KilledUseSet.count(Reg); 
-    bool isUndef = UndefUseSet.count(Reg); 
-    MIB.addReg(Reg, getKillRegState(isKill) | getUndefRegState(isUndef) | 
-               getImplRegState(true)); 
-  } 
- 
-  // Set FrameSetup/FrameDestroy for the bundle. If any of the instructions got 
-  // the property, then also set it on the bundle. 
-  for (auto MII = FirstMI; MII != LastMI; ++MII) { 
-    if (MII->getFlag(MachineInstr::FrameSetup)) 
-      MIB.setMIFlag(MachineInstr::FrameSetup); 
-    if (MII->getFlag(MachineInstr::FrameDestroy)) 
-      MIB.setMIFlag(MachineInstr::FrameDestroy); 
-  } 
-} 
- 
-/// finalizeBundle - Same functionality as the previous finalizeBundle except 
-/// the last instruction in the bundle is not provided as an input. This is 
-/// used in cases where bundles are pre-determined by marking instructions 
-/// with 'InsideBundle' marker. It returns the MBB instruction iterator that 
-/// points to the end of the bundle. 
-MachineBasicBlock::instr_iterator 
-llvm::finalizeBundle(MachineBasicBlock &MBB, 
-                     MachineBasicBlock::instr_iterator FirstMI) { 
-  MachineBasicBlock::instr_iterator E = MBB.instr_end(); 
-  MachineBasicBlock::instr_iterator LastMI = std::next(FirstMI); 
-  while (LastMI != E && LastMI->isInsideBundle()) 
-    ++LastMI; 
-  finalizeBundle(MBB, FirstMI, LastMI); 
-  return LastMI; 
-} 
- 
-/// finalizeBundles - Finalize instruction bundles in the specified 
-/// MachineFunction. Return true if any bundles are finalized. 
-bool llvm::finalizeBundles(MachineFunction &MF) { 
-  bool Changed = false; 
-  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) { 
-    MachineBasicBlock &MBB = *I; 
-    MachineBasicBlock::instr_iterator MII = MBB.instr_begin(); 
-    MachineBasicBlock::instr_iterator MIE = MBB.instr_end(); 
-    if (MII == MIE) 
-      continue; 
-    assert(!MII->isInsideBundle() && 
-           "First instr cannot be inside bundle before finalization!"); 
- 
-    for (++MII; MII != MIE; ) { 
-      if (!MII->isInsideBundle()) 
-        ++MII; 
-      else { 
-        MII = finalizeBundle(MBB, std::prev(MII)); 
-        Changed = true; 
-      } 
-    } 
-  } 
- 
-  return Changed; 
-} 
- 
-VirtRegInfo llvm::AnalyzeVirtRegInBundle( 
-    MachineInstr &MI, Register Reg, 
-    SmallVectorImpl<std::pair<MachineInstr *, unsigned>> *Ops) { 
-  VirtRegInfo RI = {false, false, false}; 
-  for (MIBundleOperands O(MI); O.isValid(); ++O) { 
-    MachineOperand &MO = *O; 
-    if (!MO.isReg() || MO.getReg() != Reg) 
-      continue; 
- 
-    // Remember each (MI, OpNo) that refers to Reg. 
-    if (Ops) 
-      Ops->push_back(std::make_pair(MO.getParent(), O.getOperandNo())); 
- 
-    // Both defs and uses can read virtual registers. 
-    if (MO.readsReg()) { 
-      RI.Reads = true; 
-      if (MO.isDef()) 
-        RI.Tied = true; 
-    } 
- 
-    // Only defs can write. 
-    if (MO.isDef()) 
-      RI.Writes = true; 
-    else if (!RI.Tied && 
-             MO.getParent()->isRegTiedToDefOperand(O.getOperandNo())) 
-      RI.Tied = true; 
-  } 
-  return RI; 
-} 
- 
-PhysRegInfo llvm::AnalyzePhysRegInBundle(const MachineInstr &MI, Register Reg, 
-                                         const TargetRegisterInfo *TRI) { 
-  bool AllDefsDead = true; 
-  PhysRegInfo PRI = {false, false, false, false, false, false, false, false}; 
- 
-  assert(Reg.isPhysical() && "analyzePhysReg not given a physical register!"); 
-  for (ConstMIBundleOperands O(MI); O.isValid(); ++O) { 
-    const MachineOperand &MO = *O; 
- 
-    if (MO.isRegMask() && MO.clobbersPhysReg(Reg)) { 
-      PRI.Clobbered = true; 
-      continue; 
-    } 
- 
-    if (!MO.isReg()) 
-      continue; 
- 
-    Register MOReg = MO.getReg(); 
-    if (!MOReg || !Register::isPhysicalRegister(MOReg)) 
-      continue; 
- 
-    if (!TRI->regsOverlap(MOReg, Reg)) 
-      continue; 
- 
-    bool Covered = TRI->isSuperRegisterEq(Reg, MOReg); 
-    if (MO.readsReg()) { 
-      PRI.Read = true; 
-      if (Covered) { 
-        PRI.FullyRead = true; 
-        if (MO.isKill()) 
-          PRI.Killed = true; 
-      } 
-    } else if (MO.isDef()) { 
-      PRI.Defined = true; 
-      if (Covered) 
-        PRI.FullyDefined = true; 
-      if (!MO.isDead()) 
-        AllDefsDead = false; 
-    } 
-  } 
- 
-  if (AllDefsDead) { 
-    if (PRI.FullyDefined || PRI.Clobbered) 
-      PRI.DeadDef = true; 
-    else if (PRI.Defined) 
-      PRI.PartialDeadDef = true; 
-  } 
- 
-  return PRI; 
-} 
+//===-- lib/CodeGen/MachineInstrBundle.cpp --------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineInstrBundle.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/TargetInstrInfo.h"
+#include "llvm/CodeGen/TargetRegisterInfo.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/Target/TargetMachine.h"
+#include <utility>
+using namespace llvm;
+
+namespace {
+  class UnpackMachineBundles : public MachineFunctionPass {
+  public:
+    static char ID; // Pass identification
+    UnpackMachineBundles(
+        std::function<bool(const MachineFunction &)> Ftor = nullptr)
+        : MachineFunctionPass(ID), PredicateFtor(std::move(Ftor)) {
+      initializeUnpackMachineBundlesPass(*PassRegistry::getPassRegistry());
+    }
+
+    bool runOnMachineFunction(MachineFunction &MF) override;
+
+  private:
+    std::function<bool(const MachineFunction &)> PredicateFtor;
+  };
+} // end anonymous namespace
+
+char UnpackMachineBundles::ID = 0;
+char &llvm::UnpackMachineBundlesID = UnpackMachineBundles::ID;
+INITIALIZE_PASS(UnpackMachineBundles, "unpack-mi-bundles",
+                "Unpack machine instruction bundles", false, false)
+
+bool UnpackMachineBundles::runOnMachineFunction(MachineFunction &MF) {
+  if (PredicateFtor && !PredicateFtor(MF))
+    return false;
+
+  bool Changed = false;
+  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
+    MachineBasicBlock *MBB = &*I;
+
+    for (MachineBasicBlock::instr_iterator MII = MBB->instr_begin(),
+           MIE = MBB->instr_end(); MII != MIE; ) {
+      MachineInstr *MI = &*MII;
+
+      // Remove BUNDLE instruction and the InsideBundle flags from bundled
+      // instructions.
+      if (MI->isBundle()) {
+        while (++MII != MIE && MII->isBundledWithPred()) {
+          MII->unbundleFromPred();
+          for (unsigned i = 0, e = MII->getNumOperands(); i != e; ++i) {
+            MachineOperand &MO = MII->getOperand(i);
+            if (MO.isReg() && MO.isInternalRead())
+              MO.setIsInternalRead(false);
+          }
+        }
+        MI->eraseFromParent();
+
+        Changed = true;
+        continue;
+      }
+
+      ++MII;
+    }
+  }
+
+  return Changed;
+}
+
+FunctionPass *
+llvm::createUnpackMachineBundles(
+    std::function<bool(const MachineFunction &)> Ftor) {
+  return new UnpackMachineBundles(std::move(Ftor));
+}
+
+namespace {
+  class FinalizeMachineBundles : public MachineFunctionPass {
+  public:
+    static char ID; // Pass identification
+    FinalizeMachineBundles() : MachineFunctionPass(ID) {
+      initializeFinalizeMachineBundlesPass(*PassRegistry::getPassRegistry());
+    }
+
+    bool runOnMachineFunction(MachineFunction &MF) override;
+  };
+} // end anonymous namespace
+
+char FinalizeMachineBundles::ID = 0;
+char &llvm::FinalizeMachineBundlesID = FinalizeMachineBundles::ID;
+INITIALIZE_PASS(FinalizeMachineBundles, "finalize-mi-bundles",
+                "Finalize machine instruction bundles", false, false)
+
+bool FinalizeMachineBundles::runOnMachineFunction(MachineFunction &MF) {
+  return llvm::finalizeBundles(MF);
+}
+
+/// Return the first found DebugLoc that has a DILocation, given a range of
+/// instructions. The search range is from FirstMI to LastMI (exclusive). If no
+/// DILocation is found, then an empty location is returned.
+static DebugLoc getDebugLoc(MachineBasicBlock::instr_iterator FirstMI,
+                            MachineBasicBlock::instr_iterator LastMI) {
+  for (auto MII = FirstMI; MII != LastMI; ++MII)
+    if (MII->getDebugLoc().get())
+      return MII->getDebugLoc();
+  return DebugLoc();
+}
+
+/// finalizeBundle - Finalize a machine instruction bundle which includes
+/// a sequence of instructions starting from FirstMI to LastMI (exclusive).
+/// This routine adds a BUNDLE instruction to represent the bundle, it adds
+/// IsInternalRead markers to MachineOperands which are defined inside the
+/// bundle, and it copies externally visible defs and uses to the BUNDLE
+/// instruction.
+void llvm::finalizeBundle(MachineBasicBlock &MBB,
+                          MachineBasicBlock::instr_iterator FirstMI,
+                          MachineBasicBlock::instr_iterator LastMI) {
+  assert(FirstMI != LastMI && "Empty bundle?");
+  MIBundleBuilder Bundle(MBB, FirstMI, LastMI);
+
+  MachineFunction &MF = *MBB.getParent();
+  const TargetInstrInfo *TII = MF.getSubtarget().getInstrInfo();
+  const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
+
+  MachineInstrBuilder MIB =
+      BuildMI(MF, getDebugLoc(FirstMI, LastMI), TII->get(TargetOpcode::BUNDLE));
+  Bundle.prepend(MIB);
+
+  SmallVector<Register, 32> LocalDefs;
+  SmallSet<Register, 32> LocalDefSet;
+  SmallSet<Register, 8> DeadDefSet;
+  SmallSet<Register, 16> KilledDefSet;
+  SmallVector<Register, 8> ExternUses;
+  SmallSet<Register, 8> ExternUseSet;
+  SmallSet<Register, 8> KilledUseSet;
+  SmallSet<Register, 8> UndefUseSet;
+  SmallVector<MachineOperand*, 4> Defs;
+  for (auto MII = FirstMI; MII != LastMI; ++MII) {
+    for (unsigned i = 0, e = MII->getNumOperands(); i != e; ++i) {
+      MachineOperand &MO = MII->getOperand(i);
+      if (!MO.isReg())
+        continue;
+      if (MO.isDef()) {
+        Defs.push_back(&MO);
+        continue;
+      }
+
+      Register Reg = MO.getReg();
+      if (!Reg)
+        continue;
+
+      if (LocalDefSet.count(Reg)) {
+        MO.setIsInternalRead();
+        if (MO.isKill())
+          // Internal def is now killed.
+          KilledDefSet.insert(Reg);
+      } else {
+        if (ExternUseSet.insert(Reg).second) {
+          ExternUses.push_back(Reg);
+          if (MO.isUndef())
+            UndefUseSet.insert(Reg);
+        }
+        if (MO.isKill())
+          // External def is now killed.
+          KilledUseSet.insert(Reg);
+      }
+    }
+
+    for (unsigned i = 0, e = Defs.size(); i != e; ++i) {
+      MachineOperand &MO = *Defs[i];
+      Register Reg = MO.getReg();
+      if (!Reg)
+        continue;
+
+      if (LocalDefSet.insert(Reg).second) {
+        LocalDefs.push_back(Reg);
+        if (MO.isDead()) {
+          DeadDefSet.insert(Reg);
+        }
+      } else {
+        // Re-defined inside the bundle, it's no longer killed.
+        KilledDefSet.erase(Reg);
+        if (!MO.isDead())
+          // Previously defined but dead.
+          DeadDefSet.erase(Reg);
+      }
+
+      if (!MO.isDead() && Register::isPhysicalRegister(Reg)) {
+        for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs) {
+          unsigned SubReg = *SubRegs;
+          if (LocalDefSet.insert(SubReg).second)
+            LocalDefs.push_back(SubReg);
+        }
+      }
+    }
+
+    Defs.clear();
+  }
+
+  SmallSet<Register, 32> Added;
+  for (unsigned i = 0, e = LocalDefs.size(); i != e; ++i) {
+    Register Reg = LocalDefs[i];
+    if (Added.insert(Reg).second) {
+      // If it's not live beyond end of the bundle, mark it dead.
+      bool isDead = DeadDefSet.count(Reg) || KilledDefSet.count(Reg);
+      MIB.addReg(Reg, getDefRegState(true) | getDeadRegState(isDead) |
+                 getImplRegState(true));
+    }
+  }
+
+  for (unsigned i = 0, e = ExternUses.size(); i != e; ++i) {
+    Register Reg = ExternUses[i];
+    bool isKill = KilledUseSet.count(Reg);
+    bool isUndef = UndefUseSet.count(Reg);
+    MIB.addReg(Reg, getKillRegState(isKill) | getUndefRegState(isUndef) |
+               getImplRegState(true));
+  }
+
+  // Set FrameSetup/FrameDestroy for the bundle. If any of the instructions got
+  // the property, then also set it on the bundle.
+  for (auto MII = FirstMI; MII != LastMI; ++MII) {
+    if (MII->getFlag(MachineInstr::FrameSetup))
+      MIB.setMIFlag(MachineInstr::FrameSetup);
+    if (MII->getFlag(MachineInstr::FrameDestroy))
+      MIB.setMIFlag(MachineInstr::FrameDestroy);
+  }
+}
+
+/// finalizeBundle - Same functionality as the previous finalizeBundle except
+/// the last instruction in the bundle is not provided as an input. This is
+/// used in cases where bundles are pre-determined by marking instructions
+/// with 'InsideBundle' marker. It returns the MBB instruction iterator that
+/// points to the end of the bundle.
+MachineBasicBlock::instr_iterator
+llvm::finalizeBundle(MachineBasicBlock &MBB,
+                     MachineBasicBlock::instr_iterator FirstMI) {
+  MachineBasicBlock::instr_iterator E = MBB.instr_end();
+  MachineBasicBlock::instr_iterator LastMI = std::next(FirstMI);
+  while (LastMI != E && LastMI->isInsideBundle())
+    ++LastMI;
+  finalizeBundle(MBB, FirstMI, LastMI);
+  return LastMI;
+}
+
+/// finalizeBundles - Finalize instruction bundles in the specified
+/// MachineFunction. Return true if any bundles are finalized.
+bool llvm::finalizeBundles(MachineFunction &MF) {
+  bool Changed = false;
+  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
+    MachineBasicBlock &MBB = *I;
+    MachineBasicBlock::instr_iterator MII = MBB.instr_begin();
+    MachineBasicBlock::instr_iterator MIE = MBB.instr_end();
+    if (MII == MIE)
+      continue;
+    assert(!MII->isInsideBundle() &&
+           "First instr cannot be inside bundle before finalization!");
+
+    for (++MII; MII != MIE; ) {
+      if (!MII->isInsideBundle())
+        ++MII;
+      else {
+        MII = finalizeBundle(MBB, std::prev(MII));
+        Changed = true;
+      }
+    }
+  }
+
+  return Changed;
+}
+
+VirtRegInfo llvm::AnalyzeVirtRegInBundle(
+    MachineInstr &MI, Register Reg,
+    SmallVectorImpl<std::pair<MachineInstr *, unsigned>> *Ops) {
+  VirtRegInfo RI = {false, false, false};
+  for (MIBundleOperands O(MI); O.isValid(); ++O) {
+    MachineOperand &MO = *O;
+    if (!MO.isReg() || MO.getReg() != Reg)
+      continue;
+
+    // Remember each (MI, OpNo) that refers to Reg.
+    if (Ops)
+      Ops->push_back(std::make_pair(MO.getParent(), O.getOperandNo()));
+
+    // Both defs and uses can read virtual registers.
+    if (MO.readsReg()) {
+      RI.Reads = true;
+      if (MO.isDef())
+        RI.Tied = true;
+    }
+
+    // Only defs can write.
+    if (MO.isDef())
+      RI.Writes = true;
+    else if (!RI.Tied &&
+             MO.getParent()->isRegTiedToDefOperand(O.getOperandNo()))
+      RI.Tied = true;
+  }
+  return RI;
+}
+
+PhysRegInfo llvm::AnalyzePhysRegInBundle(const MachineInstr &MI, Register Reg,
+                                         const TargetRegisterInfo *TRI) {
+  bool AllDefsDead = true;
+  PhysRegInfo PRI = {false, false, false, false, false, false, false, false};
+
+  assert(Reg.isPhysical() && "analyzePhysReg not given a physical register!");
+  for (ConstMIBundleOperands O(MI); O.isValid(); ++O) {
+    const MachineOperand &MO = *O;
+
+    if (MO.isRegMask() && MO.clobbersPhysReg(Reg)) {
+      PRI.Clobbered = true;
+      continue;
+    }
+
+    if (!MO.isReg())
+      continue;
+
+    Register MOReg = MO.getReg();
+    if (!MOReg || !Register::isPhysicalRegister(MOReg))
+      continue;
+
+    if (!TRI->regsOverlap(MOReg, Reg))
+      continue;
+
+    bool Covered = TRI->isSuperRegisterEq(Reg, MOReg);
+    if (MO.readsReg()) {
+      PRI.Read = true;
+      if (Covered) {
+        PRI.FullyRead = true;
+        if (MO.isKill())
+          PRI.Killed = true;
+      }
+    } else if (MO.isDef()) {
+      PRI.Defined = true;
+      if (Covered)
+        PRI.FullyDefined = true;
+      if (!MO.isDead())
+        AllDefsDead = false;
+    }
+  }
+
+  if (AllDefsDead) {
+    if (PRI.FullyDefined || PRI.Clobbered)
+      PRI.DeadDef = true;
+    else if (PRI.Defined)
+      PRI.PartialDeadDef = true;
+  }
+
+  return PRI;
+}