Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 321 deletions

diff --git a/gnu/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp b/gnu/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp
deleted file mode 100644
index e0a5f7f04fa..00000000000
--- a/gnu/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp
+++ /dev/null
@@ -1,321 +0,0 @@
-//===-- Thumb2ITBlockPass.cpp - Insert Thumb-2 IT blocks ------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "ARM.h"
-#include "ARMMachineFunctionInfo.h"
-#include "ARMSubtarget.h"
-#include "MCTargetDesc/ARMBaseInfo.h"
-#include "Thumb2InstrInfo.h"
-#include "llvm/ADT/SmallSet.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/CodeGen/MachineInstrBundle.h"
-#include "llvm/CodeGen/MachineOperand.h"
-#include "llvm/IR/DebugLoc.h"
-#include "llvm/MC/MCInstrDesc.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include <cassert>
-#include <new>
-
-using namespace llvm;
-
-#define DEBUG_TYPE "thumb2-it"
-
-STATISTIC(NumITs,        "Number of IT blocks inserted");
-STATISTIC(NumMovedInsts, "Number of predicated instructions moved");
-
-namespace {
-
-  class Thumb2ITBlockPass : public MachineFunctionPass {
-  public:
-    static char ID;
-
-    bool restrictIT;
-    const Thumb2InstrInfo *TII;
-    const TargetRegisterInfo *TRI;
-    ARMFunctionInfo *AFI;
-
-    Thumb2ITBlockPass() : MachineFunctionPass(ID) {}
-
-    bool runOnMachineFunction(MachineFunction &Fn) override;
-
-    MachineFunctionProperties getRequiredProperties() const override {
-      return MachineFunctionProperties().set(
-          MachineFunctionProperties::Property::NoVRegs);
-    }
-
-    StringRef getPassName() const override {
-      return "Thumb IT blocks insertion pass";
-    }
-
-  private:
-    bool MoveCopyOutOfITBlock(MachineInstr *MI,
-                              ARMCC::CondCodes CC, ARMCC::CondCodes OCC,
-                              SmallSet<unsigned, 4> &Defs,
-                              SmallSet<unsigned, 4> &Uses);
-    bool InsertITInstructions(MachineBasicBlock &MBB);
-  };
-
-  char Thumb2ITBlockPass::ID = 0;
-
-} // end anonymous namespace
-
-/// TrackDefUses - Tracking what registers are being defined and used by
-/// instructions in the IT block. This also tracks "dependencies", i.e. uses
-/// in the IT block that are defined before the IT instruction.
-static void TrackDefUses(MachineInstr *MI,
-                         SmallSet<unsigned, 4> &Defs,
-                         SmallSet<unsigned, 4> &Uses,
-                         const TargetRegisterInfo *TRI) {
-  SmallVector<unsigned, 4> LocalDefs;
-  SmallVector<unsigned, 4> LocalUses;
-
-  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
-    MachineOperand &MO = MI->getOperand(i);
-    if (!MO.isReg())
-      continue;
-    unsigned Reg = MO.getReg();
-    if (!Reg || Reg == ARM::ITSTATE || Reg == ARM::SP)
-      continue;
-    if (MO.isUse())
-      LocalUses.push_back(Reg);
-    else
-      LocalDefs.push_back(Reg);
-  }
-
-  for (unsigned i = 0, e = LocalUses.size(); i != e; ++i) {
-    unsigned Reg = LocalUses[i];
-    for (MCSubRegIterator Subreg(Reg, TRI, /*IncludeSelf=*/true);
-         Subreg.isValid(); ++Subreg)
-      Uses.insert(*Subreg);
-  }
-
-  for (unsigned i = 0, e = LocalDefs.size(); i != e; ++i) {
-    unsigned Reg = LocalDefs[i];
-    for (MCSubRegIterator Subreg(Reg, TRI, /*IncludeSelf=*/true);
-         Subreg.isValid(); ++Subreg)
-      Defs.insert(*Subreg);
-    if (Reg == ARM::CPSR)
-      continue;
-  }
-}
-
-/// Clear kill flags for any uses in the given set.  This will likely
-/// conservatively remove more kill flags than are necessary, but removing them
-/// is safer than incorrect kill flags remaining on instructions.
-static void ClearKillFlags(MachineInstr *MI, SmallSet<unsigned, 4> &Uses) {
-  for (MachineOperand &MO : MI->operands()) {
-    if (!MO.isReg() || MO.isDef() || !MO.isKill())
-      continue;
-    if (!Uses.count(MO.getReg()))
-      continue;
-    MO.setIsKill(false);
-  }
-}
-
-static bool isCopy(MachineInstr *MI) {
-  switch (MI->getOpcode()) {
-  default:
-    return false;
-  case ARM::MOVr:
-  case ARM::MOVr_TC:
-  case ARM::tMOVr:
-  case ARM::t2MOVr:
-    return true;
-  }
-}
-
-bool
-Thumb2ITBlockPass::MoveCopyOutOfITBlock(MachineInstr *MI,
-                                      ARMCC::CondCodes CC, ARMCC::CondCodes OCC,
-                                        SmallSet<unsigned, 4> &Defs,
-                                        SmallSet<unsigned, 4> &Uses) {
-  if (!isCopy(MI))
-    return false;
-  // llvm models select's as two-address instructions. That means a copy
-  // is inserted before a t2MOVccr, etc. If the copy is scheduled in
-  // between selects we would end up creating multiple IT blocks.
-  assert(MI->getOperand(0).getSubReg() == 0 &&
-         MI->getOperand(1).getSubReg() == 0 &&
-         "Sub-register indices still around?");
-
-  unsigned DstReg = MI->getOperand(0).getReg();
-  unsigned SrcReg = MI->getOperand(1).getReg();
-
-  // First check if it's safe to move it.
-  if (Uses.count(DstReg) || Defs.count(SrcReg))
-    return false;
-
-  // If the CPSR is defined by this copy, then we don't want to move it. E.g.,
-  // if we have:
-  //
-  //   movs  r1, r1
-  //   rsb   r1, 0
-  //   movs  r2, r2
-  //   rsb   r2, 0
-  //
-  // we don't want this to be converted to:
-  //
-  //   movs  r1, r1
-  //   movs  r2, r2
-  //   itt   mi
-  //   rsb   r1, 0
-  //   rsb   r2, 0
-  //
-  const MCInstrDesc &MCID = MI->getDesc();
-  if (MI->hasOptionalDef() &&
-      MI->getOperand(MCID.getNumOperands() - 1).getReg() == ARM::CPSR)
-    return false;
-
-  // Then peek at the next instruction to see if it's predicated on CC or OCC.
-  // If not, then there is nothing to be gained by moving the copy.
-  MachineBasicBlock::iterator I = MI; ++I;
-  MachineBasicBlock::iterator E = MI->getParent()->end();
-  while (I != E && I->isDebugInstr())
-    ++I;
-  if (I != E) {
-    unsigned NPredReg = 0;
-    ARMCC::CondCodes NCC = getITInstrPredicate(*I, NPredReg);
-    if (NCC == CC || NCC == OCC)
-      return true;
-  }
-  return false;
-}
-
-bool Thumb2ITBlockPass::InsertITInstructions(MachineBasicBlock &MBB) {
-  bool Modified = false;
-
-  SmallSet<unsigned, 4> Defs;
-  SmallSet<unsigned, 4> Uses;
-  MachineBasicBlock::iterator MBBI = MBB.begin(), E = MBB.end();
-  while (MBBI != E) {
-    MachineInstr *MI = &*MBBI;
-    DebugLoc dl = MI->getDebugLoc();
-    unsigned PredReg = 0;
-    ARMCC::CondCodes CC = getITInstrPredicate(*MI, PredReg);
-    if (CC == ARMCC::AL) {
-      ++MBBI;
-      continue;
-    }
-
-    Defs.clear();
-    Uses.clear();
-    TrackDefUses(MI, Defs, Uses, TRI);
-
-    // Insert an IT instruction.
-    MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII->get(ARM::t2IT))
-      .addImm(CC);
-
-    // Add implicit use of ITSTATE to IT block instructions.
-    MI->addOperand(MachineOperand::CreateReg(ARM::ITSTATE, false/*ifDef*/,
-                                             true/*isImp*/, false/*isKill*/));
-
-    MachineInstr *LastITMI = MI;
-    MachineBasicBlock::iterator InsertPos = MIB.getInstr();
-    ++MBBI;
-
-    // Form IT block.
-    ARMCC::CondCodes OCC = ARMCC::getOppositeCondition(CC);
-    unsigned Mask = 0, Pos = 3;
-
-    // v8 IT blocks are limited to one conditional op unless -arm-no-restrict-it
-    // is set: skip the loop
-    if (!restrictIT) {
-      // Branches, including tricky ones like LDM_RET, need to end an IT
-      // block so check the instruction we just put in the block.
-      for (; MBBI != E && Pos &&
-             (!MI->isBranch() && !MI->isReturn()) ; ++MBBI) {
-        if (MBBI->isDebugInstr())
-          continue;
-
-        MachineInstr *NMI = &*MBBI;
-        MI = NMI;
-
-        unsigned NPredReg = 0;
-        ARMCC::CondCodes NCC = getITInstrPredicate(*NMI, NPredReg);
-        if (NCC == CC || NCC == OCC) {
-          Mask |= (NCC & 1) << Pos;
-          // Add implicit use of ITSTATE.
-          NMI->addOperand(MachineOperand::CreateReg(ARM::ITSTATE, false/*ifDef*/,
-                                                 true/*isImp*/, false/*isKill*/));
-          LastITMI = NMI;
-        } else {
-          if (NCC == ARMCC::AL &&
-              MoveCopyOutOfITBlock(NMI, CC, OCC, Defs, Uses)) {
-            --MBBI;
-            MBB.remove(NMI);
-            MBB.insert(InsertPos, NMI);
-            ClearKillFlags(MI, Uses);
-            ++NumMovedInsts;
-            continue;
-          }
-          break;
-        }
-        TrackDefUses(NMI, Defs, Uses, TRI);
-        --Pos;
-      }
-    }
-
-    // Finalize IT mask.
-    Mask |= (1 << Pos);
-    // Tag along (firstcond[0] << 4) with the mask.
-    Mask |= (CC & 1) << 4;
-    MIB.addImm(Mask);
-
-    // Last instruction in IT block kills ITSTATE.
-    LastITMI->findRegisterUseOperand(ARM::ITSTATE)->setIsKill();
-
-    // Finalize the bundle.
-    finalizeBundle(MBB, InsertPos.getInstrIterator(),
-                   ++LastITMI->getIterator());
-
-    Modified = true;
-    ++NumITs;
-  }
-
-  return Modified;
-}
-
-bool Thumb2ITBlockPass::runOnMachineFunction(MachineFunction &Fn) {
-  const ARMSubtarget &STI =
-      static_cast<const ARMSubtarget &>(Fn.getSubtarget());
-  if (!STI.isThumb2())
-    return false;
-  AFI = Fn.getInfo<ARMFunctionInfo>();
-  TII = static_cast<const Thumb2InstrInfo *>(STI.getInstrInfo());
-  TRI = STI.getRegisterInfo();
-  restrictIT = STI.restrictIT();
-
-  if (!AFI->isThumbFunction())
-    return false;
-
-  bool Modified = false;
-  for (MachineFunction::iterator MFI = Fn.begin(), E = Fn.end(); MFI != E; ) {
-    MachineBasicBlock &MBB = *MFI;
-    ++MFI;
-    Modified |= InsertITInstructions(MBB);
-  }
-
-  if (Modified)
-    AFI->setHasITBlocks(true);
-
-  return Modified;
-}
-
-/// createThumb2ITBlockPass - Returns an instance of the Thumb2 IT blocks
-/// insertion pass.
-FunctionPass *llvm::createThumb2ITBlockPass() {
-  return new Thumb2ITBlockPass();
-}