1 files changed, 0 insertions, 104 deletions
diff --git a/lib/Target/ARM64/ARM64DeadRegisterDefinitionsPass.cpp b/lib/Target/ARM64/ARM64DeadRegisterDefinitionsPass.cpp
deleted file mode 100644
index 3e410e5..0000000
--- a/lib/Target/ARM64/ARM64DeadRegisterDefinitionsPass.cpp
+++ /dev/null
@@ -1,104 +0,0 @@
-//===-- ARM64DeadRegisterDefinitions.cpp - Replace dead defs w/ zero reg --===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-// When allowed by the instruction, replace a dead definition of a GPR with
-// the zero register. This makes the code a bit friendlier towards the
-// hardware's register renamer.
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "arm64-dead-defs"
-#include "ARM64.h"
-#include "ARM64RegisterInfo.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
-using namespace llvm;
-
-STATISTIC(NumDeadDefsReplaced, "Number of dead definitions replaced");
-
-namespace {
-class ARM64DeadRegisterDefinitions : public MachineFunctionPass {
-private:
-  bool processMachineBasicBlock(MachineBasicBlock *MBB);
-
-public:
-  static char ID; // Pass identification, replacement for typeid.
-  explicit ARM64DeadRegisterDefinitions() : MachineFunctionPass(ID) {}
-
-  virtual bool runOnMachineFunction(MachineFunction &F);
-
-  const char *getPassName() const { return "Dead register definitions"; }
-
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.setPreservesCFG();
-    MachineFunctionPass::getAnalysisUsage(AU);
-  }
-};
-char ARM64DeadRegisterDefinitions::ID = 0;
-} // end anonymous namespace
-
-bool
-ARM64DeadRegisterDefinitions::processMachineBasicBlock(MachineBasicBlock *MBB) {
-  bool Changed = false;
-  for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end(); I != E;
-       ++I) {
-    MachineInstr *MI = I;
-    for (int i = 0, e = MI->getDesc().getNumDefs(); i != e; ++i) {
-      MachineOperand &MO = MI->getOperand(i);
-      if (MO.isReg() && MO.isDead() && MO.isDef()) {
-        assert(!MO.isImplicit() && "Unexpected implicit def!");
-        DEBUG(dbgs() << "  Dead def operand #" << i << " in:\n    ";
-              MI->print(dbgs()));
-        // Be careful not to change the register if it's a tied operand.
-        if (MI->isRegTiedToUseOperand(i)) {
-          DEBUG(dbgs() << "    Ignoring, def is tied operand.\n");
-          continue;
-        }
-        // Make sure the instruction take a register class that contains
-        // the zero register and replace it if so.
-        unsigned NewReg;
-        switch (MI->getDesc().OpInfo[i].RegClass) {
-        default:
-          DEBUG(dbgs() << "    Ignoring, register is not a GPR.\n");
-          continue;
-        case ARM64::GPR32RegClassID:
-          NewReg = ARM64::WZR;
-          break;
-        case ARM64::GPR64RegClassID:
-          NewReg = ARM64::XZR;
-          break;
-        }
-        DEBUG(dbgs() << "    Replacing with zero register. New:\n      ");
-        MO.setReg(NewReg);
-        DEBUG(MI->print(dbgs()));
-        ++NumDeadDefsReplaced;
-      }
-    }
-  }
-  return Changed;
-}
-
-// Scan the function for instructions that have a dead definition of a
-// register. Replace that register with the zero register when possible.
-bool ARM64DeadRegisterDefinitions::runOnMachineFunction(MachineFunction &mf) {
-  MachineFunction *MF = &mf;
-  bool Changed = false;
-  DEBUG(dbgs() << "***** ARM64DeadRegisterDefinitions *****\n");
-
-  for (MachineFunction::iterator I = MF->begin(), E = MF->end(); I != E; ++I)
-    if (processMachineBasicBlock(I))
-      Changed = true;
-  return Changed;
-}
-
-FunctionPass *llvm::createARM64DeadRegisterDefinitions() {
-  return new ARM64DeadRegisterDefinitions();
-}