1 files changed, 0 insertions, 91 deletions
diff --git a/lib/CodeGen/LivePhysRegs.cpp b/lib/CodeGen/LivePhysRegs.cpp
deleted file mode 100644
index 2e103333c7..0000000000
--- a/lib/CodeGen/LivePhysRegs.cpp
+++ /dev/null
@@ -1,91 +0,0 @@
-//===--- LivePhysRegs.cpp - Live Physical Register Set --------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the LivePhysRegs utility for tracking liveness of
-// physical registers across machine instructions in forward or backward order.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/LivePhysRegs.h"
-#include "llvm/CodeGen/MachineInstrBundle.h"
-using namespace llvm;
-
-
-/// We assume the high bits of a physical super-register are not preserved
-/// unless the instruction has an implicit-use operand reading the
-/// super-register.
-
-/// \brief Remove all registers from the set that get clobbered by the register
-/// mask.
-void LivePhysRegs::removeRegsInMask(const MachineOperand &MO) {
-  SparseSet<unsigned>::iterator LRI = LiveRegs.begin();
-  while (LRI != LiveRegs.end()) {
-    if (MO.clobbersPhysReg(*LRI))
-      LRI = LiveRegs.erase(LRI);
-    else
-      ++LRI;
-  }
-}
-
-/// Simulates liveness when stepping backwards over an instruction(bundle):
-/// Remove Defs, add uses. This is the recommended way of calculating liveness.
-void LivePhysRegs::stepBackward(const MachineInstr &MI) {
-  // Remove defined registers and regmask kills from the set.
-  for (ConstMIBundleOperands O(&MI); O.isValid(); ++O) {
-    if (O->isReg()) {
-      if (!O->isDef())
-        continue;
-      unsigned Reg = O->getReg();
-      if (Reg == 0)
-        continue;
-      removeReg(Reg);
-    } else if (O->isRegMask())
-      removeRegsInMask(*O);
-  }
-
-  // Add uses to the set.
-  for (ConstMIBundleOperands O(&MI); O.isValid(); ++O) {
-    if (!O->isReg() || !O->readsReg() || O->isUndef())
-      continue;
-    unsigned Reg = O->getReg();
-    if (Reg == 0)
-      continue;
-    addReg(Reg);
-  }
-}
-
-/// Simulates liveness when stepping forward over an instruction(bundle): Remove
-/// killed-uses, add defs. This is the not recommended way, because it depends
-/// on accurate kill flags. If possible use stepBackwards() instead of this
-/// function.
-void LivePhysRegs::stepForward(const MachineInstr &MI) {
-  SmallVector<unsigned, 4> Defs;
-  // Remove killed registers from the set.
-  for (ConstMIBundleOperands O(&MI); O.isValid(); ++O) {
-    if (O->isReg()) {
-      unsigned Reg = O->getReg();
-      if (Reg == 0)
-        continue;
-      if (O->isDef()) {
-        if (!O->isDead())
-          Defs.push_back(Reg);
-      } else {
-        if (!O->isKill())
-          continue;
-        assert(O->isUse());
-        removeReg(Reg);
-      }
-    } else if (O->isRegMask())
-      removeRegsInMask(*O);
-  }
-
-  // Add defs to the set.
-  for (unsigned i = 0, e = Defs.size(); i != e; ++i)
-    addReg(Defs[i]);
-}