1 files changed, 13 insertions, 7 deletions
diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp
index 6e5ca45d5e5e..f0fd0405d69d 100644
--- a/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/lib/CodeGen/MachineRegisterInfo.cpp
@@ -1,9 +1,8 @@
 //===- lib/Codegen/MachineRegisterInfo.cpp --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -155,7 +154,7 @@ unsigned MachineRegisterInfo::createIncompleteVirtualRegister(StringRef Name) {
 /// createVirtualRegister - Create and return a new virtual register in the
 /// function with the specified register class.
 ///
-unsigned
+Register
 MachineRegisterInfo::createVirtualRegister(const TargetRegisterClass *RegClass,
                                            StringRef Name) {
   assert(RegClass && "Cannot create register without RegClass!");
@@ -170,7 +169,7 @@ MachineRegisterInfo::createVirtualRegister(const TargetRegisterClass *RegClass,
   return Reg;
 }
 
-unsigned MachineRegisterInfo::cloneVirtualRegister(unsigned VReg,
+Register MachineRegisterInfo::cloneVirtualRegister(Register VReg,
                                                    StringRef Name) {
   unsigned Reg = createIncompleteVirtualRegister(Name);
   VRegInfo[Reg].first = VRegInfo[VReg].first;
@@ -185,7 +184,7 @@ void MachineRegisterInfo::setType(unsigned VReg, LLT Ty) {
   VRegToType[VReg] = Ty;
 }
 
-unsigned
+Register
 MachineRegisterInfo::createGenericVirtualRegister(LLT Ty, StringRef Name) {
   // New virtual register number.
   unsigned Reg = createIncompleteVirtualRegister(Name);
@@ -424,6 +423,13 @@ bool MachineRegisterInfo::hasOneNonDBGUse(unsigned RegNo) const {
   return ++UI == use_nodbg_end();
 }
 
+bool MachineRegisterInfo::hasOneNonDBGUser(unsigned RegNo) const {
+  use_instr_nodbg_iterator UI = use_instr_nodbg_begin(RegNo);
+  if (UI == use_instr_nodbg_end())
+    return false;
+  return ++UI == use_instr_nodbg_end();
+}
+
 /// clearKillFlags - Iterate over all the uses of the given register and
 /// clear the kill flag from the MachineOperand. This function is used by
 /// optimization passes which extend register lifetimes and need only