vendor/llvm/llvm-trunk-r366426

1 files changed, 8 insertions, 7 deletions

diff --git a/lib/CodeGen/DeadMachineInstructionElim.cpp b/lib/CodeGen/DeadMachineInstructionElim.cpp
index ff44c5660bad..049ce7063307 100644
--- a/lib/CodeGen/DeadMachineInstructionElim.cpp
+++ b/lib/CodeGen/DeadMachineInstructionElim.cpp
@@ -1,9 +1,8 @@
 //===- DeadMachineInstructionElim.cpp - Remove dead machine instructions --===//
 //
-//                     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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -82,9 +81,11 @@ bool DeadMachineInstructionElim::isDead(const MachineInstr *MI) const {
         if (LivePhysRegs.test(Reg) || MRI->isReserved(Reg))
           return false;
       } else {
-        if (!MRI->use_nodbg_empty(Reg))
-          // This def has a non-debug use. Don't delete the instruction!
-          return false;
+        for (const MachineInstr &Use : MRI->use_nodbg_instructions(Reg)) {
+          if (&Use != MI)
+            // This def has a non-debug use. Don't delete the instruction!
+            return false;
+        }
       }
     }
   }