From 5cbeeedeaa9a5e3e626b28e96d35595c30660b1d Mon Sep 17 00:00:00 2001
From: Krzysztof Parzyszek <kparzysz@codeaurora.org>
Date: Fri, 7 Oct 2016 14:50:49 +0000
Subject: [PATCH] Only track physical registers in LivePhysRegs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283561 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/LivePhysRegs.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/CodeGen/LivePhysRegs.cpp b/lib/CodeGen/LivePhysRegs.cpp
index 80d6294fb47..78632873642 100644
--- a/lib/CodeGen/LivePhysRegs.cpp
+++ b/lib/CodeGen/LivePhysRegs.cpp
@@ -49,7 +49,7 @@ void LivePhysRegs::stepBackward(const MachineInstr &MI) {
       if (!O->isDef())
         continue;
       unsigned Reg = O->getReg();
-      if (Reg == 0)
+      if (!TargetRegisterInfo::isPhysicalRegister(Reg))
         continue;
       removeReg(Reg);
     } else if (O->isRegMask())
@@ -61,7 +61,7 @@ void LivePhysRegs::stepBackward(const MachineInstr &MI) {
     if (!O->isReg() || !O->readsReg())
       continue;
     unsigned Reg = O->getReg();
-    if (Reg == 0)
+    if (!TargetRegisterInfo::isPhysicalRegister(Reg))
       continue;
     addReg(Reg);
   }
@@ -77,7 +77,7 @@ void LivePhysRegs::stepForward(const MachineInstr &MI,
   for (ConstMIBundleOperands O(MI); O.isValid(); ++O) {
     if (O->isReg()) {
       unsigned Reg = O->getReg();
-      if (Reg == 0)
+      if (!TargetRegisterInfo::isPhysicalRegister(Reg))
         continue;
       if (O->isDef()) {
         // Note, dead defs are still recorded.  The caller should decide how to