commit ddcfd9e6fafdbbe5c973477e537119e73c115ee4
author Alkis Evlogimenos <alkis@evlogimenos.com> Fri Feb 27 01:52:34 2004 +0000
committer Alkis Evlogimenos <alkis@evlogimenos.com> Fri Feb 27 01:52:34 2004 +0000
tree e63a374ee16ecfaff57b2dc810af25e2c9952c43
parent 8fa16e47f88975b577fe1cafce1a366b78b2c340

Fix crash caused by passing register 0 to
MRegisterInfo::isPhysicalRegister().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11894 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineInstr.cpp

diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 030cb7e..1e77988 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -199,7 +199,7 @@
 
 static inline void OutputReg(std::ostream &os, unsigned RegNo,
                              const MRegisterInfo *MRI = 0) {
-  if (MRegisterInfo::isPhysicalRegister(RegNo)) {
+  if (!RegNo || MRegisterInfo::isPhysicalRegister(RegNo)) {
     if (MRI)
       os << "%" << MRI->get(RegNo).Name;
     else