commit 519e1e8c9278ba306d624d39fc013d1504e49bd8
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 19581d750dec10660d127027f3a59de5ed0a0f3f
parent 5a3bab9402796ca7283e8bee4aa0aac75e19b848

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

llvm-svn: 11894

llvm/lib/CodeGen/MachineInstr.cpp

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 030cb7e..1e77988 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/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