[llvm-commits] [llvm] r156867 - /llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Tue May 15 17:20:27 2012
New Revision: 156867

URL: http://llvm.org/viewvc/llvm-project?rev=156867&view=rev
Log:
Handle NewReg==OldReg in renameRegister().

This can happen when widening a virtual register to a super-register
class.

Modified:
    llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp

Modified: llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp?rev=156867&r1=156866&r2=156867&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveDebugVariables.cpp Tue May 15 17:20:27 2012
@@ -721,7 +721,8 @@
 
   if (TargetRegisterInfo::isVirtualRegister(NewReg))
     mapVirtReg(NewReg, UV);
-  virtRegToEqClass.erase(OldReg);
+  if (OldReg != NewReg)
+    virtRegToEqClass.erase(OldReg);
 
   do {
     UV->renameRegister(OldReg, NewReg, SubIdx, TRI);