[llvm-commits] [llvm] r71635 - /llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp

[Lang Hames]

Author: lhames
Date: Tue May 12 23:18:47 2009
New Revision: 71635

URL: http://llvm.org/viewvc/llvm-project?rev=71635&view=rev
Log:
Fix for PR4121. If TwoAddressInstructionPass removes a dead def, and the regB
operand was killed, the kill needs to be removed from regB's VarInfo.

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

Modified: llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp?rev=71635&r1=71634&r2=71635&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp (original)
+++ llvm/trunk/lib/CodeGen/TwoAddressInstructionPass.cpp Tue May 12 23:18:47 2009
@@ -858,6 +858,12 @@
                     }
                   }
                 }
+
+                // We're really going to nuke the old inst. If regB was marked
+                // as a kill we need to update its Kills list.
+                if (mi->getOperand(si).isKill())
+                  LV->removeVirtualRegisterKilled(regB, mi);
+
                 mbbi->erase(mi); // Nuke the old inst.
                 mi = nmi;
                 ++NumDeletes;