Fix small bug in handling instructions with more than one implicitly defined operand.

ProcessImplicitDefs would only mark one operand per instruction with <undef>.
This fixed PR6086.

llvm-svn: 95319
diff --git a/llvm/lib/CodeGen/ProcessImplicitDefs.cpp b/llvm/lib/CodeGen/ProcessImplicitDefs.cpp
index a00f450..a0a781b 100644
--- a/llvm/lib/CodeGen/ProcessImplicitDefs.cpp
+++ b/llvm/lib/CodeGen/ProcessImplicitDefs.cpp
@@ -264,8 +264,8 @@
         }
       }
       RUses.clear();
+      ModInsts.clear();
     }
-    ModInsts.clear();
     ImpDefRegs.clear();
     ImpDefMIs.clear();
   }