Remove redundant foldMemoryOperand variants and other code clean up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44517 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h
index 7ca06bb..61a9738 100644
--- a/lib/CodeGen/VirtRegMap.h
+++ b/lib/CodeGen/VirtRegMap.h
@@ -280,10 +280,9 @@
     }
 
     /// @brief Updates information about the specified virtual register's value
-    /// folded into newMI machine instruction.  The OpNum argument indicates the
-    /// operand number of OldMI that is folded.
-    void virtFolded(unsigned VirtReg, MachineInstr *OldMI, unsigned OpNum,
-                    MachineInstr *NewMI);
+    /// folded into newMI machine instruction.
+    void virtFolded(unsigned VirtReg, MachineInstr *OldMI, MachineInstr *NewMI,
+                    ModRef MRInfo);
 
     /// @brief Updates information about the specified virtual register's value
     /// folded into the specified machine instruction.