fix trivial typos in comments; NFC

llvm-svn: 307004
diff --git a/llvm/lib/Target/SystemZ/SystemZLDCleanup.cpp b/llvm/lib/Target/SystemZ/SystemZLDCleanup.cpp
index 3a0e01d..d4cd89c 100644
--- a/llvm/lib/Target/SystemZ/SystemZLDCleanup.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZLDCleanup.cpp
@@ -127,7 +127,7 @@
   return Copy;
 }
 
-// Create a virtal register in *TLSBaseAddrReg, and populate it by
+// Create a virtual register in *TLSBaseAddrReg, and populate it by
 // inserting a copy instruction after I. Returns the new instruction.
 MachineInstr *SystemZLDCleanup::SetRegister(MachineInstr *I,
                                             unsigned *TLSBaseAddrReg) {