Implement LowerOperationWrapper for legalizer. 
Also a few signed comparison fixes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62665 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PIC16/PIC16InstrInfo.cpp b/lib/Target/PIC16/PIC16InstrInfo.cpp
index 47ac6d3..5fe5dac 100644
--- a/lib/Target/PIC16/PIC16InstrInfo.cpp
+++ b/lib/Target/PIC16/PIC16InstrInfo.cpp
@@ -138,9 +138,8 @@
 }
 
 bool PIC16InstrInfo::isMoveInstr(const MachineInstr &MI,
-                                 unsigned &SrcReg, unsigned &DestReg,
-                                 unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
-  SrcSubIdx = DstSubIdx = 0; // No sub-registers.
+                                         unsigned &SrcReg,
+                                         unsigned &DestReg) const {
 
   if (MI.getOpcode() == PIC16::copy_fsr
       || MI.getOpcode() == PIC16::copy_w) {