Add encoder method for ARM load/store shifted register offset operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118513 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMCodeEmitter.cpp b/lib/Target/ARM/ARMCodeEmitter.cpp
index 15b3aab..7f073d7 100644
--- a/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -177,6 +177,8 @@
       const { return 0; }
     unsigned getBitfieldInvertedMaskOpValue(const MachineInstr &MI,
                                             unsigned Op) const { return 0; }
+    uint32_t getLdStSORegOpValue(const MachineInstr &MI, unsigned OpIdx)
+      const { return 0; }
 
     unsigned getAddrModeImm12OpValue(const MachineInstr &MI, unsigned Op)
       const {