Model :upper16: and :lower16: as ARM specific MCTargetExpr. This is a step

in the right direction. It eliminated some hacks and will unblock codegen
work. But it's far from being done. It doesn't reject illegal expressions,
e.g. (FOO - :lower16:BAR). It also doesn't work in Thumb2 mode at all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123369 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMCodeEmitter.cpp

@@ -251,7 +251,7 @@ namespace {
       return Binary;
     }
 
-    unsigned getMovtImmOpValue(const MachineInstr &MI, unsigned Op) const {
+    unsigned getHiLo16ImmOpValue(const MachineInstr &MI, unsigned Op) const {
       return 0;
     }