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

utils/TableGen/EDEmitter.cpp

@@ -564,7 +564,7 @@ static int ARMFlagFromOpName(LiteralConstantEmitter *type,
   REG("QQQQPR");
 
   IMM("i32imm");
-  IMM("movt_imm");
+  IMM("i32imm_hilo16");
   IMM("bf_inv_mask_imm");
   IMM("jtblock_operand");
   IMM("nohash_imm");