WIP: Add ARM32 add/ldr/str instructions and operand types.

src/IceTargetLoweringARM32.h

Index: src/IceTargetLoweringARM32.h
diff --git a/src/IceTargetLoweringARM32.h b/src/IceTargetLoweringARM32.h
index 0c21c7c9cd859fb8915f917bb63edbebd4a15a54..e9dd796bb25e5d4c69468f1c2a34435fe06bab07 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -130,6 +130,9 @@ protected:
   // with minimal syntactic overhead, so that the lowering code can
   // look as close to assembly as practical.
 
+  void _add(Variable *Dest, Variable *Src0, Operand *Src1) {
+    Context.insert(InstARM32Add::create(Func, Dest, Src0, Src1));
+  }
   void _ldr(Variable *Dest, OperandARM32Mem *Addr) {
     Context.insert(InstARM32Ldr::create(Func, Dest, Addr));
   }