Refactor PUSH/POP in ARM assemblers.

src/IceAssemblerARM32.h

Index: src/IceAssemblerARM32.h
diff --git a/src/IceAssemblerARM32.h b/src/IceAssemblerARM32.h
index f81fd6d5f5fe2ec37c7cbe3106941f22bc0a2fbf..86b2bd0feb0b5ee339f2560605bc753a270067f1 100644
--- a/src/IceAssemblerARM32.h
+++ b/src/IceAssemblerARM32.h
@@ -38,12 +38,6 @@
 namespace Ice {
 namespace ARM32 {
 
-/// Encoding of an ARM 32-bit instruction.
-using IValueT = uint32_t;
-
-/// An Offset value (+/-) used in an ARM 32-bit instruction.
-using IOffsetT = int32_t;
-
 /// Handles encoding of bottom/top 16 bits of an address using movw/movt.
 class MoveRelocatableFixup final : public AssemblerFixup {
   MoveRelocatableFixup &operator=(const MoveRelocatableFixup &) = delete;
@@ -255,7 +249,7 @@ public:
   void orr(const Operand *OpRd, const Operand *OpRn, const Operand *OpSrc1,
            bool SetFlags, CondARM32::Cond Cond);
 
-  void pop(const Operand *OpRt, CondARM32::Cond Cond);
+  void pop(const Variable *OpRt, CondARM32::Cond Cond);
 
   // Note: Registers is a bitset, where bit n corresponds to register Rn.
   void popList(const IValueT Registers, CondARM32::Cond Cond);