Refactor PUSH/POP in ARM assemblers.

src/IceInstARM32.h

Index: src/IceInstARM32.h
diff --git a/src/IceInstARM32.h b/src/IceInstARM32.h
index a2aba571a8497fe81f2bed87eadead279039af18..13eb5c60a34afcf35057a73c1efec2881f8de8d2 100644
--- a/src/IceInstARM32.h
+++ b/src/IceInstARM32.h
@@ -428,6 +428,8 @@ public:
   static const char *getVecWidthString(Type Ty);
   static CondARM32::Cond getOppositeCondition(CondARM32::Cond Cond);
 
+  template <AssemblyOutputForm> void startNextAsmInst(const Cfg *Func) const;
+
   /// Called inside derived methods emit() to communicate that multiple
   /// instructions are being generated. Used by emitIAS() methods to
   /// generate textual fixups for instructions that are not yet
@@ -1065,8 +1067,11 @@ public:
   static InstARM32Pop *create(Cfg *Func, const VarList &Dests) {
     return new (Func->allocate<InstARM32Pop>()) InstARM32Pop(Func, Dests);
   }
-  void emit(const Cfg *Func) const override;
-  void emitIAS(const Cfg *Func) const override;
+  void emit(const Cfg *Func) const override { assemble<TextualAssembly>(Func); }
+  void emitIAS(const Cfg *Func) const override {
+    assemble<BinaryAssembly>(Func);
+  }
+  template <AssemblyOutputForm> void assemble(const Cfg *Func) const;
   void dump(const Cfg *Func) const override;
   static bool classof(const Inst *Inst) { return isClassof(Inst, Pop); }
 
@@ -1087,8 +1092,11 @@ public:
   static InstARM32Push *create(Cfg *Func, const VarList &Srcs) {
     return new (Func->allocate<InstARM32Push>()) InstARM32Push(Func, Srcs);
   }
-  void emit(const Cfg *Func) const override;
-  void emitIAS(const Cfg *Func) const override;
+  void emit(const Cfg *Func) const override { assemble<TextualAssembly>(Func); }
+  void emitIAS(const Cfg *Func) const override {
+    assemble<BinaryAssembly>(Func);
+  }
+  template <AssemblyOutputForm> void assemble(const Cfg *Func) const;
   void dump(const Cfg *Func) const override;
   static bool classof(const Inst *Inst) { return isClassof(Inst, Push); }