Subzero: Emit ARM build-attributes in the file scope (as header).

src/IceTargetLoweringARM32.h

Index: src/IceTargetLoweringARM32.h
diff --git a/src/IceTargetLoweringARM32.h b/src/IceTargetLoweringARM32.h
index 53c98951993af7a4d08d0d09230877f74bf250fb..bd7d5284a0ddc42303ce5fa90164cb7ca7417dbd 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -308,8 +308,8 @@ class TargetDataARM32 : public TargetDataLowering {
   TargetDataARM32 &operator=(const TargetDataARM32 &) = delete;
 
 public:
-  static TargetDataLowering *create(GlobalContext *Ctx) {
-    return new TargetDataARM32(Ctx);
+  static std::unique_ptr<TargetDataLowering> create(GlobalContext *Ctx) {
+    return std::unique_ptr<TargetDataLowering>(new TargetDataARM32(Ctx));
   }
 
   void lowerGlobals(std::unique_ptr<VariableDeclarationList> Vars) const final;
@@ -324,6 +324,25 @@ private:
   template <typename T> static void emitConstantPool(GlobalContext *Ctx);
 };
 
+class TargetHeaderARM32 final : public TargetHeaderLowering {
+  TargetHeaderARM32() = delete;
+  TargetHeaderARM32(const TargetHeaderARM32 &) = delete;
+  TargetHeaderARM32 &operator=(const TargetHeaderARM32 &) = delete;
+
+public:
+  static std::unique_ptr<TargetHeaderLowering> create(GlobalContext *Ctx) {
+    return std::unique_ptr<TargetHeaderLowering>(new TargetHeaderARM32(Ctx));
+  }
+
+  void lower();
+
+protected:
+  explicit TargetHeaderARM32(GlobalContext *Ctx);
+
+private:
+  ~TargetHeaderARM32() = default;
+};
+
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGARM32_H