Subzero: Improve class definition hygiene.

src/IceTargetLoweringX8632.h

 //===- subzero/src/IceTargetLoweringX8632.h - x86-32 lowering ---*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the TargetLoweringX8632 class, which
 // implements the TargetLowering interface for the x86-32
 // architecture.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICETARGETLOWERINGX8632_H
 #define SUBZERO_SRC_ICETARGETLOWERINGX8632_H
 
 #include "assembler_ia32.h"
 #include "IceDefs.h"
 #include "IceInstX8632.h"
 #include "IceRegistersX8632.h"
 #include "IceTargetLowering.h"
 
 namespace Ice {
 
 class TargetX8632 : public TargetLowering {
+  TargetX8632() = delete;
   TargetX8632(const TargetX8632 &) = delete;
   TargetX8632 &operator=(const TargetX8632 &) = delete;
 
 public:
   static TargetX8632 *create(Cfg *Func) { return new TargetX8632(Func); }
 
   void translateOm1() override;
   void translateO2() override;
   bool doBranchOpt(Inst *I, const CfgNode *NextNode) override;
 
@@ skipping 33 matching lines @@
 
   enum X86InstructionSet {
     // SSE2 is the PNaCl baseline instruction set.
     SSE2,
     SSE4_1
   };
 
   X86InstructionSet getInstructionSet() const { return InstructionSet; }
 
 protected:
-  TargetX8632(Cfg *Func);
+  explicit TargetX8632(Cfg *Func);
 
   void postLower() override;
 
   void lowerAlloca(const InstAlloca *Inst) override;
   void lowerArithmetic(const InstArithmetic *Inst) override;
   void lowerAssign(const InstAssign *Inst) override;
   void lowerBr(const InstBr *Inst) override;
   void lowerCall(const InstCall *Inst) override;
   void lowerCast(const InstCast *Inst) override;
   void lowerExtractElement(const InstExtractElement *Inst) override;
@@ skipping 410 matching lines @@
 
 public:
   static TargetDataLowering *create(GlobalContext *Ctx) {
     return new TargetDataX8632(Ctx);
   }
 
   void lowerGlobals(std::unique_ptr<VariableDeclarationList> Vars) const final;
   void lowerConstants() const final;
 
 protected:
-  TargetDataX8632(GlobalContext *Ctx);
+  explicit TargetDataX8632(GlobalContext *Ctx);
 
 private:
   void lowerGlobal(const VariableDeclaration &Var) const;
   ~TargetDataX8632() override {}
   template <typename T> static void emitConstantPool(GlobalContext *Ctx);
 };
 
 template <> void ConstantInteger32::emit(GlobalContext *Ctx) const;
 template <> void ConstantInteger64::emit(GlobalContext *Ctx) const;
 template <> void ConstantFloat::emit(GlobalContext *Ctx) const;
 template <> void ConstantDouble::emit(GlobalContext *Ctx) const;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8632_H