Subzero: Use C++11 member initializers where practical.

src/IceTargetLowering.h

 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- 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 TargetLowering, LoweringContext, and
@@ skipping 21 matching lines @@
 // instructions in a node, and insert new (lowered) instructions at
 // the current point.  Along with the instruction list container and
 // associated iterators, it holds the current node, which is needed
 // when inserting new instructions in order to track whether variables
 // are used as single-block or multi-block.
 class LoweringContext {
   LoweringContext(const LoweringContext &) = delete;
   LoweringContext &operator=(const LoweringContext &) = delete;
 
 public:
-  LoweringContext() : Node(nullptr), LastInserted(nullptr) {}
-  ~LoweringContext() {}
+  LoweringContext() = default;
+  ~LoweringContext() = default;
   void init(CfgNode *Node);
   Inst *getNextInst() const {
     if (Next == End)
       return nullptr;
     return Next;
   }
   Inst *getNextInst(InstList::iterator &Iter) const {
     advanceForward(Iter);
     if (Iter == End)
       return nullptr;
     return Iter;
   }
   CfgNode *getNode() const { return Node; }
   bool atEnd() const { return Cur == End; }
   InstList::iterator getCur() const { return Cur; }
   InstList::iterator getNext() const { return Next; }
   InstList::iterator getEnd() const { return End; }
   void insert(Inst *Inst);
   Inst *getLastInserted() const;
   void advanceCur() { Cur = Next; }
   void advanceNext() { advanceForward(Next); }
   void rewind();
   void setInsertPoint(const InstList::iterator &Position) { Next = Position; }
 
 private:
   // Node is the argument to Inst::updateVars().
-  CfgNode *Node;
-  Inst *LastInserted;
+  CfgNode *Node = nullptr;
+  Inst *LastInserted = nullptr;
   // Cur points to the current instruction being considered.  It is
   // guaranteed to point to a non-deleted instruction, or to be End.
   InstList::iterator Cur;
   // Next doubles as a pointer to the next valid instruction (if any),
   // and the new-instruction insertion point.  It is also updated for
   // the caller in case the lowering consumes more than one high-level
   // instruction.  It is guaranteed to point to a non-deleted
   // instruction after Cur, or to be End.  TODO: Consider separating
   // the notion of "next valid instruction" and "new instruction
   // insertion point", to avoid confusion when previously-deleted
@@ skipping 137 matching lines @@
   virtual void emit(const ConstantFloat *C) const = 0;
   virtual void emit(const ConstantDouble *C) const = 0;
 
   // Performs target-specific argument lowering.
   virtual void lowerArguments() = 0;
 
   virtual void initNodeForLowering(CfgNode *) {}
   virtual void addProlog(CfgNode *Node) = 0;
   virtual void addEpilog(CfgNode *Node) = 0;
 
-  virtual ~TargetLowering() {}
+  virtual ~TargetLowering() = default;
 
 protected:
   explicit TargetLowering(Cfg *Func);
   virtual void lowerAlloca(const InstAlloca *Inst) = 0;
   virtual void lowerArithmetic(const InstArithmetic *Inst) = 0;
   virtual void lowerAssign(const InstAssign *Inst) = 0;
   virtual void lowerBr(const InstBr *Inst) = 0;
   virtual void lowerCall(const InstCall *Inst) = 0;
   virtual void lowerCast(const InstCast *Inst) = 0;
   virtual void lowerFcmp(const InstFcmp *Inst) = 0;
@@ skipping 76 matching lines @@
                            SizeT MaxSrcs);
 
   void
   _bundle_lock(InstBundleLock::Option BundleOption = InstBundleLock::Opt_None) {
     Context.insert(InstBundleLock::create(Func, BundleOption));
   }
   void _bundle_unlock() { Context.insert(InstBundleUnlock::create(Func)); }
 
   Cfg *Func;
   GlobalContext *Ctx;
-  bool HasComputedFrame;
-  bool CallsReturnsTwice;
+  bool HasComputedFrame = false;
+  bool CallsReturnsTwice = false;
   // StackAdjustment keeps track of the current stack offset from its
   // natural location, as arguments are pushed for a function call.
-  int32_t StackAdjustment;
-  SizeT NextLabelNumber;
+  int32_t StackAdjustment = 0;
+  SizeT NextLabelNumber = 0;
   LoweringContext Context;
 
   // Runtime helper function names
   const static constexpr char *H_bitcast_16xi1_i16 = "__Sz_bitcast_16xi1_i16";
   const static constexpr char *H_bitcast_8xi1_i8 = "__Sz_bitcast_8xi1_i8";
   const static constexpr char *H_bitcast_i16_16xi1 = "__Sz_bitcast_i16_16xi1";
   const static constexpr char *H_bitcast_i8_8xi1 = "__Sz_bitcast_i8_8xi1";
   const static constexpr char *H_call_ctpop_i32 = "__popcountsi2";
   const static constexpr char *H_call_ctpop_i64 = "__popcountdi2";
   const static constexpr char *H_call_longjmp = "longjmp";
@@ skipping 17 matching lines @@
   const static constexpr char *H_srem_i64 = "__moddi3";
   const static constexpr char *H_udiv_i64 = "__udivdi3";
   const static constexpr char *H_uitofp_4xi32_4xf32 = "__Sz_uitofp_4xi32_4xf32";
   const static constexpr char *H_uitofp_i32_f32 = "__Sz_uitofp_i32_f32";
   const static constexpr char *H_uitofp_i32_f64 = "__Sz_uitofp_i32_f64";
   const static constexpr char *H_uitofp_i64_f32 = "__Sz_uitofp_i64_f32";
   const static constexpr char *H_uitofp_i64_f64 = "__Sz_uitofp_i64_f64";
   const static constexpr char *H_urem_i64 = "__umoddi3";
 
 private:
-  int32_t SnapshotStackAdjustment;
+  int32_t SnapshotStackAdjustment = 0;
 };
 
 // TargetDataLowering is used for "lowering" data including initializers
 // for global variables, and the internal constant pools.  It is separated
 // out from TargetLowering because it does not require a Cfg.
 class TargetDataLowering {
   TargetDataLowering() = delete;
   TargetDataLowering(const TargetDataLowering &) = delete;
   TargetDataLowering &operator=(const TargetDataLowering &) = delete;
 
@@ skipping 34 matching lines @@
   virtual void lower() {}
 
 protected:
   explicit TargetHeaderLowering(GlobalContext *Ctx) : Ctx(Ctx) {}
   GlobalContext *Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERING_H