Subzero: Emit functions and global initializers in a separate thread.

src/IceCfg.h

 //===- subzero/src/IceCfg.h - Control flow graph ----------------*- 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 Cfg class, which represents the control flow
@@ skipping 12 matching lines @@
 
 namespace Ice {
 
 class Cfg {
   Cfg(const Cfg &) = delete;
   Cfg &operator=(const Cfg &) = delete;
 
 public:
   ~Cfg();
 
-  static std::unique_ptr<Cfg> create(GlobalContext *Ctx) {
-    return std::unique_ptr<Cfg>(new Cfg(Ctx));
+  static std::unique_ptr<Cfg> create(GlobalContext *Ctx,
+                                     uint32_t SequenceNumber) {
+    return std::unique_ptr<Cfg>(new Cfg(Ctx, SequenceNumber));
   }
   // Gets a pointer to the current thread's Cfg.
   static const Cfg *getCurrentCfg() { return ICE_TLS_GET_FIELD(CurrentCfg); }
   static void setCurrentCfg(const Cfg *Func) {
     ICE_TLS_SET_FIELD(CurrentCfg, Func);
   }
   // Gets a pointer to the current thread's Cfg's allocator.
   static ArenaAllocator<> *getCurrentCfgAllocator() {
     assert(ICE_TLS_GET_FIELD(CurrentCfg));
     return ICE_TLS_GET_FIELD(CurrentCfg)->Allocator.get();
   }
 
   GlobalContext *getContext() const { return Ctx; }
+  uint32_t getSequenceNumber() const { return SequenceNumber; }
 
   // Returns true if any of the specified options in the verbose mask
   // are set.  If the argument is omitted, it checks if any verbose
   // options at all are set.
   bool isVerbose(VerboseMask Mask = IceV_All) const { return VMask & Mask; }
   void setVerbose(VerboseMask Mask) { VMask = Mask; }
 
   // Manage the name and return type of the function being translated.
   void setFunctionName(const IceString &Name) { FunctionName = Name; }
   IceString getFunctionName() const { return FunctionName; }
@@ skipping 56 matching lines @@
   void addArg(Variable *Arg);
   const VarList &getArgs() const { return Args; }
   VarList &getArgs() { return Args; }
   void addImplicitArg(Variable *Arg);
   const VarList &getImplicitArgs() const { return ImplicitArgs; }
 
   // Miscellaneous accessors.
   TargetLowering *getTarget() const { return Target.get(); }
   VariablesMetadata *getVMetadata() const { return VMetadata.get(); }
   Liveness *getLiveness() const { return Live.get(); }
-  template <typename T> T *getAssembler() const {
+  template <typename T = Assembler> T *getAssembler() const {
     return static_cast<T *>(TargetAssembler.get());
   }
+  Assembler *releaseAssembler() { return TargetAssembler.release(); }
   bool hasComputedFrame() const;
   bool getFocusedTiming() const { return FocusedTiming; }
   void setFocusedTiming() { FocusedTiming = true; }
 
   // Passes over the CFG.
   void translate();
   // After the CFG is fully constructed, iterate over the nodes and
   // compute the predecessor edges, in the form of
   // CfgNode::InEdges[].
   void computePredecessors();
@@ skipping 15 matching lines @@
   void doBranchOpt();
 
   // Manage the CurrentNode field, which is used for validating the
   // Variable::DefNode field during dumping/emitting.
   void setCurrentNode(const CfgNode *Node) { CurrentNode = Node; }
   void resetCurrentNode() { setCurrentNode(nullptr); }
   const CfgNode *getCurrentNode() const { return CurrentNode; }
 
   void emit();
   void emitIAS();
-  void emitTextHeader(const IceString &MangledName);
+  static void emitTextHeader(const IceString &MangledName, GlobalContext *Ctx,
+                             const Assembler *Asm);
   void dump(const IceString &Message = "");
 
   // Allocate data of type T using the per-Cfg allocator.
   template <typename T> T *allocate() { return Allocator->Allocate<T>(); }
 
   // Allocate an array of data of type T using the per-Cfg allocator.
   template <typename T> T *allocateArrayOf(size_t NumElems) {
     return Allocator->Allocate<T>(NumElems);
   }
 
   // Deallocate data that was allocated via allocate<T>().
   template <typename T> void deallocate(T *Object) {
     Allocator->Deallocate(Object);
   }
 
   // Deallocate data that was allocated via allocateArrayOf<T>().
   template <typename T> void deallocateArrayOf(T *Array) {
     Allocator->Deallocate(Array);
   }
 
 private:
-  Cfg(GlobalContext *Ctx);
+  Cfg(GlobalContext *Ctx, uint32_t SequenceNumber);
 
   GlobalContext *Ctx;
+  uint32_t SequenceNumber; // output order for emission
   VerboseMask VMask;
   IceString FunctionName;
   Type ReturnType;
   bool IsInternalLinkage;
   bool HasError;
   bool FocusedTiming;
   IceString ErrorMessage;
   CfgNode *Entry; // entry basic block
   NodeList Nodes; // linearized node list; Entry should be first
   std::vector<IceString> IdentifierNames;
@@ skipping 19 matching lines @@
   // other uses are possible.
   ICE_TLS_DECLARE_FIELD(const Cfg *, CurrentCfg);
 
 public:
   static void TlsInit() { ICE_TLS_INIT_FIELD(CurrentCfg); }
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECFG_H