Translate loops without using subgraphs.

src/hydrogen.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 659 matching lines @@
 #undef INLINE_FUNCTION_GENERATOR_DECLARATION
 
   void Bailout(const char* reason);
 
   void PreProcessOsrEntry(IterationStatement* statement);
 
   HBasicBlock* CreateJoin(HBasicBlock* first,
                           HBasicBlock* second,
                           int join_id);
   HBasicBlock* CreateWhile(IterationStatement* statement,
-                           HBasicBlock* condition_entry,
-                           HBasicBlock* exit_block,
+                           HBasicBlock* loop_entry,
+                           HBasicBlock* cond_false,
                            HBasicBlock* body_exit,
-                           HBasicBlock* break_block,
-                           HBasicBlock* loop_entry,
-                           HBasicBlock* loop_exit);
+                           HBasicBlock* break_block);
   HBasicBlock* CreateDoWhile(IterationStatement* statement,
                              HBasicBlock* body_entry,
                              HBasicBlock* go_back,
                              HBasicBlock* exit_block,
                              HBasicBlock* break_block);
   HBasicBlock* CreateEndless(IterationStatement* statement,
                              HBasicBlock* body_entry,
                              HBasicBlock* body_exit,
                              HBasicBlock* break_block);
-  HBasicBlock* CreatePeeledWhile(IterationStatement* stmt,
-                                 HBasicBlock* condition_entry,
-                                 HBasicBlock* exit_block,
-                                 HBasicBlock* body_exit,
-                                 HBasicBlock* break_block);
   HBasicBlock* JoinContinue(IterationStatement* statement,
                             HBasicBlock* exit_block,
                             HBasicBlock* continue_block);
 
 
   void AddToSubgraph(HSubgraph* graph, ZoneList<Statement*>* stmts);
   void AddToSubgraph(HSubgraph* graph, Statement* stmt);
   void AddToSubgraph(HSubgraph* graph, Expression* expr);
 
   HValue* Top() const { return environment()->Top(); }
@@ skipping 29 matching lines @@
   virtual void VisitStatements(ZoneList<Statement*>* statements);
 
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   HBasicBlock* CreateBasicBlock(HEnvironment* env);
   HSubgraph* CreateEmptySubgraph();
   HSubgraph* CreateGotoSubgraph(HEnvironment* env);
   HSubgraph* CreateBranchSubgraph(HEnvironment* env);
-  HSubgraph* CreateLoopHeaderSubgraph(HEnvironment* env);
+  HBasicBlock* CreateLoopHeader();
   HSubgraph* CreateInlinedSubgraph(HEnvironment* outer,
                                    Handle<JSFunction> target,
                                    FunctionLiteral* function);
 
   // Helpers for flow graph construction.
   void LookupGlobalPropertyCell(Variable* var,
                                 LookupResult* lookup,
                                 bool is_store);
 
   bool TryArgumentsAccess(Property* expr);
@@ skipping 329 matching lines @@
   const char* filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_