Improve representation inference for HUnknownOSRValue.

src/hydrogen.h

 // Copyright 2012 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 295 matching lines @@
   }
   HValue* LookupValue(int id) const {
     if (id >= 0 && id < values_.length()) return values_[id];
     return NULL;
   }
 
 #ifdef DEBUG
   void Verify(bool do_full_verify) const;
 #endif
 
+  bool has_osr_loop_entry() {
+    return osr_loop_entry_.is_set();
+  }
+
+  HBasicBlock* osr_loop_entry() {
+    return osr_loop_entry_.get();
+  }
+
+  void set_osr_loop_entry(HBasicBlock* entry) {
+    osr_loop_entry_.set(entry);
+  }
+
+  ZoneList<HUnknownOSRValue*>* osr_values() {
+    return osr_values_.get();
+  }
+
+  void set_osr_values(ZoneList<HUnknownOSRValue*>* values) {
+    osr_values_.set(values);
+  }
+
  private:
   void Postorder(HBasicBlock* block,
                  BitVector* visited,
                  ZoneList<HBasicBlock*>* order,
                  HBasicBlock* loop_header);
   void PostorderLoopBlocks(HLoopInformation* loop,
                            BitVector* visited,
                            ZoneList<HBasicBlock*>* order,
                            HBasicBlock* loop_header);
   HConstant* GetConstant(SetOncePointer<HConstant>* pointer,
@@ skipping 20 matching lines @@
   ZoneList<HValue*> values_;
   ZoneList<HPhi*>* phi_list_;
   SetOncePointer<HConstant> undefined_constant_;
   SetOncePointer<HConstant> constant_1_;
   SetOncePointer<HConstant> constant_minus1_;
   SetOncePointer<HConstant> constant_true_;
   SetOncePointer<HConstant> constant_false_;
   SetOncePointer<HConstant> constant_hole_;
   SetOncePointer<HArgumentsObject> arguments_object_;
 
+  SetOncePointer<HBasicBlock> osr_loop_entry_;
+  SetOncePointer<ZoneList<HUnknownOSRValue*> > osr_values_;
+
   DISALLOW_COPY_AND_ASSIGN(HGraph);
 };
 
 
 Zone* HBasicBlock::zone() { return graph_->zone(); }
 
 
 // Type of stack frame an environment might refer to.
 enum FrameType { JS_FUNCTION, JS_CONSTRUCT, ARGUMENTS_ADAPTOR };
 
@@ skipping 513 matching lines @@
   void VisitTypeof(UnaryOperation* expr);
   void VisitAdd(UnaryOperation* expr);
   void VisitSub(UnaryOperation* expr);
   void VisitBitNot(UnaryOperation* expr);
   void VisitNot(UnaryOperation* expr);
 
   void VisitComma(BinaryOperation* expr);
   void VisitLogicalExpression(BinaryOperation* expr);
   void VisitArithmeticExpression(BinaryOperation* expr);
 
-  void PreProcessOsrEntry(IterationStatement* statement);
+  bool PreProcessOsrEntry(IterationStatement* statement);
   // True iff. we are compiling for OSR and the statement is the entry.
   bool HasOsrEntryAt(IterationStatement* statement);
   void VisitLoopBody(IterationStatement* stmt,
                      HBasicBlock* loop_entry,
                      BreakAndContinueInfo* break_info);
 
   // Create a back edge in the flow graph.  body_exit is the predecessor
   // block and loop_entry is the successor block.  loop_successor is the
   // block where control flow exits the loop normally (e.g., via failure of
   // the condition) and break_block is the block where control flow breaks
@@ skipping 443 matching lines @@
   const char* filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_