Add dynamic stack frame alignment to optimized functions with untagged doubles on the stack.

src/ia32/lithium-ia32.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 2055 matching lines @@
 
 class LChunkBuilder;
 class LChunk: public ZoneObject {
  public:
   LChunk(CompilationInfo* info, HGraph* graph)
     : spill_slot_count_(0),
       info_(info),
       graph_(graph),
       instructions_(32),
       pointer_maps_(8),
+      num_double_slots_(0),
       inlined_closures_(1) { }
 
   void AddInstruction(LInstruction* instruction, HBasicBlock* block);
   LConstantOperand* DefineConstantOperand(HConstant* constant);
   Handle<Object> LookupLiteral(LConstantOperand* operand) const;
   Representation LookupLiteralRepresentation(LConstantOperand* operand) const;
 
   int GetNextSpillIndex(bool is_double);
   LOperand* GetNextSpillSlot(bool is_double);
 
   int ParameterAt(int index);
   int GetParameterStackSlot(int index) const;
   int spill_slot_count() const { return spill_slot_count_; }
+  int num_double_slots() const { return num_double_slots_; }
+
   CompilationInfo* info() const { return info_; }
   HGraph* graph() const { return graph_; }
   const ZoneList<LInstruction*>* instructions() const { return &instructions_; }
   void AddGapMove(int index, LOperand* from, LOperand* to);
   LGap* GetGapAt(int index) const;
   bool IsGapAt(int index) const;
   int NearestGapPos(int index) const;
   void MarkEmptyBlocks();
   const ZoneList<LPointerMap*>* pointer_maps() const { return &pointer_maps_; }
   LLabel* GetLabel(int block_id) const {
@@ skipping 21 matching lines @@
   void AddInlinedClosure(Handle<JSFunction> closure) {
     inlined_closures_.Add(closure);
   }
 
  private:
   int spill_slot_count_;
   CompilationInfo* info_;
   HGraph* const graph_;
   ZoneList<LInstruction*> instructions_;
   ZoneList<LPointerMap*> pointer_maps_;
+  int num_double_slots_;
   ZoneList<Handle<JSFunction> > inlined_closures_;
 };
 
 
 class LChunkBuilder BASE_EMBEDDED {
  public:
   LChunkBuilder(CompilationInfo* info, HGraph* graph, LAllocator* allocator)
       : chunk_(NULL),
         info_(info),
         graph_(graph),
@@ skipping 150 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_