Experimental: push the new code generator infrastructure into the...

src/virtual-frame-ia32.h

 // Copyright 2008 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 40 matching lines @@
     SYNCED,
     NOT_SYNCED
   };
 
   // The default constructor creates an invalid frame element.
   FrameElement() {
     type_ = TypeField::encode(INVALID) | SyncField::encode(NOT_SYNCED);
     data_.reg_ = no_reg;
   }
 
+  // Factory function to construct an invalid frame element.
+  static FrameElement InvalidElement() {
+    FrameElement result;
+    return result;
+  }
+
   // Factory function to construct an in-memory frame element.
   static FrameElement MemoryElement() {
     FrameElement result;
     result.type_ = TypeField::encode(MEMORY) | SyncField::encode(SYNCED);
     // In-memory elements have no useful data.
     result.data_.reg_ = no_reg;
     return result;
   }
 
   // Factory function to construct an in-register frame element.
@@ skipping 19 matching lines @@
   void set_sync() {
     ASSERT(type() != MEMORY);
     type_ = (type_ & ~SyncField::mask()) | SyncField::encode(SYNCED);
   }
 
   void clear_sync() {
     ASSERT(type() != MEMORY);
     type_ = (type_ & ~SyncField::mask()) | SyncField::encode(NOT_SYNCED);
   }
 
+  bool is_valid() const { return type() != INVALID; }
   bool is_memory() const { return type() == MEMORY; }
   bool is_register() const { return type() == REGISTER; }
   bool is_constant() const { return type() == CONSTANT; }
 
   Register reg() const {
     ASSERT(type() == REGISTER);
     return data_.reg_;
   }
 
   Handle<Object> handle() const {
@@ skipping 125 matching lines @@
   void AllocateStackSlots(int count);
 
   // The current top of the expression stack as an assembly operand.
   Operand Top() const { return Operand(esp, 0); }
 
   // An element of the expression stack as an assembly operand.
   Operand ElementAt(int index) const {
     return Operand(esp, index * kPointerSize);
   }
 
+  // Random-access store to a frame-top relative frame element.  The result
+  // becomes owned by the frame and is invalidated.
+  void SetElementAt(int index, Result* value);
+
   // A frame-allocated local as an assembly operand.
   Operand LocalAt(int index) const {
     ASSERT(0 <= index);
     ASSERT(index < local_count_);
     return Operand(ebp, kLocal0Offset - index * kPointerSize);
   }
 
   // Push a copy of the value of a local frame slot on top of the frame.
   void LoadLocalAt(int index) {
     LoadFrameSlotAt(local0_index() + index);
   }
 
+  // Push the value of a local frame slot on top of the frame and invalidate
+  // the local slot.  The slot should be written to before trying to read
+  // from it again.
+  void TakeLocalAt(int index) {
+    TakeFrameSlotAt(local0_index() + index);
+  }
+
   // Store the top value on the virtual frame into a local frame slot.  The
   // value is left in place on top of the frame.
   void StoreToLocalAt(int index) {
     StoreToFrameSlotAt(local0_index() + index);
   }
 
   // The function frame slot.
   Operand Function() const { return Operand(ebp, kFunctionOffset); }
 
   // The context frame slot.
   Operand Context() const { return Operand(ebp, kContextOffset); }
 
   // A parameter as an assembly operand.
   Operand ParameterAt(int index) const {
     ASSERT(-1 <= index);  // -1 is the receiver.
     ASSERT(index < parameter_count_);
     return Operand(ebp, (1 + parameter_count_ - index) * kPointerSize);
   }
 
   // Push a copy of the value of a parameter frame slot on top of the frame.
   void LoadParameterAt(int index) {
     LoadFrameSlotAt(param0_index() + index);
   }
 
+  // Push the value of a paramter frame slot on top of the frame and
+  // invalidate the parameter slot.  The slot should be written to before
+  // trying to read from it again.
+  void TakeParameterAt(int index) {
+    TakeFrameSlotAt(param0_index() + index);
+  }
+
   // Store the top value on the virtual frame into a parameter frame slot.
   // The value is left in place on top of the frame.
   void StoreToParameterAt(int index) {
     StoreToFrameSlotAt(param0_index() + index);
   }
 
   // The receiver frame slot.
   Operand Receiver() const { return ParameterAt(-1); }
 
   // Push a try-catch or try-finally handler on top of the virtual frame.
   void PushTryHandler(HandlerType type);
 
   // Call a code stub, given the number of arguments it expects on (and
   // removes from) the top of the physical frame.
   void CallStub(CodeStub* stub, int frame_arg_count);
+  Result CallStub(CodeStub* stub, Result* arg, int frame_arg_count);
   Result CallStub(CodeStub* stub,
                   Result* arg0,
                   Result* arg1,
                   int frame_arg_count);
 
   // Call the runtime, given the number of arguments expected on (and
   // removed from) the top of the physical frame.
   void CallRuntime(Runtime::Function* f, int frame_arg_count);
   void CallRuntime(Runtime::FunctionId id, int frame_arg_count);
 
@@ skipping 135 matching lines @@
   void SyncRange(int begin, int end);
 
   // Sync a single element, assuming that its index is less than
   // or equal to stack pointer + 1.
   void RawSyncElementAt(int index);
 
   // Push a copy of a frame slot (typically a local or parameter) on top of
   // the frame.
   void LoadFrameSlotAt(int index);
 
+  // Push a the value of a frame slot (typically a local or parameter) on
+  // top of the frame and invalidate the slot.
+  void TakeFrameSlotAt(int index);
+
   // Store the value on top of the frame to a frame slot (typically a local
   // or parameter).
   void StoreToFrameSlotAt(int index);
 
   // Spill the topmost elements of the frame to memory (eg, they are the
   // arguments to a call) and all registers.
   void PrepareForCall(int count);
 
   // Move frame elements currently in registers or constants, that
   // should be in memory in the expected frame, to memory.
@@ skipping 13 matching lines @@
   // Called after all register-to-memory and register-to-register
   // moves have been made.  After this function returns, the frames
   // should be equal.
   void MergeMoveMemoryToRegisters(VirtualFrame *expected);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_VIRTUAL_FRAME_IA32_H_