Implement a type recording ToBoolean IC.

src/objects.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 772 matching lines @@
 
   // Returns true if this object is an instance of the specified
   // function template.
   inline bool IsInstanceOf(FunctionTemplateInfo* type);
 
   inline bool IsStruct();
 #define DECLARE_STRUCT_PREDICATE(NAME, Name, name) inline bool Is##Name();
   STRUCT_LIST(DECLARE_STRUCT_PREDICATE)
 #undef DECLARE_STRUCT_PREDICATE
 
+  INLINE(bool IsSpecObject());
+
   // Oddball testing.
   INLINE(bool IsUndefined());
   INLINE(bool IsNull());
   INLINE(bool IsTheHole());  // Shadows MaybeObject's implementation.
   INLINE(bool IsTrue());
   INLINE(bool IsFalse());
   inline bool IsArgumentsMarker();
 
   // Extract the number.
   inline double Number();
@@ skipping 2670 matching lines @@
     BUILTIN,
     LOAD_IC,
     KEYED_LOAD_IC,
     CALL_IC,
     KEYED_CALL_IC,
     STORE_IC,
     KEYED_STORE_IC,
     UNARY_OP_IC,
     BINARY_OP_IC,
     COMPARE_IC,
+    TO_BOOLEAN_IC,
     // No more than 16 kinds. The value currently encoded in four bits in
     // Flags.
 
     // Pseudo-kinds.
     REGEXP = BUILTIN,
     FIRST_IC_KIND = LOAD_IC,
-    LAST_IC_KIND = COMPARE_IC
+    LAST_IC_KIND = TO_BOOLEAN_IC
   };
 
   enum {
     NUMBER_OF_KINDS = LAST_IC_KIND + 1
   };
 
   typedef int ExtraICState;
 
   static const ExtraICState kNoExtraICState = 0;
 
@@ skipping 45 matching lines @@
   inline int arguments_count();  // Only valid for call IC stubs.
 
   // Testers for IC stub kinds.
   inline bool is_inline_cache_stub();
   inline bool is_load_stub() { return kind() == LOAD_IC; }
   inline bool is_keyed_load_stub() { return kind() == KEYED_LOAD_IC; }
   inline bool is_store_stub() { return kind() == STORE_IC; }
   inline bool is_keyed_store_stub() { return kind() == KEYED_STORE_IC; }
   inline bool is_call_stub() { return kind() == CALL_IC; }
   inline bool is_keyed_call_stub() { return kind() == KEYED_CALL_IC; }
-  inline bool is_unary_op_stub() {
-    return kind() == UNARY_OP_IC;
-  }
-  inline bool is_binary_op_stub() {
-    return kind() == BINARY_OP_IC;
-  }
+  inline bool is_unary_op_stub() { return kind() == UNARY_OP_IC; }
+  inline bool is_binary_op_stub() { return kind() == BINARY_OP_IC; }
   inline bool is_compare_ic_stub() { return kind() == COMPARE_IC; }
+  inline bool is_to_boolean_ic_stub() { return kind() == TO_BOOLEAN_IC; }
 
   // [major_key]: For kind STUB or BINARY_OP_IC, the major key.
   inline int major_key();
   inline void set_major_key(int value);
 
   // [optimizable]: For FUNCTION kind, tells if it is optimizable.
   inline bool optimizable();
   inline void set_optimizable(bool value);
 
   // [has_deoptimization_support]: For FUNCTION kind, tells if it has
@@ skipping 21 matching lines @@
   // [stack_check_table_start]: For kind FUNCTION, the offset in the
   // instruction stream where the stack check table starts.
   inline unsigned stack_check_table_offset();
   inline void set_stack_check_table_offset(unsigned offset);
 
   // [check type]: For kind CALL_IC, tells how to check if the
   // receiver is valid for the given call.
   inline CheckType check_type();
   inline void set_check_type(CheckType value);
 
-  // [type-recording unary op type]: For all UNARY_OP_IC.
+  // [type-recording unary op type]: For kind UNARY_OP_IC.
   inline byte unary_op_type();
   inline void set_unary_op_type(byte value);
 
-  // [type-recording binary op type]: For all TYPE_RECORDING_BINARY_OP_IC.
+  // [type-recording binary op type]: For kind BINARY_OP_IC.
   inline byte binary_op_type();
   inline void set_binary_op_type(byte value);
   inline byte binary_op_result_type();
   inline void set_binary_op_result_type(byte value);
 
-  // [compare state]: For kind compare IC stubs, tells what state the
-  // stub is in.
+  // [compare state]: For kind COMPARE_IC, tells what state the stub is in.
   inline byte compare_state();
   inline void set_compare_state(byte value);
 
+  // [to_boolean_foo]: For kind TO_BOOLEAN_IC tells what state the stub is in.
+  inline byte to_boolean_state();
+  inline void set_to_boolean_state(byte value);
+
   // Get the safepoint entry for the given pc.
   SafepointEntry GetSafepointEntry(Address pc);
 
   // Mark this code object as not having a stack check table.  Assumes kind
   // is FUNCTION.
   void SetNoStackCheckTable();
 
   // Find the first map in an IC stub.
   Map* FindFirstMap();
 
@@ skipping 121 matching lines @@
   // the Code object header.
   static const int kHeaderSize =
       (kHeaderPaddingStart + kCodeAlignmentMask) & ~kCodeAlignmentMask;
 
   // Byte offsets within kKindSpecificFlagsOffset.
   static const int kStubMajorKeyOffset = kKindSpecificFlagsOffset;
   static const int kOptimizableOffset = kKindSpecificFlagsOffset;
   static const int kStackSlotsOffset = kKindSpecificFlagsOffset;
   static const int kCheckTypeOffset = kKindSpecificFlagsOffset;
 
-  static const int kCompareStateOffset = kStubMajorKeyOffset + 1;
   static const int kUnaryOpTypeOffset = kStubMajorKeyOffset + 1;
   static const int kBinaryOpTypeOffset = kStubMajorKeyOffset + 1;
+  static const int kCompareStateOffset = kStubMajorKeyOffset + 1;
+  static const int kToBooleanTypeOffset = kStubMajorKeyOffset + 1;
   static const int kHasDeoptimizationSupportOffset = kOptimizableOffset + 1;
 
   static const int kBinaryOpReturnTypeOffset = kBinaryOpTypeOffset + 1;
   static const int kAllowOSRAtLoopNestingLevelOffset =
       kHasDeoptimizationSupportOffset + 1;
 
   static const int kSafepointTableOffsetOffset = kStackSlotsOffset + kIntSize;
   static const int kStackCheckTableOffsetOffset = kStackSlotsOffset + kIntSize;
 
   // Flags layout.
@@ skipping 3402 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_