Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 3c7037dbe83bba2a49e3dcb40a5013d69f72dc80..d50e8ee7a5853d051ab6430430f58677843bc9df 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4990,10 +4990,6 @@ class Code: public HeapObject {
   inline CheckType check_type();
   inline void set_check_type(CheckType value);
 
-  // [type-recording unary op type]: For kind UNARY_OP_IC.
-  inline byte unary_op_type();
-  inline void set_unary_op_type(byte value);
-
   // [to_boolean_foo]: For kind TO_BOOLEAN_IC tells what state the stub is in.
   inline byte to_boolean_state();
 
@@ -5232,9 +5228,6 @@ class Code: public HeapObject {
   // KindSpecificFlags1 layout (STUB and OPTIMIZED_FUNCTION)
   static const int kStackSlotsFirstBit = 0;
   static const int kStackSlotsBitCount = 24;
-  static const int kUnaryOpTypeFirstBit =
-      kStackSlotsFirstBit + kStackSlotsBitCount;
-  static const int kUnaryOpTypeBitCount = 3;
   static const int kHasFunctionCacheFirstBit =
       kStackSlotsFirstBit + kStackSlotsBitCount;
   static const int kHasFunctionCacheBitCount = 1;
@@ -5243,15 +5236,12 @@ class Code: public HeapObject {
   static const int kMarkedForDeoptimizationBitCount = 1;
 
   STATIC_ASSERT(kStackSlotsFirstBit + kStackSlotsBitCount <= 32);
-  STATIC_ASSERT(kUnaryOpTypeFirstBit + kUnaryOpTypeBitCount <= 32);
   STATIC_ASSERT(kHasFunctionCacheFirstBit + kHasFunctionCacheBitCount <= 32);
   STATIC_ASSERT(kMarkedForDeoptimizationFirstBit +
                 kMarkedForDeoptimizationBitCount <= 32);
 
   class StackSlotsField: public BitField<int,
       kStackSlotsFirstBit, kStackSlotsBitCount> {};  // NOLINT
-  class UnaryOpTypeField: public BitField<int,
-      kUnaryOpTypeFirstBit, kUnaryOpTypeBitCount> {};  // NOLINT
   class HasFunctionCacheField: public BitField<bool,
       kHasFunctionCacheFirstBit, kHasFunctionCacheBitCount> {};  // NOLINT
   class MarkedForDeoptimizationField: public BitField<bool,