Revert 21774: "Generate KeyedLoadGeneric with Hydrogen"

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c1ba60e972ab35b3c6b72e783a04cf91d099e8c3..2ed61579ab0d4820da15db836edc7259e0bc2c72 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6723,18 +6723,10 @@ class Map: public HeapObject {
   static const int kVisitorIdOffset = kInstanceSizesOffset + kVisitorIdByte;
 
   // Byte offsets within kInstanceAttributesOffset attributes.
-#if V8_TARGET_LITTLE_ENDIAN
-  // Order instance type and bit field together such that they can be loaded
-  // together as a 16-bit word with instance type in the lower 8 bits regardless
-  // of endianess.
   static const int kInstanceTypeOffset = kInstanceAttributesOffset + 0;
-  static const int kBitFieldOffset = kInstanceAttributesOffset + 1;
-#else
-  static const int kBitFieldOffset = kInstanceAttributesOffset + 0;
-  static const int kInstanceTypeOffset = kInstanceAttributesOffset + 1;
-#endif
-  static const int kBitField2Offset = kInstanceAttributesOffset + 2;
-  static const int kUnusedPropertyFieldsOffset = kInstanceAttributesOffset + 3;
+  static const int kUnusedPropertyFieldsOffset = kInstanceAttributesOffset + 1;
+  static const int kBitFieldOffset = kInstanceAttributesOffset + 2;
+  static const int kBitField2Offset = kInstanceAttributesOffset + 3;
 
   STATIC_ASSERT(kInstanceTypeOffset == Internals::kMapInstanceTypeOffset);
 
@@ -9056,33 +9048,6 @@ class String: public Name {
  public:
   enum Encoding { ONE_BYTE_ENCODING, TWO_BYTE_ENCODING };
 
-  // Array index strings this short can keep their index in the hash field.
-  static const int kMaxCachedArrayIndexLength = 7;
-
-  // For strings which are array indexes the hash value has the string length
-  // mixed into the hash, mainly to avoid a hash value of zero which would be
-  // the case for the string '0'. 24 bits are used for the array index value.
-  static const int kArrayIndexValueBits = 24;
-  static const int kArrayIndexLengthBits =
-      kBitsPerInt - kArrayIndexValueBits - kNofHashBitFields;
-
-  STATIC_ASSERT((kArrayIndexLengthBits > 0));
-
-  class ArrayIndexValueBits : public BitField<unsigned int, kNofHashBitFields,
-      kArrayIndexValueBits> {};  // NOLINT
-  class ArrayIndexLengthBits : public BitField<unsigned int,
-      kNofHashBitFields + kArrayIndexValueBits,
-      kArrayIndexLengthBits> {};  // NOLINT
-
-  // Check that kMaxCachedArrayIndexLength + 1 is a power of two so we
-  // could use a mask to test if the length of string is less than or equal to
-  // kMaxCachedArrayIndexLength.
-  STATIC_ASSERT(IS_POWER_OF_TWO(kMaxCachedArrayIndexLength + 1));
-
-  static const unsigned int kContainsCachedArrayIndexMask =
-      (~kMaxCachedArrayIndexLength << ArrayIndexLengthBits::kShift) |
-      kIsNotArrayIndexMask;
-
   // Representation of the flat content of a String.
   // A non-flat string doesn't have flat content.
   // A flat string has content that's encoded as a sequence of either