Revert "Add new HSeqStringGetChar instruction."

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 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 1930 matching lines @@
   if (encoding == String::ONE_BYTE_ENCODING) {
     __ add(scratch, string, Operand(ToRegister(index)));
   } else {
     STATIC_ASSERT(kUC16Size == 2);
     __ add(scratch, string, Operand(ToRegister(index), LSL, 1));
   }
   return FieldMemOperand(scratch, SeqString::kHeaderSize);
 }
 
 
-void LCodeGen::DoSeqStringGetChar(LSeqStringGetChar* instr) {
-  String::Encoding encoding = instr->hydrogen()->encoding();
-  Register string = ToRegister(instr->string());
-  Register result = ToRegister(instr->result());
-
-  if (FLAG_debug_code) {
-    Register scratch = scratch0();
-    __ ldr(scratch, FieldMemOperand(string, HeapObject::kMapOffset));
-    __ ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
-
-    __ and_(scratch, scratch,
-            Operand(kStringRepresentationMask | kStringEncodingMask));
-    static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
-    static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
-    __ cmp(scratch, Operand(encoding == String::ONE_BYTE_ENCODING
-                            ? one_byte_seq_type : two_byte_seq_type));
-    __ Check(eq, kUnexpectedStringType);
-  }
-
-  MemOperand operand = BuildSeqStringOperand(string, instr->index(), encoding);
-  if (encoding == String::ONE_BYTE_ENCODING) {
-    __ ldrb(result, operand);
-  } else {
-    __ ldrh(result, operand);
-  }
-}
-
-
 void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
   String::Encoding encoding = instr->hydrogen()->encoding();
   Register string = ToRegister(instr->string());
   Register value = ToRegister(instr->value());
 
   if (FLAG_debug_code) {
     Register scratch = scratch0();
     __ ldr(scratch, FieldMemOperand(string, HeapObject::kMapOffset));
     __ ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset));
 
@@ skipping 3875 matching lines @@
   __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal