[cleanup] Delete MacroAssembler::CopyBytes, it is dead code

src/arm/macro-assembler-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 3227 matching lines @@
   // Initialize the JSValue.
   LoadGlobalFunctionInitialMap(constructor, scratch1, scratch2);
   str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset));
   LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex);
   str(scratch1, FieldMemOperand(result, JSObject::kPropertiesOffset));
   str(scratch1, FieldMemOperand(result, JSObject::kElementsOffset));
   str(value, FieldMemOperand(result, JSValue::kValueOffset));
   STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
 }
 
-
-void MacroAssembler::CopyBytes(Register src,
-                               Register dst,
-                               Register length,
-                               Register scratch) {
-  Label align_loop_1, word_loop, byte_loop, byte_loop_1, done;
-
-  // Align src before copying in word size chunks.
-  cmp(length, Operand(kPointerSize));
-  b(le, &byte_loop);
-
-  bind(&align_loop_1);
-  tst(src, Operand(kPointerSize - 1));
-  b(eq, &word_loop);
-  ldrb(scratch, MemOperand(src, 1, PostIndex));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  sub(length, length, Operand(1), SetCC);
-  b(&align_loop_1);
-  // Copy bytes in word size chunks.
-  bind(&word_loop);
-  if (emit_debug_code()) {
-    tst(src, Operand(kPointerSize - 1));
-    Assert(eq, kExpectingAlignmentForCopyBytes);
-  }
-  cmp(length, Operand(kPointerSize));
-  b(lt, &byte_loop);
-  ldr(scratch, MemOperand(src, kPointerSize, PostIndex));
-  str(scratch, MemOperand(dst, kPointerSize, PostIndex));
-  sub(length, length, Operand(kPointerSize));
-  b(&word_loop);
-
-  // Copy the last bytes if any left.
-  bind(&byte_loop);
-  cmp(length, Operand::Zero());
-  b(eq, &done);
-  bind(&byte_loop_1);
-  ldrb(scratch, MemOperand(src, 1, PostIndex));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  sub(length, length, Operand(1), SetCC);
-  b(ne, &byte_loop_1);
-  bind(&done);
-}
-
-
 void MacroAssembler::InitializeFieldsWithFiller(Register current_address,
                                                 Register end_address,
                                                 Register filler) {
   Label loop, entry;
   b(&entry);
   bind(&loop);
   str(filler, MemOperand(current_address, kPointerSize, PostIndex));
   bind(&entry);
   cmp(current_address, end_address);
   b(lo, &loop);
@@ skipping 760 matching lines @@
     }
   }
   if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift));
   add(result, result, Operand(dividend, LSR, 31));
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM