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

src/ppc/macro-assembler-ppc.cc

 // Copyright 2014 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 <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
@@ skipping 3158 matching lines @@
   // Initialize the JSValue.
   LoadGlobalFunctionInitialMap(constructor, scratch1, scratch2);
   StoreP(scratch1, FieldMemOperand(result, HeapObject::kMapOffset), r0);
   LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex);
   StoreP(scratch1, FieldMemOperand(result, JSObject::kPropertiesOffset), r0);
   StoreP(scratch1, FieldMemOperand(result, JSObject::kElementsOffset), r0);
   StoreP(value, FieldMemOperand(result, JSValue::kValueOffset), r0);
   STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
 }
 
-
-void MacroAssembler::CopyBytes(Register src, Register dst, Register length,
-                               Register scratch) {
-  Label align_loop, aligned, word_loop, byte_loop, byte_loop_1, done;
-
-  DCHECK(!scratch.is(r0));
-
-  cmpi(length, Operand::Zero());
-  beq(&done);
-
-  // Check src alignment and length to see whether word_loop is possible
-  andi(scratch, src, Operand(kPointerSize - 1));
-  beq(&aligned, cr0);
-  subfic(scratch, scratch, Operand(kPointerSize * 2));
-  cmp(length, scratch);
-  blt(&byte_loop);
-
-  // Align src before copying in word size chunks.
-  subi(scratch, scratch, Operand(kPointerSize));
-  mtctr(scratch);
-  bind(&align_loop);
-  lbz(scratch, MemOperand(src));
-  addi(src, src, Operand(1));
-  subi(length, length, Operand(1));
-  stb(scratch, MemOperand(dst));
-  addi(dst, dst, Operand(1));
-  bdnz(&align_loop);
-
-  bind(&aligned);
-
-  // Copy bytes in word size chunks.
-  if (emit_debug_code()) {
-    andi(r0, src, Operand(kPointerSize - 1));
-    Assert(eq, kExpectingAlignmentForCopyBytes, cr0);
-  }
-
-  ShiftRightImm(scratch, length, Operand(kPointerSizeLog2));
-  cmpi(scratch, Operand::Zero());
-  beq(&byte_loop);
-
-  mtctr(scratch);
-  bind(&word_loop);
-  LoadP(scratch, MemOperand(src));
-  addi(src, src, Operand(kPointerSize));
-  subi(length, length, Operand(kPointerSize));
-
-  StoreP(scratch, MemOperand(dst));
-  addi(dst, dst, Operand(kPointerSize));
-  bdnz(&word_loop);
-
-  // Copy the last bytes if any left.
-  cmpi(length, Operand::Zero());
-  beq(&done);
-
-  bind(&byte_loop);
-  mtctr(length);
-  bind(&byte_loop_1);
-  lbz(scratch, MemOperand(src));
-  addi(src, src, Operand(1));
-  stb(scratch, MemOperand(dst));
-  addi(dst, dst, Operand(1));
-  bdnz(&byte_loop_1);
-
-  bind(&done);
-}
-
-
 void MacroAssembler::InitializeNFieldsWithFiller(Register current_address,
                                                  Register count,
                                                  Register filler) {
   Label loop;
   mtctr(count);
   bind(&loop);
   StoreP(filler, MemOperand(current_address));
   addi(current_address, current_address, Operand(kPointerSize));
   bdnz(&loop);
 }
@@ skipping 1513 matching lines @@
   }
   if (mag.shift > 0) srawi(result, result, mag.shift);
   ExtractBit(r0, dividend, 31);
   add(result, result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC