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

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index 3bfe0ee078399f7e068eb7f509350b37bff25716..a4da3ed68b4eef034f6c7f0ce4a5aadeb5321d44 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -3176,73 +3176,6 @@ void MacroAssembler::AllocateJSValue(Register result, Register constructor,
   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) {