Generation of our home-grown memmove doesn't depend on serializer state anymore.

src/arm/codegen-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 "v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "codegen.h"
 #include "macro-assembler.h"
@@ skipping 61 matching lines @@
 #if !defined(USE_SIMULATOR)
   return FUNCTION_CAST<UnaryMathFunction>(buffer);
 #else
   fast_exp_arm_machine_code = buffer;
   return &fast_exp_simulator;
 #endif
 }
 
 #if defined(V8_HOST_ARCH_ARM)
 OS::MemCopyUint8Function CreateMemCopyUint8Function(
-    bool serializer_enabled,
     OS::MemCopyUint8Function stub) {
 #if defined(USE_SIMULATOR)
   return stub;
 #else
-  if (serializer_enabled || !CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) {
-    return stub;
-  }
+  if (!CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) return stub;
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == NULL) return stub;
 
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
 
   Register dest = r0;
   Register src = r1;
   Register chars = r2;
   Register temp1 = r3;
@@ skipping 131 matching lines @@
 
   CPU::FlushICache(buffer, actual_size);
   OS::ProtectCode(buffer, actual_size);
   return FUNCTION_CAST<OS::MemCopyUint8Function>(buffer);
 #endif
 }
 
 
 // Convert 8 to 16. The number of character to copy must be at least 8.
 OS::MemCopyUint16Uint8Function CreateMemCopyUint16Uint8Function(
-    bool serializer_enabled,
     OS::MemCopyUint16Uint8Function stub) {
 #if defined(USE_SIMULATOR)
   return stub;
 #else
-  if (serializer_enabled || !CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) {
-    return stub;
-  }
+  if (!CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) return stub;
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
   if (buffer == NULL) return stub;
 
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
 
   Register dest = r0;
   Register src = r1;
   Register chars = r2;
   if (CpuFeatures::IsSupported(NEON)) {
@@ skipping 631 matching lines @@
     patcher.masm()->add(r0, pc, Operand(-8));
     patcher.masm()->ldr(pc, MemOperand(pc, -4));
     patcher.masm()->emit_code_stub_address(stub);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM