[not for landing] Diff between a64 and r19234 for no-a64 files.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 8a2f4219c763e014b89720d2c72fe84da981028b..c168d12d083784bae611c265f19695adba7c26d4 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1582,6 +1582,7 @@ Isolate::Isolate()
   thread_manager_->isolate_ = this;
 
 #if V8_TARGET_ARCH_ARM && !defined(__arm__) || \
+    V8_TARGET_ARCH_A64 && !defined(__aarch64__) || \
     V8_TARGET_ARCH_MIPS && !defined(__mips__)
   simulator_initialized_ = false;
   simulator_i_cache_ = NULL;
@@ -1967,7 +1968,7 @@ bool Isolate::Init(Deserializer* des) {
 
   // Initialize other runtime facilities
 #if defined(USE_SIMULATOR)
-#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS
+#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_A64 || V8_TARGET_ARCH_MIPS
   Simulator::Initialize(this);
 #endif
 #endif