Only reference constant root list entries in the snapshot.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 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 "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 1385 matching lines @@
 void MacroAssembler::LoadRoot(CPURegister destination,
                               Heap::RootListIndex index) {
   // TODO(jbramley): Most root values are constants, and can be synthesized
   // without a load. Refer to the ARM back end for details.
   Ldr(destination, MemOperand(root, index << kPointerSizeLog2));
 }
 
 
 void MacroAssembler::StoreRoot(Register source,
                                Heap::RootListIndex index) {
+  DCHECK(Heap::RootCanBeWrittenAfterInitialization(index));
   Str(source, MemOperand(root, index << kPointerSizeLog2));
 }
 
 
 void MacroAssembler::LoadTrueFalseRoots(Register true_root,
                                         Register false_root) {
   STATIC_ASSERT((Heap::kTrueValueRootIndex + 1) == Heap::kFalseValueRootIndex);
   Ldp(true_root, false_root,
       MemOperand(root, Heap::kTrueValueRootIndex << kPointerSizeLog2));
 }
@@ skipping 3749 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64