[wasm] Add ProtectedStore instruction

src/compiler/arm/instruction-selector-arm.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 "src/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 483 matching lines @@
     }
 
     InstructionOperand inputs[4];
     size_t input_count = 0;
     inputs[input_count++] = g.UseRegister(value);
     inputs[input_count++] = g.UseRegister(base);
     EmitStore(this, opcode, input_count, inputs, index);
   }
 }
 
+void InstructionSelector::VisitProtectedStore(Node* node) {
+  // TODO(eholk)
+  UNIMPLEMENTED();
+}
+
 void InstructionSelector::VisitUnalignedLoad(Node* node) {
   UnalignedLoadRepresentation load_rep =
       UnalignedLoadRepresentationOf(node->op());
   ArmOperandGenerator g(this);
   Node* base = node->InputAt(0);
   Node* index = node->InputAt(1);
 
   InstructionCode opcode = kArmLdr;
   // Only floating point loads need to be specially handled; integer loads
   // support unaligned access. We support unaligned FP loads by loading to
@@ skipping 1768 matching lines @@
   Vector<MachineType> req_aligned = Vector<MachineType>::New(2);
   req_aligned[0] = MachineType::Float32();
   req_aligned[1] = MachineType::Float64();
   return MachineOperatorBuilder::AlignmentRequirements::
       SomeUnalignedAccessUnsupported(req_aligned, req_aligned);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8