Implement optional turbofan UnalignedLoad and UnalignedStore operators

src/compiler/instruction-selector.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/compiler/instruction-selector.h"
 
 #include <limits>
 
 #include "src/base/adapters.h"
 #include "src/compiler/instruction-selector-impl.h"
@@ skipping 687 matching lines @@
 
 
 void InstructionSelector::VisitBlock(BasicBlock* block) {
   DCHECK(!current_block_);
   current_block_ = block;
   int current_block_end = static_cast<int>(instructions_.size());
 
   int effect_level = 0;
   for (Node* const node : *block) {
     if (node->opcode() == IrOpcode::kStore ||
+        node->opcode() == IrOpcode::kUnalignedStore ||
         node->opcode() == IrOpcode::kCheckedStore ||
         node->opcode() == IrOpcode::kCall) {
       ++effect_level;
     }
     SetEffectLevel(node, effect_level);
   }
 
   // Generate code for the block control "top down", but schedule the code
   // "bottom up".
   VisitControl(block);
@@ skipping 417 matching lines @@
     case IrOpcode::kFloat64InsertHighWord32:
       return MarkAsFloat64(node), VisitFloat64InsertHighWord32(node);
     case IrOpcode::kStackSlot:
       return VisitStackSlot(node);
     case IrOpcode::kLoadStackPointer:
       return VisitLoadStackPointer(node);
     case IrOpcode::kLoadFramePointer:
       return VisitLoadFramePointer(node);
     case IrOpcode::kLoadParentFramePointer:
       return VisitLoadParentFramePointer(node);
+    case IrOpcode::kUnalignedLoad: {
+      UnalignedLoadRepresentation type =
+          UnalignedLoadRepresentationOf(node->op());
+      MarkAsRepresentation(type.representation(), node);
+      return VisitUnalignedLoad(node);
+    }
+    case IrOpcode::kUnalignedStore:
+      return VisitUnalignedStore(node);
     case IrOpcode::kCheckedLoad: {
       MachineRepresentation rep =
           CheckedLoadRepresentationOf(node->op()).representation();
       MarkAsRepresentation(rep, node);
       return VisitCheckedLoad(node);
     }
     case IrOpcode::kCheckedStore:
       return VisitCheckedStore(node);
     case IrOpcode::kInt32PairAdd:
       MarkAsWord32(NodeProperties::FindProjection(node, 0));
@@ skipping 630 matching lines @@
   return new (instruction_zone()) FrameStateDescriptor(
       instruction_zone(), state_info.type(), state_info.bailout_id(),
       state_info.state_combine(), parameters, locals, stack,
       state_info.shared_info(), outer_state);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8