[turbofan] Introduce PretenureFlagOf helper function.

src/compiler/memory-optimizer.cc

 // Copyright 2016 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/memory-optimizer.h"
 
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
@@ skipping 89 matching lines @@
   }
   DCHECK_EQ(0, node->op()->EffectOutputCount());
 }
 
 void MemoryOptimizer::VisitAllocate(Node* node, AllocationState const* state) {
   DCHECK_EQ(IrOpcode::kAllocate, node->opcode());
   Node* value;
   Node* size = node->InputAt(0);
   Node* effect = node->InputAt(1);
   Node* control = node->InputAt(2);
-  PretenureFlag pretenure = OpParameter<PretenureFlag>(node->op());
+  PretenureFlag pretenure = PretenureFlagOf(node->op());
 
   // Propagate tenuring from outer allocations to inner allocations, i.e.
   // when we allocate an object in old space and store a newly allocated
   // child object into the pretenured object, then the newly allocated
   // child object also should get pretenured to old space.
   if (pretenure == TENURED) {
     for (Edge const edge : node->use_edges()) {
       Node* const user = edge.from();
       if (user->opcode() == IrOpcode::kStoreField && edge.index() == 0) {
         Node* const child = user->InputAt(1);
         if (child->opcode() == IrOpcode::kAllocate &&
-            OpParameter<PretenureFlag>(child) == NOT_TENURED) {
+            PretenureFlagOf(child->op()) == NOT_TENURED) {
           NodeProperties::ChangeOp(child, node->op());
           break;
         }
       }
     }
   } else {
     DCHECK_EQ(NOT_TENURED, pretenure);
     for (Edge const edge : node->use_edges()) {
       Node* const user = edge.from();
       if (user->opcode() == IrOpcode::kStoreField && edge.index() == 1) {
         Node* const parent = user->InputAt(0);
         if (parent->opcode() == IrOpcode::kAllocate &&
-            OpParameter<PretenureFlag>(parent) == TENURED) {
+            PretenureFlagOf(parent->op()) == TENURED) {
           pretenure = TENURED;
           break;
         }
       }
     }
   }
 
   // Determine the top/limit addresses.
   Node* top_address = jsgraph()->ExternalConstant(
       pretenure == NOT_TENURED
@@ skipping 380 matching lines @@
   return jsgraph()->common();
 }
 
 MachineOperatorBuilder* MemoryOptimizer::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8