[turbofan] Next step towards shared operators.

src/compiler/graph-builder.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/compiler/graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/generic-graph.h"
 #include "src/compiler/generic-node.h"
 #include "src/compiler/generic-node-inl.h"
@@ skipping 10 matching lines @@
 
 StructuredGraphBuilder::StructuredGraphBuilder(Graph* graph,
                                                CommonOperatorBuilder* common)
     : GraphBuilder(graph),
       common_(common),
       environment_(NULL),
       current_context_(NULL),
       exit_control_(NULL) {}
 
 
-Node* StructuredGraphBuilder::MakeNode(Operator* op, int value_input_count,
+Node* StructuredGraphBuilder::MakeNode(const Operator* op,
+                                       int value_input_count,
                                        Node** value_inputs) {
   DCHECK(op->InputCount() == value_input_count);
 
   bool has_context = OperatorProperties::HasContextInput(op);
   bool has_framestate = OperatorProperties::HasFrameStateInput(op);
   bool has_control = OperatorProperties::GetControlInputCount(op) == 1;
   bool has_effect = OperatorProperties::GetEffectInputCount(op) == 1;
 
   DCHECK(OperatorProperties::GetControlInputCount(op) < 2);
   DCHECK(OperatorProperties::GetEffectInputCount(op) < 2);
@@ skipping 112 matching lines @@
   for (int i = 0; i < static_cast<int>(values()->size()); ++i) {
     Node* phi = builder_->NewPhi(1, values()->at(i), control);
     values()->at(i) = phi;
   }
   Node* effect = builder_->NewEffectPhi(1, GetEffectDependency(), control);
   UpdateEffectDependency(effect);
 }
 
 
 Node* StructuredGraphBuilder::NewPhi(int count, Node* input, Node* control) {
-  Operator* phi_op = common()->Phi(kMachAnyTagged, count);
+  const Operator* phi_op = common()->Phi(kMachAnyTagged, count);
   Node** buffer = zone()->NewArray<Node*>(count + 1);
   MemsetPointer(buffer, input, count);
   buffer[count] = control;
   return graph()->NewNode(phi_op, count + 1, buffer);
 }
 
 
 // TODO(mstarzinger): Revisit this once we have proper effect states.
 Node* StructuredGraphBuilder::NewEffectPhi(int count, Node* input,
                                            Node* control) {
-  Operator* phi_op = common()->EffectPhi(count);
+  const Operator* phi_op = common()->EffectPhi(count);
   Node** buffer = zone()->NewArray<Node*>(count + 1);
   MemsetPointer(buffer, input, count);
   buffer[count] = control;
   return graph()->NewNode(phi_op, count + 1, buffer);
 }
 
 
 Node* StructuredGraphBuilder::MergeControl(Node* control, Node* other) {
   int inputs = OperatorProperties::GetControlInputCount(control->op()) + 1;
   if (control->opcode() == IrOpcode::kLoop) {
     // Control node for loop exists, add input.
-    Operator* op = common()->Loop(inputs);
+    const Operator* op = common()->Loop(inputs);
     control->AppendInput(zone(), other);
     control->set_op(op);
   } else if (control->opcode() == IrOpcode::kMerge) {
     // Control node for merge exists, add input.
-    Operator* op = common()->Merge(inputs);
+    const Operator* op = common()->Merge(inputs);
     control->AppendInput(zone(), other);
     control->set_op(op);
   } else {
     // Control node is a singleton, introduce a merge.
-    Operator* op = common()->Merge(inputs);
+    const Operator* op = common()->Merge(inputs);
     control = graph()->NewNode(op, control, other);
   }
   return control;
 }
 
 
 Node* StructuredGraphBuilder::MergeEffect(Node* value, Node* other,
                                           Node* control) {
   int inputs = OperatorProperties::GetControlInputCount(control->op());
   if (value->opcode() == IrOpcode::kEffectPhi &&
@@ skipping 31 matching lines @@
   if (!dead_control_.is_set()) {
     Node* dead_node = graph()->NewNode(common_->Dead());
     dead_control_.set(dead_node);
     return dead_node;
   }
   return dead_control_.get();
 }
 }
 }
 }  // namespace v8::internal::compiler