[turbofan] Rename "original constructor" to "new target".

src/compiler/ast-graph-builder.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/ast-graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/linkage.h"
@@ skipping 2485 matching lines @@
   const Operator* op = javascript()->CallRuntime(Runtime::kGetPrototype, 1);
   Node* super_function = NewNode(op, this_function);
   // TODO(mstarzinger): This probably needs a proper bailout id.
   PrepareFrameState(super_function, BailoutId::None());
   environment()->Push(super_function);
 
   // Evaluate all arguments to the super call.
   ZoneList<Expression*>* args = expr->arguments();
   VisitForValues(args);
 
-  // Original constructor is loaded from the {new.target} variable.
+  // The new target is loaded from the {new.target} variable.
   VisitForValue(super->new_target_var());
 
   // Create node to perform the super call.
   const Operator* call = javascript()->CallConstruct(args->length() + 2);
   Node* value = ProcessArguments(call, args->length() + 2);
   PrepareFrameState(value, expr->id(), ast_context()->GetStateCombine());
   ast_context()->ProduceValue(value);
 }
 
 
 void AstGraphBuilder::VisitCallNew(CallNew* expr) {
   VisitForValue(expr->expression());
 
   // Evaluate all arguments to the construct call.
   ZoneList<Expression*>* args = expr->arguments();
   VisitForValues(args);
 
-  // Original constructor is the same as the callee.
+  // The new target is the same as the callee.
   environment()->Push(environment()->Peek(args->length()));
 
   // Create node to perform the construct call.
   const Operator* call = javascript()->CallConstruct(args->length() + 2);
   Node* value = ProcessArguments(call, args->length() + 2);
   PrepareFrameState(value, expr->id(), ast_context()->GetStateCombine());
   ast_context()->ProduceValue(value);
 }
 
 
@@ skipping 669 matching lines @@
   FrameStateBeforeAndAfter states(this, BailoutId::None());
   BuildVariableAssignment(this_function_var, this_function, Token::INIT_CONST,
                           VectorSlotPair(), BailoutId::None(), states);
   return this_function;
 }
 
 
 Node* AstGraphBuilder::BuildNewTargetVariable(Variable* new_target_var) {
   if (new_target_var == nullptr) return nullptr;
 
-  // Retrieve the original constructor in case we are called as a constructor.
-  const Operator* op =
-      javascript()->CallRuntime(Runtime::kGetOriginalConstructor, 0);
+  // Retrieve the new target in case we are called as a constructor.
+  const Operator* op = javascript()->CallRuntime(Runtime::kGetNewTarget, 0);
   Node* object = NewNode(op);
   // TODO(4544): Bailout id only needed for JavaScriptFrame::Summarize.
   PrepareFrameState(object, BailoutId::FunctionContext());
 
   // Assign the object to the {new.target} variable. This should never lazy
   // deopt, so it is fine to send invalid bailout id.
   FrameStateBeforeAndAfter states(this, BailoutId::None());
   BuildVariableAssignment(new_target_var, object, Token::INIT_CONST,
                           VectorSlotPair(), BailoutId::None(), states);
   return object;
@@ skipping 1070 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8