Use a different map to distinguish eval contexts

src/interpreter/interpreter.cc

 // Copyright 2015 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/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 2246 matching lines @@
 // Creates a new context with number of |slots| for the function closure.
 void Interpreter::DoCreateFunctionContext(InterpreterAssembler* assembler) {
   Node* closure = __ LoadRegister(Register::function_closure());
   Node* slots = __ BytecodeOperandUImm(0);
   Node* context = __ GetContext();
   __ SetAccumulator(
       FastNewFunctionContextStub::Generate(assembler, closure, slots, context));
   __ Dispatch();
 }
 
+// CreateEvalContext <slots>
+//
+// Creates a new context with number of |slots| for an eval closure.
+void Interpreter::DoCreateEvalContext(InterpreterAssembler* assembler) {
+  Node* closure = __ LoadRegister(Register::function_closure());
+  Node* slots = __ BytecodeOperandUImm(0);
+  Node* context = __ GetContext();
+  __ SetAccumulator(
+      FastNewEvalContextStub::Generate(assembler, closure, slots, context));
+  __ Dispatch();
+}
+
 // CreateWithContext <register> <scope_info_idx>
 //
 // Creates a new context with the ScopeInfo at |scope_info_idx| for a
 // with-statement with the object in |register| and the closure in the
 // accumulator.
 void Interpreter::DoCreateWithContext(InterpreterAssembler* assembler) {
   Node* reg_index = __ BytecodeOperandReg(0);
   Node* object = __ LoadRegister(reg_index);
   Node* scope_info_idx = __ BytecodeOperandIdx(1);
   Node* scope_info = __ LoadConstantPoolEntry(scope_info_idx);
@@ skipping 406 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8