[Interpreter] Implement ForInStep directly.

src/compiler/code-stub-assembler.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/compiler/code-stub-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 54 matching lines @@
 
 Node* CodeStubAssembler::IntPtrConstant(intptr_t value) {
   return raw_assembler_->IntPtrConstant(value);
 }
 
 
 Node* CodeStubAssembler::NumberConstant(double value) {
   return raw_assembler_->NumberConstant(value);
 }
 
+Node* CodeStubAssembler::SmiConstant(Smi* value) {
+  return IntPtrConstant(bit_cast<intptr_t>(value));
+}
 
 Node* CodeStubAssembler::HeapConstant(Handle<HeapObject> object) {
   return raw_assembler_->HeapConstant(object);
 }
 
 
 Node* CodeStubAssembler::BooleanConstant(bool value) {
   return raw_assembler_->BooleanConstant(value);
 }
 
@@ skipping 33 matching lines @@
 
 Node* CodeStubAssembler::SmiTag(Node* value) {
   return raw_assembler_->WordShl(value, SmiShiftBitsConstant());
 }
 
 
 Node* CodeStubAssembler::SmiUntag(Node* value) {
   return raw_assembler_->WordSar(value, SmiShiftBitsConstant());
 }
 
+Node* CodeStubAssembler::SmiAdd(Node* a, Node* b) { return IntPtrAdd(a, b); }
+
 #define DEFINE_CODE_STUB_ASSEMBER_BINARY_OP(name)   \
   Node* CodeStubAssembler::name(Node* a, Node* b) { \
     return raw_assembler_->name(a, b);              \
   }
 CODE_STUB_ASSEMBLER_BINARY_OP_LIST(DEFINE_CODE_STUB_ASSEMBER_BINARY_OP)
 #undef DEFINE_CODE_STUB_ASSEMBER_BINARY_OP
 
 Node* CodeStubAssembler::ChangeInt32ToInt64(Node* value) {
   return raw_assembler_->ChangeInt32ToInt64(value);
 }
@@ skipping 468 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8