Introduce bytecodes for assisting generator suspend and resume.

src/compiler/code-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-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 158 matching lines @@
   return raw_assembler_->TruncateFloat64ToInt32(TruncationMode::kJavaScript, a);
 }
 
 Node* CodeAssembler::ChangeUint32ToWord(Node* value) {
   if (raw_assembler_->machine()->Is64()) {
     value = raw_assembler_->ChangeUint32ToUint64(value);
   }
   return value;
 }
 
+Node* CodeAssembler::ChangeInt32ToIntPtr(Node* value) {
+  if (raw_assembler_->machine()->Is64()) {
+    value = raw_assembler_->ChangeInt32ToInt64(value);
+  }
+  return value;
+}
+
 #define DEFINE_CODE_ASSEMBLER_UNARY_OP(name) \
   Node* CodeAssembler::name(Node* a) { return raw_assembler_->name(a); }
 CODE_ASSEMBLER_UNARY_OP_LIST(DEFINE_CODE_ASSEMBLER_UNARY_OP)
 #undef DEFINE_CODE_ASSEMBLER_UNARY_OP
 
 Node* CodeAssembler::Load(MachineType rep, Node* base) {
   return raw_assembler_->Load(rep, base);
 }
 
 Node* CodeAssembler::Load(MachineType rep, Node* base, Node* index) {
@@ skipping 499 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8