[generators] Create the fixed array holding the registers only once.

src/code-stub-assembler.h

 // Copyright 2016 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.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include "src/compiler/code-assembler.h"
 #include "src/objects.h"
 
@@ skipping 20 matching lines @@
   // Create with JSCall linkage.
   CodeStubAssembler(Isolate* isolate, Zone* zone, int parameter_count,
                     Code::Flags flags, const char* name);
 
   compiler::Node* BooleanMapConstant();
   compiler::Node* EmptyStringConstant();
   compiler::Node* HeapNumberMapConstant();
   compiler::Node* NoContextConstant();
   compiler::Node* NullConstant();
   compiler::Node* UndefinedConstant();
+  compiler::Node* StaleRegisterConstant();
 
   // Float64 operations.
   compiler::Node* Float64Ceil(compiler::Node* x);
   compiler::Node* Float64Floor(compiler::Node* x);
   compiler::Node* Float64Round(compiler::Node* x);
   compiler::Node* Float64Trunc(compiler::Node* x);
 
   // Tag a Word as a Smi value.
   compiler::Node* SmiTag(compiler::Node* value);
   // Untag a Smi value as a Word.
@@ skipping 156 matching lines @@
   compiler::Node* AllocateRawUnaligned(compiler::Node* size_in_bytes,
                                        AllocationFlags flags,
                                        compiler::Node* top_adddress,
                                        compiler::Node* limit_address);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUB_ASSEMBLER_H_