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

src/code-stub-assembler.cc

 // 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.
 
 #include "src/code-stub-assembler.h"
 #include "src/code-factory.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 28 matching lines @@
 }
 
 Node* CodeStubAssembler::NullConstant() {
   return LoadRoot(Heap::kNullValueRootIndex);
 }
 
 Node* CodeStubAssembler::UndefinedConstant() {
   return LoadRoot(Heap::kUndefinedValueRootIndex);
 }
 
+Node* CodeStubAssembler::StaleRegisterConstant() {
+  return LoadRoot(Heap::kStaleRegisterRootIndex);
+}
+
 Node* CodeStubAssembler::Float64Round(Node* x) {
   Node* one = Float64Constant(1.0);
   Node* one_half = Float64Constant(0.5);
 
   Variable var_x(this, MachineRepresentation::kFloat64);
   Label return_x(this);
 
   // Round up {x} towards Infinity.
   var_x.Bind(Float64Ceil(x));
 
@@ skipping 1076 matching lines @@
 }
 
 Node* CodeStubAssembler::BitFieldDecode(Node* word32, uint32_t shift,
                                         uint32_t mask) {
   return Word32Shr(Word32And(word32, Int32Constant(mask)),
                    Int32Constant(shift));
 }
 
 }  // namespace internal
 }  // namespace v8