[turbofan] Add --csa-verify flag that enables machine graph verification of code stubs.

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"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 2934 matching lines @@
 
 Node* CodeStubAssembler::IsFixedDoubleArray(Node* object) {
   return WordEqual(LoadMap(object), FixedDoubleArrayMapConstant());
 }
 
 Node* CodeStubAssembler::IsHashTable(Node* object) {
   return WordEqual(LoadMap(object), LoadRoot(Heap::kHashTableMapRootIndex));
 }
 
 Node* CodeStubAssembler::IsDictionary(Node* object) {
-  return WordOr(IsHashTable(object), IsUnseededNumberDictionary(object));
+  return Word32Or(IsHashTable(object), IsUnseededNumberDictionary(object));
 }
 
 Node* CodeStubAssembler::IsUnseededNumberDictionary(Node* object) {
   return WordEqual(LoadMap(object),
                    LoadRoot(Heap::kUnseededNumberDictionaryMapRootIndex));
 }
 
 Node* CodeStubAssembler::StringCharCodeAt(Node* string, Node* index) {
   CSA_ASSERT(this, IsString(string));
   // Translate the {index} into a Word.
@@ skipping 5256 matching lines @@
 
 Node* CodeStubAssembler::IsDebugActive() {
   Node* is_debug_active = Load(
       MachineType::Uint8(),
       ExternalConstant(ExternalReference::debug_is_active_address(isolate())));
   return WordNotEqual(is_debug_active, Int32Constant(0));
 }
 
 }  // namespace internal
 }  // namespace v8