Reland "[turbofan] Reuse forward fixpoint algorithm in Typer by making it a Reducer."

src/compiler/node-properties-inl.h

 // Copyright 2013 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_COMPILER_NODE_PROPERTIES_INL_H_
 #define V8_COMPILER_NODE_PROPERTIES_INL_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/common-operator.h"
@@ skipping 183 matching lines @@
   Bounds bounds = node->bounds();
   DCHECK((bounds.lower == NULL) == (bounds.upper == NULL));
   return bounds.upper != NULL;
 }
 
 inline Bounds NodeProperties::GetBounds(Node* node) {
   DCHECK(IsTyped(node));
   return node->bounds();
 }
 
+inline void NodeProperties::RemoveBounds(Node* node) {
+  Bounds empty;
+  node->set_bounds(empty);
+}
+
 inline void NodeProperties::SetBounds(Node* node, Bounds b) {
   DCHECK(b.lower != NULL && b.upper != NULL);
   node->set_bounds(b);
 }
 
 inline bool NodeProperties::AllValueInputsAreTyped(Node* node) {
   int input_count = node->op()->ValueInputCount();
   for (int i = 0; i < input_count; ++i) {
     if (!IsTyped(GetValueInput(node, i))) return false;
   }
   return true;
 }
 
 
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_NODE_PROPERTIES_INL_H_