Merged: [turbofan] Fix typed lowering of JSToLength.

src/compiler/js-typed-lowering.cc

 // Copyright 2014 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/js-typed-lowering.h"
 
 #include "src/builtins/builtins-utils.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
@@ skipping 941 matching lines @@
 Reduction JSTypedLowering::ReduceJSToLength(Node* node) {
   Node* input = NodeProperties::GetValueInput(node, 0);
   Type* input_type = NodeProperties::GetType(input);
   if (input_type->Is(type_cache_.kIntegerOrMinusZero)) {
     if (input_type->Max() <= 0.0) {
       input = jsgraph()->ZeroConstant();
     } else if (input_type->Min() >= kMaxSafeInteger) {
       input = jsgraph()->Constant(kMaxSafeInteger);
     } else {
       if (input_type->Min() <= 0.0) {
-        input = graph()->NewNode(
-            common()->Select(MachineRepresentation::kTagged),
-            graph()->NewNode(simplified()->NumberLessThanOrEqual(), input,
-                             jsgraph()->ZeroConstant()),
-            jsgraph()->ZeroConstant(), input);
-        input_type = Type::Range(0.0, input_type->Max(), graph()->zone());
-        NodeProperties::SetType(input, input_type);
+        input = graph()->NewNode(simplified()->NumberMax(),
+                                 jsgraph()->ZeroConstant(), input);
       }
       if (input_type->Max() > kMaxSafeInteger) {
-        input = graph()->NewNode(
-            common()->Select(MachineRepresentation::kTagged),
-            graph()->NewNode(simplified()->NumberLessThanOrEqual(),
-                             jsgraph()->Constant(kMaxSafeInteger), input),
-            jsgraph()->Constant(kMaxSafeInteger), input);
-        input_type =
-            Type::Range(input_type->Min(), kMaxSafeInteger, graph()->zone());
-        NodeProperties::SetType(input, input_type);
+        input = graph()->NewNode(simplified()->NumberMin(),
+                                 jsgraph()->Constant(kMaxSafeInteger), input);
       }
     }
     ReplaceWithValue(node, input);
     return Replace(input);
   }
   return NoChange();
 }
 
 Reduction JSTypedLowering::ReduceJSToNumberInput(Node* input) {
   // Try constant-folding of JSToNumber with constant inputs.
@@ skipping 1159 matching lines @@
 }
 
 
 CompilationDependencies* JSTypedLowering::dependencies() const {
   return dependencies_;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8