[turbofan] Also optimize unsigned division by constant.

src/compiler/typer.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/bootstrapper.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/node-properties.h"
@@ skipping 1588 matching lines @@
   return Bounds(Type::Internal());
 }
 
 
 Bounds Typer::Visitor::TypeInt32Mul(Node* node) {
   return Bounds(Type::Integral32());
 }
 
 
 Bounds Typer::Visitor::TypeInt32MulHigh(Node* node) {
-  return Bounds(Type::Integral32());
+  return Bounds(Type::Signed32());
 }
 
 
 Bounds Typer::Visitor::TypeInt32Div(Node* node) {
   return Bounds(Type::Integral32());
 }
 
 
 Bounds Typer::Visitor::TypeInt32Mod(Node* node) {
   return Bounds(Type::Integral32());
@@ skipping 23 matching lines @@
 Bounds Typer::Visitor::TypeUint32LessThanOrEqual(Node* node) {
   return Bounds(Type::Boolean());
 }
 
 
 Bounds Typer::Visitor::TypeUint32Mod(Node* node) {
   return Bounds(Type::Unsigned32());
 }
 
 
+Bounds Typer::Visitor::TypeUint32MulHigh(Node* node) {
+  return Bounds(Type::Unsigned32());
+}
+
+
 Bounds Typer::Visitor::TypeInt64Add(Node* node) {
   return Bounds(Type::Internal());
 }
 
 
 Bounds Typer::Visitor::TypeInt64Sub(Node* node) {
   return Bounds(Type::Internal());
 }
 
 
@@ skipping 245 matching lines @@
         return typer_->float64_array_fun_;
       }
     }
   }
   return Type::Constant(value, zone());
 }
 
 }
 }
 }  // namespace v8::internal::compiler