[turbofan] Also optimize unsigned division by constant.

src/compiler/arm64/instruction-selector-arm64.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/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 760 matching lines @@
 void InstructionSelector::VisitInt32MulHigh(Node* node) {
   // TODO(arm64): Can we do better here?
   Arm64OperandGenerator g(this);
   InstructionOperand* const smull_operand = g.TempRegister();
   Emit(kArm64Smull, smull_operand, g.UseRegister(node->InputAt(0)),
        g.UseRegister(node->InputAt(1)));
   Emit(kArm64Asr, g.DefineAsRegister(node), smull_operand, g.TempImmediate(32));
 }
 
 
+void InstructionSelector::VisitUint32MulHigh(Node* node) {
+  // TODO(arm64): Can we do better here?
+  Arm64OperandGenerator g(this);
+  InstructionOperand* const smull_operand = g.TempRegister();
+  Emit(kArm64Umull, smull_operand, g.UseRegister(node->InputAt(0)),
+       g.UseRegister(node->InputAt(1)));
+  Emit(kArm64Lsr, g.DefineAsRegister(node), smull_operand, g.TempImmediate(32));
+}
+
+
 void InstructionSelector::VisitInt32Div(Node* node) {
   VisitRRR(this, kArm64Idiv32, node);
 }
 
 
 void InstructionSelector::VisitInt64Div(Node* node) {
   VisitRRR(this, kArm64Idiv, node);
 }
 
 
@@ skipping 553 matching lines @@
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::kFloat64Floor |
          MachineOperatorBuilder::kFloat64Ceil |
          MachineOperatorBuilder::kFloat64RoundTruncate |
          MachineOperatorBuilder::kFloat64RoundTiesAway;
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8