Add support for uint64 compares to TurboFan.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index e3e883dc4b28f2cbeabe953c7d12d6dc19ff2108..d3934b349e528b3edce2fa84ee184446922348c1 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -572,6 +572,8 @@ void InstructionSelector::VisitNode(Node* node) {
       return VisitInt64LessThan(node);
     case IrOpcode::kInt64LessThanOrEqual:
       return VisitInt64LessThanOrEqual(node);
+    case IrOpcode::kUint64LessThan:
+      return VisitUint64LessThan(node);
     case IrOpcode::kChangeFloat32ToFloat64:
       return MarkAsDouble(node), VisitChangeFloat32ToFloat64(node);
     case IrOpcode::kChangeInt32ToFloat64:
@@ -695,6 +697,12 @@ void InstructionSelector::VisitInt64LessThanOrEqual(Node* node) {
 }
 
 
+void InstructionSelector::VisitUint64LessThan(Node* node) {
+  FlagsContinuation cont(kUnsignedLessThan, node);
+  VisitWord64Compare(node, &cont);
+}
+
+
 void InstructionSelector::VisitTruncateFloat64ToInt32(Node* node) {
   OperandGenerator g(this);
   Emit(kArchTruncateDoubleToI, g.DefineAsRegister(node),
@@ -929,6 +937,9 @@ void InstructionSelector::VisitBranch(Node* branch, BasicBlock* tbranch,
       case IrOpcode::kInt64LessThanOrEqual:
         cont.OverwriteAndNegateIfEqual(kSignedLessThanOrEqual);
         return VisitWord64Compare(value, &cont);
+      case IrOpcode::kUint64LessThan:
+        cont.OverwriteAndNegateIfEqual(kUnsignedLessThan);
+        return VisitWord64Compare(value, &cont);
       case IrOpcode::kFloat64Equal:
         cont.OverwriteAndNegateIfEqual(kUnorderedEqual);
         return VisitFloat64Compare(value, &cont);