[turbofan] Added the optional Float64RoundTiesEven operator 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 51a58d518611c493724d69837be3c9581440e256..c16cd31c69c07b38ea42f90308bd8eeb839c7598 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -892,6 +892,8 @@ void InstructionSelector::VisitNode(Node* node) {
       return MarkAsFloat64(node), VisitFloat64RoundTruncate(node);
     case IrOpcode::kFloat64RoundTiesAway:
       return MarkAsFloat64(node), VisitFloat64RoundTiesAway(node);
+    case IrOpcode::kFloat64RoundTiesEven:
+      return MarkAsFloat64(node), VisitFloat64RoundTiesEven(node);
     case IrOpcode::kFloat64ExtractLowWord32:
       return MarkAsWord32(node), VisitFloat64ExtractLowWord32(node);
     case IrOpcode::kFloat64ExtractHighWord32: