[turbofan] Implemented the ChangeFloat64ToInt64 TurboFan operator.

src/compiler/arm64/instruction-selector-arm64.cc

Index: src/compiler/arm64/instruction-selector-arm64.cc
diff --git a/src/compiler/arm64/instruction-selector-arm64.cc b/src/compiler/arm64/instruction-selector-arm64.cc
index fe0f44218551f1954433151adcff4c011f936d0f..d657adb4fe1ff63386ffa08cf41d07d90a31f2a7 100644
--- a/src/compiler/arm64/instruction-selector-arm64.cc
+++ b/src/compiler/arm64/instruction-selector-arm64.cc
@@ -1237,6 +1237,11 @@ void InstructionSelector::VisitChangeFloat64ToUint32(Node* node) {
 }
 
 
+void InstructionSelector::VisitChangeFloat64ToInt64(Node* node) {
+  VisitRR(this, kArm64Float64ToInt64, node);
+}
+
+
 void InstructionSelector::VisitChangeInt32ToInt64(Node* node) {
   VisitRR(this, kArm64Sxtw, node);
 }