Optimize double.floor and double.ceil down to roundsd when SSE4.1 is available.

runtime/vm/flow_graph_optimizer.cc

Index: runtime/vm/flow_graph_optimizer.cc
diff --git a/runtime/vm/flow_graph_optimizer.cc b/runtime/vm/flow_graph_optimizer.cc
index 5999f513c70d440e193f880a01e9aeb37f5388a1..d18b2a1f236b825d85ee0619dd365388ca6baf55 100644
--- a/runtime/vm/flow_graph_optimizer.cc
+++ b/runtime/vm/flow_graph_optimizer.cc
@@ -1339,7 +1339,9 @@ bool FlowGraphOptimizer::TryInlineInstanceMethod(InstanceCallInstr* call) {
       return true;
     }
     if ((recognized_kind == MethodRecognizer::kDoubleTruncate) ||
-        (recognized_kind == MethodRecognizer::kDoubleRound)) {
+        (recognized_kind == MethodRecognizer::kDoubleRound) ||
+        (recognized_kind == MethodRecognizer::kDoubleFloor) ||
+        (recognized_kind == MethodRecognizer::kDoubleCeil)) {
       if (!CPUFeatures::double_truncate_round_supported()) {
         return false;
       }