Convert UnaryOpStub to a HydrogenCodeStub

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 5b15cec09f11f2898bcfb6e30ac237b14a4f11b4..d5220bbfa571f522b103410b367a3352efc3a102 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1945,6 +1945,18 @@ LInstruction* LChunkBuilder::DoCheckNonSmi(HCheckNonSmi* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
+  LOperand* value = UseAtStart(instr->value());
+  return AssignEnvironment(new(zone()) LCheckSmi(value));
+}
+
+
+LInstruction* LChunkBuilder::DoIsNumberAndBranch(HIsNumberAndBranch* instr) {
+  return new(zone()) LIsNumberAndBranch(
+      UseRegisterOrConstantAtStart(instr->value()));
+}
+
+
 LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
   LCheckInstanceType* result = new(zone()) LCheckInstanceType(value);