Convert UnaryOpStub to a HydrogenCodeStub

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index f9c7832732f77ddf962e52280d98d0848481a5cb..94f136143f0cafc6dbc772f587e3fa40d07cb742 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -92,6 +92,7 @@ class LChunkBuilder;
   V(CheckHeapObject)                           \
   V(CheckInstanceType)                         \
   V(CheckMaps)                                 \
+  V(CheckSmi)                                  \
   V(CheckPrototypeMaps)                        \
   V(ClampToUint8)                              \
   V(ClassOfTestAndBranch)                      \
@@ -128,6 +129,7 @@ class LChunkBuilder;
   V(InvokeFunction)                            \
   V(IsConstructCallAndBranch)                  \
   V(IsObjectAndBranch)                         \
+  V(IsNumberAndBranch)                         \
   V(IsStringAndBranch)                         \
   V(IsSmiAndBranch)                            \
   V(IsUndetectableAndBranch)                   \
@@ -2934,6 +2936,49 @@ class HCheckInstanceType: public HUnaryOperation {
 };
 
 
+class HCheckSmi: public HUnaryOperation {
+ public:
+  explicit HCheckSmi(HValue* value) : HUnaryOperation(value) {
+    set_representation(Representation::Smi());
+    SetFlag(kUseGVN);
+  }
+
+  virtual Representation RequiredInputRepresentation(int index) {
+    return Representation::Tagged();
+  }
+
+  virtual HType CalculateInferredType();
+
+  virtual HValue* Canonicalize() {
+    HType value_type = value()->type();
+    if (value_type.IsSmi()) {
+      return NULL;
+    }
+    return this;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(CheckSmi)
+
+ protected:
+  virtual bool DataEquals(HValue* other) { return true; }
+};
+
+
+class HIsNumberAndBranch: public HUnaryControlInstruction {
+ public:
+  explicit HIsNumberAndBranch(HValue* value)
+    : HUnaryControlInstruction(value, NULL, NULL) {
+    SetFlag(kFlexibleRepresentation);
+  }
+
+  virtual Representation RequiredInputRepresentation(int index) {
+    return Representation::None();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(IsNumberAndBranch)
+};
+
+
 class HCheckHeapObject: public HUnaryOperation {
  public:
   explicit HCheckHeapObject(HValue* value) : HUnaryOperation(value) {