X64 Crankshaft: Add TypeRecordingBinaryStub to X64

src/type-info.h

Index: src/type-info.h
===================================================================
--- src/type-info.h	(revision 6575)
+++ src/type-info.h	(working copy)
@@ -120,9 +120,9 @@
   }
 
 
-  // Integer32 is an integer that can be represented as either a signed
-  // 32-bit integer or as an unsigned 32-bit integer. It has to be
-  // in the range [-2^31, 2^32 - 1]. We also have to check for negative 0
+  // Integer32 is an integer that can be represented as a signed
+  // 32-bit integer. It has to be
+  // in the range [-2^31, 2^31 - 1]. We also have to check for negative 0
   // as it is not an Integer32.
   static inline bool IsInt32Double(double value) {
     const DoubleRepresentation minus_zero(-0.0);
@@ -135,6 +135,19 @@
     return false;
   }
 
+  static inline bool IsSmiDouble(double value) {
+    const DoubleRepresentation minus_zero(-0.0);
+    DoubleRepresentation rep(value);
+    if (rep.bits == minus_zero.bits) return false;
+    if (value >= Smi::kMinValue && value <= Smi::kMaxValue &&
+        value == static_cast<int32_t>(value)) {
+      return true;
+    }
+    return false;
+  }
+
+
+
   static TypeInfo TypeFromValue(Handle<Object> value);
 
   bool Equals(const TypeInfo& other) {