[turbofan] Assign appropriate types to some Date builtins.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 3c5533c564298fb3e5b9b02f25e61fc55653ef63..543a40a47f604b89dd0e5ad6a710a5873c4b01cc 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1335,6 +1335,27 @@ Type* Typer::Visitor::JSCallFunctionTyper(Type* fun, Typer* t) {
           return Type::Signed32();
         case kMathClz32:
           return t->cache_.kZeroToThirtyTwo;
+        // Date functions.
+        case kDateGetFullYear:
+          return Type::Union(Type::Range(-271821.0, 275760.0, t->zone()),
+                             Type::NaN(), t->zone());
+        case kDateGetDate:
+          return Type::Union(Type::Range(1.0, 31.0, t->zone()), Type::NaN(),
+                             t->zone());
+        case kDateGetHours:
+          return Type::Union(Type::Range(0.0, 23.0, t->zone()), Type::NaN(),
+                             t->zone());
+        case kDateGetMilliseconds:
+          return Type::Union(Type::Range(0.0, 59.0, t->zone()), Type::NaN(),
+                             t->zone());
+        case kDateGetMonth:
+          return Type::Union(Type::Range(0.0, 11.0, t->zone()), Type::NaN(),
+                             t->zone());
+        case kDateGetSeconds:
+          return Type::Union(Type::Range(0.0, 59.0, t->zone()), Type::NaN(),
+                             t->zone());
+        case kDateGetTime:
+          return t->cache_.kJSDateValueType;
         // Number functions.
         case kNumberParseInt:
           return t->cache_.kIntegerOrMinusZeroOrNaN;