[turbofan] Use range types to type and lower arithmetic ops.

test/cctest/types-fuzz.h

Index: test/cctest/types-fuzz.h
diff --git a/test/cctest/types-fuzz.h b/test/cctest/types-fuzz.h
index 23e33adbdab81b78d9859a5bd03a9d201ba9bef0..233249a4b924d223dc9f02f7a6fa868519dc457a 100644
--- a/test/cctest/types-fuzz.h
+++ b/test/cctest/types-fuzz.h
@@ -103,6 +103,9 @@ class Types {
       if (!IsMinusZero(x)) integers.push_back(isolate->factory()->NewNumber(x));
     }
 
+    Integer = Type::Range(isolate->factory()->NewNumber(-V8_INFINITY),
+                          isolate->factory()->NewNumber(+V8_INFINITY), region);
+
     NumberArray = Type::Array(Number, region);
     StringArray = Type::Array(String, region);
     AnyArray = Type::Array(Any, region);
@@ -145,6 +148,8 @@ class Types {
   TypeHandle ArrayConstant;
   TypeHandle UninitializedConstant;
 
+  TypeHandle Integer;
+
   TypeHandle NumberArray;
   TypeHandle StringArray;
   TypeHandle AnyArray;