RFR (XS): [MVT] Support Q-types in MHs.constant()

[Paul Sandoz]

Looks good.

Should the test assert on the type of the MH to check the return type is a Q type?

Paul.

> On 11 Jul 2017, at 10:43, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
> 
> http://cr.openjdk.java.net/~vlivanov/valhalla/8184184/webrev.00/
> 
> Support Q-types in MHs.constant().
> 
> Testing: jdk/test/valhalla/mvt/
> 
> Best regards,
> Vladimir Ivanov