RFA: PATCH to store_field for storing a CONSTRUCTOR into a base subobject

[Jeff Law]

On 10/07/2015 08:42 PM, Jason Merrill wrote:
> While looking at another issue I noticed that in g++.dg/init/vbase1.C
> the Diamond(int) constructor was unnecessarily storing a CONSTRUCTOR
> into a stack temporary and then copying it into the SubB base subobject
> rather than directly storing the CONSTRUCTOR.  It was doing this because
> the base subobject is smaller than a complete object of SubB, but we
> already know how to store a CONSTRUCTOR into a space smaller than it
> would normally take without needing to introduce an extra temporary.
> This patch fixes that.
>
> Tested x86_64-pc-linux-gnu.  OK for trunk?
OK.
jeff