[PATCH][C++] Save memory/time when folding CONSTRUCTORs

[Nathan Sidwell]

On 02/01/2017 10:18 AM, Richard Biener wrote:

> True.  Updated patch below.
>
> Richard.
>
> 2017-02-01  Richard Biener  <rguenther@suse.de>
>
> 	PR cp/14179
> 	cp/
> 	* cp-gimplify.c (cp_fold): When folding a CONSTRUCTOR copy
> 	it lazily on the first changed element only and copy it
> 	fully upfront, only storing changed elements.

Looks good, with the tweak Jakub noticed.

nathan

-- 
Nathan Sidwell