[PR64164] drop copyrename, integrate into expand

[Richard Biener]

On Tue, Mar 31, 2015 at 8:55 AM, Steven Bosscher <stevenb.gcc@gmail.com> wrote:
> On Sat, Mar 28, 2015 at 8:21 PM, Alexandre Oliva wrote:
>> Regstrapped on x86_64-linux-gnu native and on i686-pc-linux-gnu native
>> on x86_64, so without lto plugin.  The only regression is in
>> gcc.dg/guality/pr54200.c, that explicitly disables VTA.
>
> What about memory footprint? IIRC this pass was in part introduced to
> reduce the number of VAR_DECLs.

That's no longer necessary as we now drop VAR_DECLs from non-user vars
completely at into-SSA time.  We have "anonymous" SSA names without
associated decls.

Richard.

> Ciao!
> Steven