Re: A recent patch increased GCC's memory consumption!

[Jan Hubicka <jh at suse dot cz>]

> On Sat, 16 Jul 2005, Jan Hubicka wrote:
> 
> > Joseph,
> > any idea why the patch increased memory by up to 18%?
> 
> It should if anything have reduced memory consumption by causing fewer 
> types to be allocated - you'll need to give more details of what sort of 
> objects there are more of being allocated and where they are being 
> allocated.
> 
> One possibility might be that the optimizers are working better now they 
> have fewer integer types with the same width, and this causes them to 
> allocate more memory - but if so, the places where the optimizers care 
> about which of multiple types with the same width is being used would be 
> worth tracking down, as this could also apply with e.g. int and long, not 
> just with bit-field types.

I am attaching logs from today and yesterday.  Looks like tree
optimizers are actually working worse, at least more RTL instructions
are produced so about every pass consume more memory.

Honza

> 
> -- 
> Joseph S. Myers               http://www.srcf.ucam.org/~jsm28/gcc/
>     jsm@polyomino.org.uk (personal mail)
>     joseph@codesourcery.com (CodeSourcery mail)
>     jsm28@gcc.gnu.org (Bugzilla assignments and CCs)

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