Re: [4.0 PATCH] Enable Tree-SRA at -O3 only for Ada

[Mark Mitchell <mark at codesourcery dot com>]

Geert Bosch wrote:
> On Apr 5, 2005, at 17:26, Eric Botcazou wrote:
>
> > Given that I initially argued for that, I don't really disagree.  But 
> > GCC has
> > tons of optimization switches so the user would have to specifically know
> > -ftree-sra to enable it.  I therefore thought -O3 would be a good 
> > compromise.
>
>
> Yes, but as we know this optimization is broken now for Ada, simple
> use of -O3 shouldn't enable this. I just spoke with Richard Kenner
> and he agrees we should turn off tree-SRA for 4.0. If the remaining
> front end bugs get fixed in the 4.0.1 timeframe, we can always consider
> turning it back on.

The final decision is up to the Ada folks, but I'd suggest this 
optimization just be disabled for Ada, if it doesn't work.  I wouldn't 
turn it on at any optimization level.

--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304