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Re: [PATCH] Teach VRP to derive ranges from SWITCH_EXPR (fix PR21258)
On Fri, 13 Apr 2007, Diego Novillo wrote:
> Richard Guenther wrote on 04/13/07 05:20:
>
> > No noticable slowdowns, I have applied the patch to mainline. A patch
> > for 14495 is in work.
>
> I forgot to ask, what was the net effect of the optimization in terms of
> code size or performance of generated code?
There are improvements for checking enabled gcc itself, there were no
significant changes for performance or code size in the C++ testcases.
So the patch seems to work where it was designed for (improve code
generated for gcc with checking enabled) and does not harm other parts.
I would expect that fixing PR30318 will give another boost on its effects.
Richard.
--
Richard Guenther <rguenther@suse.de>
Novell / SUSE Labs
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