[Bug tree-optimization/64434] [5 Regression] Performance regression after operand canonicalization (r216728).

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64434

--- Comment #13 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 13 Jan 2015, jakub at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64434
> 
> Jakub Jelinek <jakub at gcc dot gnu.org> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |jakub at gcc dot gnu.org
> 
> --- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Shouldn't you cache the result of count_num_stmt in some SSA_NAME_VERSION
> indexed vector?  Otherwise it can be expensive on pathological testcases.
> And with the caching I'd hope it should be cheap enough that you could do that
> even outside of loops.

Yes, see my patch review