Re: [patch] tree-ssa-dom.c: Speed up tree_ssa_dominator_optimize.

[Mark Mitchell <mark at codesourcery dot com>]

Kazu Hirata wrote:
> Hi,
>
> Attached is a patch to speed up tree_ssa_dominator_optimize by
> removing a call to mark_dfs_back_edges.
>
> Jeff removed all uses of EDGE_DFS_BACK in tree-ssa-dom.c, so we don't
> need to call mark_dfs_back_edges.
>
> Tested on i686-pc-linux-gnu.  OK to apply?

This series of patches looks plausible, though I'll leave them to others 
to approve.  However, you could make this kind of patch more attractive 
if you would indicate what kind of improvement you've seen when 
compiling a benchmark of your choice.  If the improvement is truly tiny, 
then it may not be worth (a) taking the risk of changing the code, even 
in an obvious way, and (b) taking up the time of approvers to review the 
patch.  On the other hand, if the improvements are significant, you'll 
attract more interest from reviewers.

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