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Re: Speedup into SSA (not committed) for PR 8361, PR 15855, PR13766

On Thu, 2004-12-09 at 18:06 -0500, Diego Novillo wrote:
> This patch adds a shortcut to avoid processing statements that don't 
> need renaming when the renamer is called multiple times.
> The compile time benefits of this patch are measurable, and in the 
> process it uncovered a couple of bugs in SRA and the vectorizer.  These 
> are the compile time speedups I got with this patch:
> 		Into SSA	Overall
> cc-i-files	  +18.3%	  +0.2%
> DLV (PR 8361)	  +15.9%	  +3.3%
> MICO (PR 13766)	  +21.9%	  +2.3%
> tramp3d (PR ?)	  +20.9%	  +7.8%
> PR 15855	  +26.0%	  +1.4%
> Mark, I'm deferring to you.  The patch is only a compile time 
> improvement and fixes no regressions.  If you prefer, I can hold on to 
> it until mainline is out of the regression-only state.
I'd say go for it.  It's clearly attacking compile-time regressions
and should not affect the generated code.  But if you'd prefer to wait
for Mark to chime in, then that's OK with me.


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