[Bug tree-optimization/27140] Compiling LLVM now takes nearly 5x as long with 4.1 as it did with 4.0

[dberlin at dberlin dot org]

------- Comment #7 from dberlin at gcc dot gnu dot org  2006-04-13 22:40 -------
Subject: Re:  Compiling LLVM now takes nearly 5x as long with 4.1 as it did
with 4.0


On Apr 13, 2006, at 1:30 PM, rspencer at x10sys dot com wrote:

>
>
> ------- Comment #6 from rspencer at x10sys dot com  2006-04-13  
> 20:30 -------
> Created an attachment (id=11261)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11261&action=view)
>  --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11261&action=view)
> Timing results with -fno-tree-salias
>
> Andrew Pinskia suggested that I try -fno-tree-salias. This decreased
> compilation time by about 10% (244 secs vs 265 secs).

Only by virtue of the fact that you have a smaller number of phi nodes.
It's not going to give an order of magnitude improvement here.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27140