Tremendous increase in compile times for 3.4.1 with -mcpu=G5

[Bradley Lucier]

On Tuesday, August 10, 2004, at 10:52  PM, Dale Johannesen wrote:

> I suppose, but it's not obvious why that would cause local_alloc to do 
> that
> much more work.  Could we be tickling a bad algorithm in local-alloc?

There's more discussion in the PR,

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16975

It appears that the main problem may be a slowdown in sbitmaps (used in 
invalid_mode_change_p) caused by using HOST_WIDE_INTs.  See also

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13987

Brad