------- Comment #3 from vmakarov at redhat dot com 2009-04-22 20:37 ------- Actually YARA did not have a rematerialization as IRA. Reload has a primitive rematerialization of constant values.
Although about 5 years I did implemented a register pressure relief through rematerialization which is close to Simpson's thesis. It was reported on the 2nd GCC summit. I had a mixed feeling about this: wrong register pressure calculation (because we have not cover classes at that time), small improvement but a few additional percents to compilation time. Probably it is time to return to this and make it optional or default which will eat a chunk of your recent 5% compilation time improvement :) I'll try to include this in my plans. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39839
