If it is possible, I would like to begin with a small project to get
familiar with GCC code. I have been through the "Simple GCC projects"
web page and I would be interested in project such as "Convert
reorg.c to use the flow graph".
Could someone help me to get involved ?
I cannot but reinforce Laurynas' hints. Unfortunately, you picked a
rather complicated project, and I'm surprised that it is listed under
"simple"! In fact, it would probably be as easy to rewrite reorg.c
completely; which is probably not the hardest GCC task on Earth, but not
simple either.
You can look also at http://gcc.gnu.org/wiki/Speedup_areas including
* Bitmaps, also called sparse bit sets, are implemented using a linked
list with a cache. This is probably not the most time-efficient
representation, and it is not unusual for bitmap functions to show up
high on the execution profile. Try to understand which bitmaps can be
replaced by ebitmaps.
* pointer_set and pointer_map are underused.
* Avoid recursive tree walks
* Rewrite for loops over the linked list of instructions (insns), so
that they work on basic blocks and then on the insns for each basic block.
* cxx_binding should be 16 bytes, not 20.
Paolo
