On 09/06/2016 11:22 AM, Matthew Fortune wrote:
There is an implementation that optimises a single set but not one for
a REG_EQUAL. Do you have any recollection of this code and do you think
there was a reason you didn't implement the REG_EQUAL case? Either way
any advice on my approach is welcome.
Matt, sorry for delay with the answer. I had a long vacation.
I did not write the code. I mostly took it from the old register
allocator practically without any changes.
Looking at your prototype patch, I think you are doing an optimization
which can be important for many targets. Moreover, the optimization
probably will be frequently applied for these targets.
I believe you should produce a final patch, test it well and submit it.
Thank you for finding the optimization opportunity and working on