Richard Biener wrote: > I think the patch is ok with these changes but obviously we should try > to address > the code-generation issue on x86 at RTL expansion time. They are sort-of > existing missing optimizations.
Note the only x64 specific issue is the backend expansion of 64-bit immediates which could be improved like I suggested. However what we're really missing is a generic optimization pass that tries to simplify immediates using accurate target costs. In eg. x >= C or x > C we can use either C or C-1 - on many targets one option may be a single instruction, while the other might take 2 or even 3. Wilco
