search for: reuiqrements

...ue number is if they participate in 2-address instructions where a copy had to be introduced to satisfy the read-write requirements of the instruction? And further, in that case, LiveIntervals for virtual registers should only have at most two value numbers? How about on targets without these reuiqrements? Should LiveIntervals for virtual registers only ever have one value number? -Dave

Chandler Carruth <chandlerc at gmail.com> writes: > 4) Good, well-balanced optimizations, or '-O2' > - Attribute: opt (new attribute) Since all other levels have a qualifier, I'd suggest we do that here as well. Perhaps balancedopt? > 5) Optimize to the max or '-O3' > - Attribute: maxopt (new attribute) > - Goal: produce the fastest binary possible.

This has been an idea floating around in my head for a while and after several discussions with others it continues to hold up so I thought I would mail it out. Sorry for cross posting to both lists, but this is an issue that would significantly impact both LLVM and Clang. Essentially, LLVM provides canned optimization "levels" for frontends to re-use. This is nothing new. However, we