search for: oaggress

...ould be against making it a reuiqrement as it will severely limit what we do at O3 over O2. FWIW, the Cray compiler considers O3 to be "try to make it as fast as possible without unreasonably increasing compile time" but does not guarantee it absolutely will be faster than -O2. We have -Oaggress for "pull out all the stops, take days to compile the code and you get what you get." :) > A final note: I would like to remove all other variations on the '-O' > flag. That includes the really strange '-O4' behavior. Whether the > compilation is LTO should be a...

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