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On 1/14/2013 3:09 AM, Chandler Carruth wrote: > > [...] This level should always produce > binaries at least as fast as quickopt, but they might be both slower to > compile. The "always" part cannot really be guaranteed or enforced. I'd state it in terms of intention, i.e. "this level is intended to produce binaries at least as fast as quickopt". Otherwise,

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