On 06/08/2018 08:54 PM, M. Chaturvedi wrote: > The `-O0` and `-O2` times are comparable, however. Are there some > compile time flags one could add to make the `-O1` times comparable? > > I asked this question at LLVM, but they don't seem too interested, > so I was wondering if someone could help me here. > http://lists.llvm.org/pipermail/llvm-dev/2018-May/123708.html I guess this seems like an odd question to ask. -O1 is basically all of the optimizations that don't take a long while to run: generate decent-quality code without taking a long while to do it. This precludes most optimizations that have seriously non-linear time or space complexity. Why would you (or anyone) want anything else of -O1? Unless someone has already done the comparative research, it's going to be hard to find enough data to answer your question. -- Andrew Haley Java Platform Lead Engineer Red Hat UK Ltd. <https://www.redhat.com> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671
