--- Log opened Tue Jul 28 00:00:32 2020
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04:52 < elichai2> Tagged a bunch  of commitee/ compiler maintainers, technically they're C++ people and not C but let's see what they say :P https://twitter.com/Elichai2/status/1288078388364795907
04:53 < elichai2> argh I haven't mentioned that valgrind is relevant
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05:17 < elichai2> real_or_random: why isn't ctime test failing on master with clang10? from your PR it seems like it should (ie the godbolt shows conditionals)
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06:02 < real_or_random> elichai2: you mean from the compiler explorer output?
06:03 < elichai2> yeah
06:03 < real_or_random> what gmaxwell tested is consistent is consistent with travis... I suspect clang behaves differently on the reduced testcase in the compiler explorer, e.g., due to inlining and doing further optimizations
06:03 < real_or_random> but yeah, I was wondering about that too
06:03 < elichai2> it's weird that on godbolt it generates branches but not locally
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06:28 < elichai2> my clang 10 generates these instructions for the check in sign_inner + the int_cmov https://pastebin.com/raw/4b6ZtL71
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11:40 < real_or_random> uh I wasn't aware that MSVC is an officially build option since last november https://github.com/bitcoin/bitcoin/pull/17309/commits/162d0038e772bf6210b9218df35c14fd9719d3f7
11:40 < real_or_random> sipa: do you think it makes sense to put a note there that performance may be much worse. I mean this does not even use our 64bit code
11:54 < sipa> real_or_random: not sure what "officially" means; it's not used for release builds
11:54 < real_or_random> fair
11:54 < sipa> but sure, it definitely makes sense to warn about performance
11:55 < real_or_random> if you look at the diff, it now says this is "supported"
11:55 < real_or_random> and before it was below "Other options which may work, but which have not been extensively tested are (please contribute instructions): "
11:56 < real_or_random> ok, it actually does not say supported but just "known to work". but that's nitpicking anyway
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11:56 < sipa> well, we have CI infrastructure testing it, so there is certainly some level of attempt to keep it working
12:04 < real_or_random> yes. I think for us here is whether this means we should care more about its performance
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--- Log closed Wed Jul 29 00:00:33 2020