{"action":"created","issue":{"url":"https://api.github.com/repos/m-labs/artiq/issues/591","repository_url":"https://api.github.com/repos/m-labs/artiq","labels_url":"https://api.github.com/repos/m-labs/artiq/issues/591/labels{/name}","comments_url":"https://api.github.com/repos/m-labs/artiq/issues/591/comments","events_url":"https://api.github.com/repos/m-labs/artiq/issues/591/events","html_url":"https://github.com/m-labs/artiq/issues/591","id":183620009,"number":591,"title":"run another instcombine+sccp after licm or something like 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< rjo> whitequark: a quick question. https://github.com/m-labs/artiq/blob/phaser/artiq/examples/phaser/repository/demo.py even with kernel_invariants and\n             fast-math, this generates lots of muldf3 and fixdfsi. anything obvious that prevents that from being const-folded?\n10:12 < whitequark> set_phase and set_amplitude are syscalls, right?\n10:12 < whitequark> actually, no, nevermind\n10:12 < whitequark> do ARTIQ_DUMP_LLVM=foo.ll artiq_run demo.py\n10:12 < whitequark> and give me the file\n10:13 < rjo> http://hastebin.com/fuguwemuqa.pl\n10:15 < rjo> dropping the round() does not help\n10:15 < whitequark> hmmmm\n10:16 < rjo> it's not urgent at all. just something i could not understand.\n10:16 < whitequark> no, that's wrong\n10:16 < whitequark> the round intrinsic is marked as safe to speculatively execute\n10:16 < whitequark> I did that in April\n10:17 < whitequark> oh, I see\n10:17 < whitequark> >curl http://hastebin.com/raw/fuguwemuqa | opt -std-link-opts -S\n10:17 < whitequark> observe the output\n10:18 < whitequark> we need to run another instcombine+sccp after licm or something like that\n10:19 < whitequark> file an issue, I'll fix it later. it's not hard, just needs some time to figure out why the existing pipeline isn't enough\n```\n\nhttp://hastebin.com/fuguwemuqa.ll\n"},"comment":{"url":"https://api.github.com/repos/m-labs/artiq/issues/comments/261827164","html_url":"https://github.com/m-labs/artiq/issues/591#issuecomment-261827164","issue_url":"https://api.github.com/repos/m-labs/artiq/issues/591","id":261827164,"user":{"login":"whitequark","id":54771,"avatar_url":"https://avatars.githubusercontent.com/u/54771?v=3","gravatar_id":"","url":"https://api.github.com/users/whitequark","html_url":"https://github.com/whitequark","followers_url":"https://api.github.com/users/whitequark/followers","following_url":"https://api.github.com/users/whitequark/following{/other_user}","gists_url":"https://api.github.com/users/whitequark/gists{/gist_id}","starred_url":"https://api.github.com/users/whitequark/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/whitequark/subscriptions","organizations_url":"https://api.github.com/users/whitequark/orgs","repos_url":"https://api.github.com/users/whitequark/repos","events_url":"https://api.github.com/users/whitequark/events{/privacy}","received_events_url":"https://api.github.com/users/whitequark/received_events","type":"User","site_admin":false},"created_at":"2016-11-21T02:20:24Z","updated_at":"2016-11-21T02:20:24Z","body":"Reopening as per IRC discussion."}}
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