[llvm-dev] Where's the optimiser gone? (part 5.a): missed tail calls, and more... (original) (raw)

Daniel Sanders via llvm-dev llvm-dev at lists.llvm.org
Mon Dec 3 09:06:19 PST 2018

Hi Stefan,

On Dec 3, 2018, at 06:10, Stefan Kanthak via llvm-dev <llvm-dev at lists.llvm.org> wrote:

"Tim Northover" <t.p.northover at gmail.com> wrote:

Hi,

On Sat, 1 Dec 2018 at 17:37, Stefan Kanthak via llvm-dev <llvm-dev at lists.llvm.org> wrote: Compile the following functions with "-O3 -target amd64" You've been advised before, but you really need to start reporting these as bugs[*] if you actually care about them. These ain't my bugs, these are LLVM's bugs.

FWIW, I think you're misunderstanding Tim's intent there. He's not saying they're your bugs, he's just saying they need to be reported in the correct place.

I don't use LLVM, I just dared to write some posts which pinpoint deficiencies and bugs in it. You should see this as COURTESY. The least I expect from any software developer, and especially a "foundation", is to take action on bug reports, INDEPENDENT how they are reported.

llvm-dev is basically a black-hole as far as bugs go: if no-one takes enough of an interest to either fix or file a bug within a day or two, the issue will be completely forgotten. The list is intended for discussion of issues and future designs, not reporting them. That's clearly LLVM's problem. It seems you got lucky and someone did file at least one report from one of these threads; You got that backwards: YOU are lucky that I took the time to report these bugs! you should expect that to become less frequent. People are willing to assume the best of new contributors, but by the time you reach a dozen threads without actually engaging with the community's procedures that goodwill starts to look a bit threadbare.

Cheers. Tim. [*] https://llvm.org/docs/Contributing.html | If you are working with LLVM and run into a bug, we definitely want | to know about it.

The sentence following that one provides instructions on how to report bugs: Please let us know and follow the instructions in How to submit an LLVM bug report <https://llvm.org/docs/HowToSubmitABug.html> to create a bug report.

Those instructions say: Once you have a reduced test-case, go to the LLVM Bug Tracking System <https://bugs.llvm.org/enter_bug.cgi> and fill out the form with the necessary details (note that you don’t need to pick a category, just use the “new-bugs” category if you’re not sure). You already seem to have reduced test cases (Thanks) so they just need to be reported to the bug tracker.

Unfortunately, it's a bit harder to create an account with the bug tracker than it ought to be as there's been trouble with spam. bugs-admin at lists.llvm.org can set you up with an account.

I DONT WORK WITH LLVM. I was just curious whether it shows bugs and deficiencies I saw in two other C compilers, and documented them. You and your users suffer from these bugs and deficiencies, not me.

regards Stefan

LLVM Developers mailing list llvm-dev at lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

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