Re: Non-reproducible AIO failure

On Sat, Jun 7, 2025 at 6:47 AM Andres Freund <andres(at)anarazel(dot)de> wrote:
> On 2025-06-06 14:03:12 +0300, Konstantin Knizhnik wrote:
> > There is really essential difference in code generated by clang 15 (working)
> > and 16 (not working).
>
> There also are code gen differences between upstream clang 17 and apple's
> clang, which is based on llvm 17 as well (I've updated the toolchain, it
> repros with that as well).

Just for the record, Apple clang 17 (self-reported clobbered version)
is said to be based on LLVM 19[1]. For a long time it was off by one
but tada now it's apparently two. Might be relevant if people are
comparing generated code up that close....

. o O (I wonder if one could corroborate that by running "strings" on
upstream clang binaries (as compiled by MacPorts/whatever) for each
major version and finding new strings, ie strings that don't appear in
earlier major versions, and then seeing which ones are present in
Apple's clang binaries... What a silly problem.)

[1] https://en.wikipedia.org/wiki/Xcode#Xcode_15.0_-_16.x_(since_visionOS_support)