Meta Tracking Issue for LLVM workarounds

[jieyouxu]

This is a meta tracking issues for LLVM workarounds that should eventually be removed once newer LLVM versions render the workarounds obsolete. Please edit this issue to backlink to relevant PRs or issues as suitable (preferably open new issues for specific LLVM workarounds). You can also leave a FIXME(#135981) or a FIXME backlinking to a dedicated issue in code to backlink to this tracking issue. Please remove entries if they are cleaned up.

Tracked by WG-llvm

• llvm-fixed-upstream Issue expected to be fixed by the next major LLVM upgrade, or backported fixes

Fixed in LLVM 20

• Workaround for llvm bug for f32x3 saturating fp->int opt-level=0 on aarch64 is fixed in LLVM 20 #135982