Auto merge of #130312 - matthiaskrgr:rollup-ihwsc91, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #129320 (Fix crash when labeling arguments for call_once and friends)
 - #130266 (target: default to the medium code model on LoongArch targets)
 - #130297 (Dataflow cleanups)
 - #130299 (Add set_dcx to ParseSess)
 - #130301 (some fixes for clashing_extern_declarations lint)
 - #130305 (Clippy: consider msrv for const context for const_float_bits_conv)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors