In LLVM 19 some details about MC/DC changed, removing and updating some intrinsics:

• llvm/llvm-project@85a7bba
  In instrprof_mcdc_condbitmap_update intrinsic was dropped recently:
• Cleanup MC/DC intrinsics for #82448 llvm/llvm-project#95496

I tried naively to remove the reference to the removed intrinsic #126582, but that's incomplete. Will need more work to adapt to this it seems:

• Cleanup MC/DC intrinsics for #82448 llvm/llvm-project#95496 (comment)