llvm-project/llvm/test/tools/llvm-ifs/version-ok.ifs

# RUN: llvm-ifs --input-format=IFS --output-ifs - %s %S/object.ifs

--- !ifs-v1
IfsVersion: 3.0
Target:          x86_64-unknown-linux-gnu
Symbols:
  - { Name: a, Type: Func }
...