gcc/testsuite/selftests/const-int.rtl

(function "const_int_examples"
  (insn-chain
    (block 2
      (edge-from entry (flags "FALLTHRU"))
      (cinsn 1
        (set (reg:SI <0>) (const_int 0))
        "test.c":2 (nil))
      (cinsn 2
        (set (reg:SI <1>) (const_int 1))
        "test.c":2 (nil))
      (cinsn 3
        (set (reg:SI <2>) (const_int -1))
        "test.c":2 (nil))
      (cinsn 4
        (set (reg:SI <3>) (const_int 256))
        "test.c":2 (nil))
      (edge-to exit (flags "FALLTHRU"))
    ) ;; block 2
  ) ;; insn-chain
) ;; function