https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64003
--- Comment #4 from dmalcolm at gcc dot gnu.org ---
(In reply to dmalcolm from comment #3)
> fwiw, "insn" seems to be:
>
> (jump_insn:TI 10 4 56 2 (set (pc)
> (if_then_else (eq (reg:CCGC 17 flags)
> (const_int 0 [0]))
> (label_ref 29)
> (pc)))
> /home/david/coding-3/gcc-git-jit-valgrind/get-attr-length-i386.c:3 610
> {*jcc_1}
> (int_list:REG_BR_PROB 2000 (nil))
> -> 29)
...so presumably it's the attr highlighted below:
10920 (define_insn "*jcc_1"
10921 [(set (pc)
10922 (if_then_else (match_operator 1 "ix86_comparison_operator"
10923 [(reg FLAGS_REG) (const_int 0)])
10924 (label_ref (match_operand 0))
10925 (pc)))]
10926 ""
10927 "%!%+j%C1\t%l0"
10928 [(set_attr "type" "ibr")
10929 (set_attr "modrm" "0")
>10930 (set (attr "length_nobnd")
>10931 (if_then_else (and (ge (minus (match_dup 0) (pc))
>10932 (const_int -126))
>10933 (lt (minus (match_dup 0) (pc))
>10934 (const_int 128)))
>10935 (const_int 2)
>10936 (const_int 6)))])
10937
