[Bug target/107172] [13 Regression] wrong code with "-O1 -ftree-vrp" on x86_64-linux-gnu since r13-1268-g8c99e307b20c502e

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172

--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
Assuming (reg:CCC 17 flags) is set to 1 by compare properly, how should

(insn 50 49 51 2 (parallel [
            (set (reg:SI 93)
                (neg:SI (ltu:SI (reg:CCC 17 flags)
                        (const_int 0 [0]))))
            (clobber (reg:CC 17 flags))
        ]) "107172.c":4:10 1258 {*x86_movsicc_0_m1_neg}
     (expr_list:REG_DEAD (reg:CCC 17 flags)
        (expr_list:REG_UNUSED (reg:CC 17 flags)
            (nil))))

work?