[Bug rtl-optimization/98212] X86 unoptimal code for float equallity comparison followed by jump

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98212

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |crazylht at gmail dot com

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
It seems a regression in GCC10. GCC9 is ok, https://godbolt.org/

GCC 9:
f1(float, float):
        ucomiss xmm0, xmm1
        jp      .L4
        jne     .L4
        ret
.L4:
        jmp     f()
f2(float, float):
        ucomiss xmm0, xmm1
        jnp     .L11
.L7:
        ret
.L11:
        jne     .L7
        jmp     f()

GCC10:
f1(float, float):
        ucomiss %xmm1, %xmm0
        jp      .L4
        comiss  %xmm1, %xmm0
        jne     .L4
        ret
.L4:
        jmp     f()
f2(float, float):
        ucomiss %xmm1, %xmm0
        jnp     .L11
.L7:
        ret
.L11:
        jne     .L7
        jmp     f()