[Bug tree-optimization/87205] Inefficient code generation for switch

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87205

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---

> ```
> h(unsigned int, void*):
>   cmp edi, 5
>   jbe .L5
> .L5:
>   mov rdi, rsi
>   jmp f(X*)
> ```
> 
> https://godbolt.org/z/2Lh_GZ

Good, my patch can handle that and can generate direct call:

_Z1hjPv:
.LFB0:
        .cfi_startproc
        movq    %rsi, %rdi
        jmp     _Z1fP1X
        .cfi_endproc