[Bug target/115500] RISC-V: Performance regression on 1bit test

[syq at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115500

--- Comment #5 from YunQiang Su <syq at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #4)
> On the gcc-13, gcc-14 and the trunk I get this with -O2 on rv64gc:
> 
>         slli    a5,a0,44
>         blt     a5,zero,.L3
> 
> 
> So ISTM that we must be doing something different.  YunQiang, please make
> sure to include the optimization options used when reporting a bug.
> 

Thanks. I used -O2, and yes, slli/bltz is slower than srli/andi/bnez.