[Bug target/84790] Miscompilation for MIPS16 with -fpic and -Os or -O2

[mschiffer--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84790

--- Comment #10 from Matthias Schiffer <mschif...@universe-factory.net> ---
(In reply to YunQiang Su from comment #8)
> Ohh, In fact we should use $28 if TARGET_USE_GOT.
> 
> Can you help to test this patch?
> 
> ```
> diff --git a/gcc/config/mips/mips.cc b/gcc/config/mips/mips.cc
> index b63d40a357b..fe8641d3916 100644
> --- a/gcc/config/mips/mips.cc
> +++ b/gcc/config/mips/mips.cc
> @@ -3342,7 +3342,7 @@ mips16_gp_pseudo_reg (void)
>  rtx
>  mips_pic_base_register (rtx temp)
>  {
> -  if (MIPS16_GP_LOADS ||!TARGET_MIPS16)
> +  if (MIPS16_GP_LOADS || TARGET_USE_GOT ||!TARGET_MIPS16)
>      return pic_offset_table_rtx;
>  
>    if (currently_expanding_to_rtl)
> ```

Testing might take a while, I haven't built GCC for some time.