[RFC PATCH] LoongArch: Fix intermittent nptl/tst-cancel32 failure

[Wilco Dijkstra]

Hi Mengqinggang,

> 	REG_L t0, a0, 0*SZREG
> -	PTR_DEMANGLE (ra, t0, t1)
> +	PTR_DEMANGLE (ra, t0, t1, t2)
>	REG_L t0, a0, 1*SZREG
>-	PTR_DEMANGLE2 (sp, t0, t1)
>+	PTR_DEMANGLE2 (sp, t0, t1, t2)

Isn't t0 already a temporary in PTR_DEMANGE as the code above shows?
For mangling, dst is the temporary (and thus cannot be SP), for demangling,
src is the temporary (and thus cannot be SP).

Cheers,
Wilco