[Bug target/63321] [SH] Unused T bit result of shll / shlr insns

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63321

--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #1)
> 
> void test2_1 (unsigned int x, unsigned int* y)
> {
>   y[0] = x >> 1;
>   y[1] = x & 1;
> }
> 
> will compile to the desired sequence:
>         shlr    r4
>         movt    r1
>         mov.l   r4,@r5
>         rts
>         mov.l   r1,@(4,r5)


Changing the order of the operations to:

void test2_1 (unsigned int x, unsigned int* y)
{
  y[0] = x & 1;
  y[1] = x >> 1;
}

will make it fail to combine the insns though.