Re: [avr-gcc-list] Bug in *rotlsi3 insns?

[Georg-Johann Lay]

Anatoly Sokolov schrieb:
> Hi.
>
> > Consider this test case:
> >
> > unsigned long rotl (int dummy, unsigned long x)
> > {
> >     return (x << 8) | (x >> 24);
> > }
> >
> > Compile with, e.g.
> >    avr-gcc -mmcu=atmega8 -S -Os -fno-split-wide-types
> >
> > This will map 0x33221100 to 0x33110033 instead of to 0x22110033
>
> Please test the patch.

reg_overlap_mentioned_p won't suffice because there are two cases 
depending on REGNO(src) < REGNO(dest) and REGNO(src) > REGNO(dest)

Georg-Johann