On Tue, Mar 24, 2020 at 10:45 AM Stefan Schulze Frielinghaus
wrote:
>
> On Mon, Mar 23, 2020 at 04:44:56PM +0100, Richard Biener wrote:
> > On Mon, Mar 23, 2020 at 4:34 PM Jakub Jelinek wrote:
> > >
> > > On Mon, Mar 23, 2020 at 04:29:12PM +0100, Richard Biener wrote:
> > > > I wonder if we can l
On Mon, Mar 23, 2020 at 04:44:56PM +0100, Richard Biener wrote:
> On Mon, Mar 23, 2020 at 4:34 PM Jakub Jelinek wrote:
> >
> > On Mon, Mar 23, 2020 at 04:29:12PM +0100, Richard Biener wrote:
> > > I wonder if we can leverage the bswap pass for rotate detection
> > > (see find_bswap_or_nop which ma
On Mon, Mar 23, 2020 at 4:34 PM Jakub Jelinek wrote:
>
> On Mon, Mar 23, 2020 at 04:29:12PM +0100, Richard Biener wrote:
> > I wonder if we can leverage the bswap pass for rotate detection
> > (see find_bswap_or_nop which matches the symbolic number
> > against either 1:1 or byte-swapped variants,
On Mon, Mar 23, 2020 at 04:29:12PM +0100, Richard Biener wrote:
> I wonder if we can leverage the bswap pass for rotate detection
> (see find_bswap_or_nop which matches the symbolic number
> against either 1:1 or byte-swapped variants, to be added would be
> rotate and shift patterns).
That pass c
On Mon, Mar 23, 2020 at 2:23 PM Stefan Schulze Frielinghaus via
Gcc-patches wrote:
>
> Hi all,
>
> A rotate of a signed integer is not recognized so far.
>
> int32_t f (int32_t x)
> {
> return (x << 5) | (int32_t)((uint32_t)x >> 27);
> }
>
> The code above is unoptimized in contrast to a
Hi all,
A rotate of a signed integer is not recognized so far.
int32_t f (int32_t x)
{
return (x << 5) | (int32_t)((uint32_t)x >> 27);
}
The code above is unoptimized in contrast to a version consisting only
of unsigned integers. I'm wondering if this is intended or not. Since
GCC ha
