On Mon, Nov 21, 2022 at 4:53 PM Andrew Carlotti wrote:
>
> On Mon, Nov 14, 2022 at 04:10:22PM +0100, Richard Biener wrote:
> > On Fri, Nov 11, 2022 at 7:53 PM Andrew Carlotti via Gcc-patches
> > wrote:
> > >
> > > This recognises patterns of the form:
> > > while (n) { n >>= 1 }
> > >
> > > This
On Mon, Nov 14, 2022 at 04:10:22PM +0100, Richard Biener wrote:
> On Fri, Nov 11, 2022 at 7:53 PM Andrew Carlotti via Gcc-patches
> wrote:
> >
> > This recognises patterns of the form:
> > while (n) { n >>= 1 }
> >
> > This patch results in improved (but still suboptimal) codegen:
> >
> > foo (uns
On Fri, Nov 11, 2022 at 7:53 PM Andrew Carlotti via Gcc-patches
wrote:
>
> This recognises patterns of the form:
> while (n) { n >>= 1 }
>
> This patch results in improved (but still suboptimal) codegen:
>
> foo (unsigned int b) {
> int c = 0;
>
> while (b) {
> b >>= 1;
> c
This recognises patterns of the form:
while (n) { n >>= 1 }
This patch results in improved (but still suboptimal) codegen:
foo (unsigned int b) {
int c = 0;
while (b) {
b >>= 1;
c++;
}
return c;
}
foo:
.LFB11:
.cfi_startproc
cbz w0, .L3
