On Tue, 2012-02-28 at 11:52 -0600, William J. Schmidt wrote:
> On Tue, 2012-02-28 at 11:03 -0600, William J. Schmidt wrote:
>
> > I think this is probably a problem with how cprop_into_successor_phis
> > works. It only propagates into immediate successors of a block. In
> > this case copies ar
On Tue, 2012-02-28 at 11:03 -0600, William J. Schmidt wrote:
> I think this is probably a problem with how cprop_into_successor_phis
> works. It only propagates into immediate successors of a block. In
> this case copies are propagated from bb12 into phis in bb13 and bb14 (of
> which there are n
Liu; 'William J. Schmidt'
> >> Cc: gcc@gcc.gnu.org; wschm...@gcc.gnu.org
> >> Subject: RE: A question about redundant PHI expression stmt
> >>
> >>
> >>
> >> > -Original Message-
> >> > From: gcc-ow...@gcc.gnu.or
gcc-ow...@gcc.gnu.org [mailto:gcc-ow...@gcc.gnu.org] On
>> Behalf
>> > Of
>> > > William J. Schmidt
>> > > Sent: Monday, February 27, 2012 11:32 PM
>> > > To: Jiangning Liu
>> > > Cc: gcc@gcc.gnu.org; wschm...@gcc.gnu.org
>> >
> -Original Message-
> From: Jiangning Liu
> Sent: Tuesday, February 28, 2012 4:07 PM
> To: Jiangning Liu; 'William J. Schmidt'
> Cc: gcc@gcc.gnu.org; wschm...@gcc.gnu.org
> Subject: RE: A question about redundant PHI expression stmt
>
>
>
> &g
> -Original Message-
> From: gcc-ow...@gcc.gnu.org [mailto:gcc-ow...@gcc.gnu.org] On Behalf Of
> Jiangning Liu
> Sent: Tuesday, February 28, 2012 11:19 AM
> To: 'William J. Schmidt'
> Cc: gcc@gcc.gnu.org; wschm...@gcc.gnu.org
> Subject: RE: A question abou
> -Original Message-
> From: gcc-ow...@gcc.gnu.org [mailto:gcc-ow...@gcc.gnu.org] On Behalf Of
> William J. Schmidt
> Sent: Monday, February 27, 2012 11:32 PM
> To: Jiangning Liu
> Cc: gcc@gcc.gnu.org; wschm...@gcc.gnu.org
> Subject: Re: A question about redundan
On Fri, 2012-02-24 at 16:07 +0800, Jiangning Liu wrote:
> Hi,
>
> For the small case below, there are some redundant PHI expression stmt
> generated, and finally cause back-end generates redundant copy instructions
> due to some reasons around IRA.
>
> int *l, *r, *g;
> void test_func(int n)
> {
On Fri, Feb 24, 2012 at 9:07 AM, Jiangning Liu wrote:
> Hi,
>
> For the small case below, there are some redundant PHI expression stmt
> generated, and finally cause back-end generates redundant copy instructions
> due to some reasons around IRA.
>
> int *l, *r, *g;
> void test_func(int n)
> {
>
