On Wed, Feb 29, 2012 at 6:02 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Le 29/02/2012 17:08, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 4:41 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Le 29/02/2012 16:15, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at
Le 01/03/2012 11:09, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 6:02 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Le 29/02/2012 17:08, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 4:41 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Le 29/02/2012 16:15,
Hi,
I'm porting a gcc backend (4.6.1) for a 16-bit MCU with PSI pmode, and
SI ptr_mode.
I have a QoR problem with loops: the chosen IVs are often not good.
I looked at tree-ssa-loop-ivopts.c but it is hard to understand that
code. So sorry if my questions are a bit confused but I would like to
On Wed, Feb 29, 2012 at 9:11 AM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Hi,
I'm porting a gcc backend (4.6.1) for a 16-bit MCU with PSI pmode, and
SI ptr_mode.
I have a QoR problem with loops: the chosen IVs are often not good.
I looked at tree-ssa-loop-ivopts.c but it is hard
The issue is most probably that on GIMPLE we only deal with ptr_mode,
not Pmode, and IVOPTs thinks that pointer induction variables will
have ptr_mode. To fix this the cost computation would need to take
into account ptr_mode to Pmode conversions _and_ would need to
consider Pmode IVs in
On Wed, Feb 29, 2012 at 4:08 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
The issue is most probably that on GIMPLE we only deal with ptr_mode,
not Pmode, and IVOPTs thinks that pointer induction variables will
have ptr_mode. To fix this the cost computation would need to take
Le 29/02/2012 16:15, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 4:08 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
The issue is most probably that on GIMPLE we only deal with ptr_mode,
not Pmode, and IVOPTs thinks that pointer induction variables will
have ptr_mode. To
On Wed, Feb 29, 2012 at 4:41 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Le 29/02/2012 16:15, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 4:08 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
The issue is most probably that on GIMPLE we only deal with ptr_mode,
Le 29/02/2012 17:08, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 4:41 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
Le 29/02/2012 16:15, Richard Guenther a écrit :
On Wed, Feb 29, 2012 at 4:08 PM, Aurelien Buhrig
aurelien.buhrig@gmail.com wrote:
The issue is most
