Re: [PATCH] Add support on powerpc to change CASE_VALUES_THRESHOLD

2011-07-01 Thread Jakub Jelinek
On Fri, Jul 01, 2011 at 09:57:41AM +0200, Richard Guenther wrote: > Looks good to me. Please leave others 24h to comment on the > special zero value (no idea if we have precedent for it, but it sounds > ok to me). I think the special zero value is just fine, at least much nicer than the http://gc

Re: [PATCH] Add support on powerpc to change CASE_VALUES_THRESHOLD

2011-07-01 Thread Richard Guenther
On Thu, Jun 30, 2011 at 7:06 PM, Michael Meissner wrote: > On Thu, Jun 30, 2011 at 12:31:44PM +0200, Richard Guenther wrote: >> On Thu, Jun 30, 2011 at 12:34 AM, Michael Meissner >> wrote: >> > On the powerpc, switch statements can be expensive, and we would like to be >> > able to tune the thres

Re: [PATCH] Add support on powerpc to change CASE_VALUES_THRESHOLD

2011-06-30 Thread Michael Meissner
On Thu, Jun 30, 2011 at 12:31:44PM +0200, Richard Guenther wrote: > On Thu, Jun 30, 2011 at 12:34 AM, Michael Meissner > wrote: > > On the powerpc, switch statements can be expensive, and we would like to be > > able to tune the threshold of when the compiler generates if statements > > vs. using

Re: [PATCH] Add support on powerpc to change CASE_VALUES_THRESHOLD

2011-06-30 Thread Richard Guenther
On Thu, Jun 30, 2011 at 12:34 AM, Michael Meissner wrote: > On the powerpc, switch statements can be expensive, and we would like to be > able to tune the threshold of when the compiler generates if statements > vs. using a table jump operation (and different processors within the powerpc > have d

[PATCH] Add support on powerpc to change CASE_VALUES_THRESHOLD

2011-06-29 Thread Michael Meissner
On the powerpc, switch statements can be expensive, and we would like to be able to tune the threshold of when the compiler generates if statements vs. using a table jump operation (and different processors within the powerpc have different limits). This patch adds a powerpc tuning option to contr