Can you please file a bug in bugzilla if you haven't already done so?
We can still fix bugs during the next three months ;)
Well, I opened one. Briefly.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63900
dw
On Fri, Nov 14, 2014 at 12:51 AM, David Wohlferd
wrote:
>
> On 11/13/2014 6:02 AM, Richard Biener wrote:
>>
>> On Thu, Nov 13, 2014 at 2:53 PM, Hans-Peter Nilsson
>> wrote:
>>>
>>> On Thu, 13 Nov 2014, David Wohlferd wrote:
Sorry for the (very) delayed response. I'm still looking for
On Thu, Nov 13, 2014 at 01:14:41PM +0100, Richard Biener wrote:
> It might be that RTL alias analysis / CSE give up too early here
> (we don't optimize across asm() on the GIMPLE level at all ... heh).
>
> I didn't look where it gives up (even though appearantly it does).
The cse1 pass doesn't ca
I've forgot if someone mentioned whether we have a test-case in
our test-suite for this feature.
I'm looking thru gcc/testsuite/*.c to see if I can spot anything. It's
not easy since there is a lot of asm and the people who write these
are apparently allergic to using comments to describe wh
On 11/13/2014 6:02 AM, Richard Biener wrote:
On Thu, Nov 13, 2014 at 2:53 PM, Hans-Peter Nilsson wrote:
On Thu, 13 Nov 2014, David Wohlferd wrote:
Sorry for the (very) delayed response. I'm still looking for feedback here so
I can fix the docs.
Thank you for your diligence.
As I said befo
On Thu, Nov 13, 2014 at 2:53 PM, Hans-Peter Nilsson wrote:
> On Thu, 13 Nov 2014, David Wohlferd wrote:
>> Sorry for the (very) delayed response. I'm still looking for feedback here
>> so
>> I can fix the docs.
>
> Thank you for your diligence.
>
>> As I said before, triggering a full memory clo
On Thu, 13 Nov 2014, David Wohlferd wrote:
> Sorry for the (very) delayed response. I'm still looking for feedback here so
> I can fix the docs.
Thank you for your diligence.
> As I said before, triggering a full memory clobber for anything over 16 bytes
> (and most sizes under 16 bytes) makes t
On Thu, Nov 13, 2014 at 1:03 PM, David Wohlferd wrote:
> Sorry for the (very) delayed response. I'm still looking for feedback here
> so I can fix the docs.
>
> To refresh: The topic of conversation was the (extremely) wrong explanation
> that has been in the docs since forever about how to use m
Sorry for the (very) delayed response. I'm still looking for feedback
here so I can fix the docs.
To refresh: The topic of conversation was the (extremely) wrong
explanation that has been in the docs since forever about how to use
memory constraints with inline asm to avoid the performance hi
On Fri, Oct 3, 2014 at 8:41 AM, David Wohlferd wrote:
>
>> You want
>>
>> "=m" (*( struct foo { char x[8]; } __attribute__((may_alias)) *)Dest)
>
>
> Thank you. With your help, that worse-than-useless sample in the docs is
> getting closer to something people can actually use.
>
> Except for one
On Thu, 2 Oct 2014, David Wohlferd wrote:
> > You want
> >
> > "=m" (*( struct foo { char x[8]; } __attribute__((may_alias)) *)Dest)
>
> Thank you. With your help, that worse-than-useless sample in the docs
> is getting closer to something people can actually use.
Thank *you* for your investigat
You want
"=m" (*( struct foo { char x[8]; } __attribute__((may_alias)) *)Dest)
Thank you. With your help, that worse-than-useless sample in the docs
is getting closer to something people can actually use.
Except for one last serious problem: This trick only works for very
specific (and
On Fri, Sep 26, 2014 at 12:37 PM, David Wohlferd
wrote:
>
> On 9/25/2014 12:36 AM, Yury Gribov wrote:
>>
>> On 09/24/2014 12:31 PM, Richard Biener wrote:
>>>
>>> On Wed, Sep 24, 2014 at 9:43 AM, David Wohlferd
>>> wrote:
Hans-Peter Nilsson: I should have listened to you back when you r
On 9/25/2014 12:36 AM, Yury Gribov wrote:
On 09/24/2014 12:31 PM, Richard Biener wrote:
On Wed, Sep 24, 2014 at 9:43 AM, David Wohlferd
wrote:
Hans-Peter Nilsson: I should have listened to you back when you raised
concerns about this. My apologies for ever doubting you.
In summary:
- The "
On 09/24/2014 12:31 PM, Richard Biener wrote:
On Wed, Sep 24, 2014 at 9:43 AM, David Wohlferd wrote:
Hans-Peter Nilsson: I should have listened to you back when you raised
concerns about this. My apologies for ever doubting you.
In summary:
- The "trick" in the docs for using an arbitrarily
On Wed, Sep 24, 2014 at 9:43 AM, David Wohlferd wrote:
> Hans-Peter Nilsson: I should have listened to you back when you raised
> concerns about this. My apologies for ever doubting you.
>
> In summary:
>
> - The "trick" in the docs for using an arbitrarily sized struct to force
> register flushe
Hans-Peter Nilsson: I should have listened to you back when you raised
concerns about this. My apologies for ever doubting you.
In summary:
- The "trick" in the docs for using an arbitrarily sized struct to force
register flushes for inline asm does not work.
- Placing the inline asm in a sep
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