> -----Original Message----- > From: Brian Budge [mailto:brian.budge@xxxxxxxxx] > Sent: 28 August 2013 15:28 > To: Paulo Matos > Cc: GCC-help > Subject: Re: restrict on casted pointers > > On Wed, Aug 28, 2013 at 7:12 AM, Paulo Matos <pmatos@xxxxxxxxxxxx> wrote: > > > > Now that you mentioned it I did look into bugzilla but didn't find any > report that matches my concern. However, there are indeed a few bugs > regarding restrict. > > So, given your reply I guess you support the view that this is a gcc missed > optimization instead of a problem in my interpretation of restrict. > > > > > > Paulo Matos > > > > Hi Paulo - > > I'm not an expert with restrict, but I am also under the impression > that this is a missed optimization. Unless something has changed in > the standard wrt restrict, it is at least curious that gcc used to (I > think even up to 4.7) optimize this well. > > Brian Yes, I can confirm that GCC 4.5.4 was able to optimize this at cse1. I am going to try to understand why 4.8.1 is not doing this anymore. -- Paulo
