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RE: [avr-gcc-list] More results from the testsuite with avrtest


From: Weddington, Eric
Subject: RE: [avr-gcc-list] More results from the testsuite with avrtest
Date: Mon, 21 Jan 2008 17:22:26 -0700

 

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Paulo Marques
> Sent: Monday, January 21, 2008 5:15 PM
> To: Andrew Hutchinson
> Cc: address@hidden; Andy Hutchinson
> Subject: Re: [avr-gcc-list] More results from the testsuite 
> with avrtest
> 
> Quoting Andrew Hutchinson <address@hidden>:
> 
> > The bug with PR27364 testcase appears recent.
> >
> > It fails with my 4.3 experimental copy 13/12/2007
> >
> > Ok with avr-gcc (GCC) 4.2.2 (WinAVR 20071221)
> 
> This got me thinking: it would be really nice if we could setup an 
> automated bisection test.
> 
> We could start with something like:
> 
> - known good revision: 117923 (gcc4.2 branch)
> - known bad revision: 131704
> 
> This gives us 13781 revisions to test. By bisecting, we 
> should be able 
> to lock in on the offending patch in less than 14 attempts. A script 
> that automated this bisection process (checkout middle revision, test 
> it, mark good/bad) would be great to find what exectly caused 
> specific 
> regressions.
> 
> I may give it a try tomorrow,
> 

Please see the GCC project about this. IIRC, they already have a script
that does a binary search on failing test cases. IIRC, it is in the
contrib subdirectory.

Eric Weddington




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