Bug#472867: gcc-4.3: gcc regression in optimization (4.2 -> 4.3)

[Cyprien LAPLACE <cyprien+debianbug@cypou.net>]

Arthur Loiret a écrit :
> severity 472867 normal
> thanks
>
>
> On Wed, Mar 26, 2008 at 11:38:53PM +0100, Cyprien LAPLACE wrote:
>   
> > Severity: grave
> > Justification: renders package unusable
> >     
>
> Not that much.
>   
that was breaking one of mine (arm tlb flushing loop)... but I recog it 
should be rare.

> > gcc-4.3 forgets some checks in -O2 and -O3, tested on x86_64 and arm
> > (cross-compiler) targets.
> >     
>
> Can you please report this upstream ? See http://gcc.gnu.org/bugzilla/
>   
I'll need to test it on bare and fresh gnu compiler, which I don't have 
right now. I'll compile one.

> > the following is an exemple code with disassembled generated code by
> > gcc for 4.2 and 4.3 versions:
> >     
>
> It is easier to run gcc with -S (compile but don't assemble) than compile and
> then disassemble the binary.
yes :-)

Regards,
Cyprien