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Re: binutils-2.15 - work around for gcc optimization problem on sparc -s
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From: |
Eric Botcazou |
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Subject: |
Re: binutils-2.15 - work around for gcc optimization problem on sparc -sun-solaris2.7 |
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Date: |
Wed, 14 Jul 2004 11:58:55 +0200 |
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User-agent: |
KMail/1.4.3 |
> Hi Eric,
Hi Nick,
> Maybe... It involves arithmetic comparisons of pointers to separately
> allocated objects, which is a bit dubious in the first place.
Note that it doesn't compare pointers directly, but first performs a
substraction on pointers which is strictly specified by C99 6.5.6 ยง9: "When
two pointers are substracted, both shall point to elements of the same array
object, or one past the last element of the array object; the result is the
difference of the subscripts of the two array elements."
So my understanding is that there isn't any GCC bug here.
> Doh! Yes - I missed this. Very sorry. I will revert Kelvin's patch.
Thanks!
--
Eric Botcazou