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Regehr: GCC 4.8 Breaks Broken SPEC 2006 BenchmarksRegehr: GCC 4.8 Breaks Broken SPEC 2006 BenchmarksPosted Mar 23, 2013 16:31 UTC (Sat) by dougg (subscriber, #1894)Parent article: Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks
While on the subject, C seems to give a guarantee that the address one above the top of an array is valid for comparison purposes, as long as it is not de-referenced. What about those folks with similar logic going through an array backwards? IOW what about the address prior to index 0 ('arr - 1' so to speak)?
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Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks Posted Mar 23, 2013 16:52 UTC (Sat) by mansr (guest, #85328) [Link]
You're not allowed to even think about that address.
Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks Posted Mar 23, 2013 22:46 UTC (Sat) by Trelane (subscriber, #56877) [Link]
What address?
Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks Posted Mar 23, 2013 23:05 UTC (Sat) by mansr (guest, #85328) [Link]
Any address below the start of an (array) object.
Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks Posted Mar 24, 2013 1:42 UTC (Sun) by wahern (subscriber, #37304) [Link]
*whoosh* :P
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