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Signed overflow optimization hazards in the kernelSigned overflow optimization hazards in the kernelPosted Aug 16, 2012 13:19 UTC (Thu) by PaulMcKenney (subscriber, #9624)In reply to: Signed overflow optimization hazards in the kernel by ken Parent article: Signed overflow optimization hazards in the kernel
And you are absolutely right: -O2 and no sign of -fwrapv. Perhaps this is more urgent than I was thinking...
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Signed overflow optimization hazards in the kernel Posted Aug 16, 2012 13:58 UTC (Thu) by abatters (✭ supporter ✭, #6932) [Link]
http://marc.info/?t=124806309500001&r=1&w=2
The kernel currently uses -fno-strict-overflow because -fwrapv was buggy in some versions of gcc. Unfortunately -fno-strict-overflow is also buggy in some other versions of gcc. Depending on the version of gcc I compile with, I have to patch the makefile to use one or the other.
Signed overflow optimization hazards in the kernel Posted Aug 16, 2012 22:49 UTC (Thu) by PaulMcKenney (subscriber, #9624) [Link]
Whew! It goes back to being non-urgent. ;-)
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