This has got to be a compiler bug, right? -ftrapv should really be checking this add. https://godbolt.org/g/NeEqeZ
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Turns out the departmental machines my students have access to is running Ubuntu 13.04.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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also note the better code from -fsanitize vs. -ftrapv https://godbolt.org/g/GZvBk4
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and also that they're presumably never going to fix this https://godbolt.org/g/w9Dt1C
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Wow. I would not have expected that.
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if you wrote a compiler that ran the constant folder really early you would have expected it :)
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As with everything in CS, piles of reasonable engineering decision leading inexorably to horrible outcomes.
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imma make a t-shirt "99% of life is phase ordering"
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Time for some equality saturation!
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people are actually discussing this on the LLVM list
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