@danluu Re: http://danluu.com/integer-overflow/ …
In UBSan’ed single_add, %rbx gets used because that’s saved in the ubsan handler so we can return it.
-
@danluu If you add -fno-sanitize-recover, llvm uses rax, as expected in a proper compiler :-) (still saves original args, for the handler)
@filcab Awesome, thanks for the info. Let me try that out and then write an update.
-
-
@danluu Np. I just got too embarrassed to see llvm do that and had to look further. There was a good explanation :-)Thanks. Twitter will use this to make your timeline better. UndoUndo
-
-
-
@danluu Before 3.8.0, clang is still pushing rax needlessly, though: https://godbolt.org/g/5NuMrx gcc 5.* always does it right, too.Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.