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0.312877
2016 Dec 31
0
SCCP is not always correct in presence of undef (+ proposed fix)
...f you think it's easier)
Similarly for or %x, undef.
You need to know if it's really undef, not "something i haven't visited
yet".
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2016 Dec 31
4
SCCP is not always correct in presence of undef (+ proposed fix)
On Fri, Dec 30, 2016, 9:04 PM Sanjoy Das via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi David,
>
> Looking at the original bug, it seems like a straightforward
> undef-propagation bug to me -- SCCP was folding "or undef, constant"
> to "undef", which is wrong. Why is changing that not the fix? That
> is, some variant of
>
You would still