[llvm-dev] sdiv in array subscript

[Hongbin Zheng via llvm-dev]

Hi llvm-dev,

Looks like currently ScalarEvolution will give up if there is a sdiv in
array subscript, e.g.

int i;

A[i * 64 / 2]

in this case ScalarEvolution will just return an unknown for (i * 64 / 2).

For this case, InstCombine will do the jobs, but in general, is there a
pass to deal with the sdiv here? like replace sdiv by udiv based on the
range of "i"?

Thanks
Hongbin
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