7dbd266e89
We should moreElements <3 x s1> to <4 x s1> before we try to widen the element, otherwise we end up with a <3 x s21> nonsense type. (cherry picked from commit a01e9ce86f4c1bc9af819902db9f287b6d23f54f) Test has been changed from original commit due to a fallback in a G_BITCAST. Added abort=2 so we can see partial legalization and check no crash.
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