[xla:gpu] Fix the dimension order propagation for bitcast #11219
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If bitcast's destination contains a trivial dimension, it will create an unnecessary trivial fragment after propagation. For example: %p = f32[5,1] parameter(0) %bitcast = f32[5] bitcast(%p) When propagating dimension order from bitcast to p, it creates a fragment of size 1 for %p. PiperOrigin-RevId: 621774968
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[xla:gpu] Fix the dimension order propagation for bitcast
If bitcast's destination contains a trivial dimension, it will create an unnecessary trivial fragment after propagation. For example:
%p = f32[5,1] parameter(0)
%bitcast = f32[5] bitcast(%p)
When propagating dimension order from bitcast to p, it creates a fragment of size 1 for %p.