tree f98098c531ec646a7a67f18ae873b0c6d7e91562
parent 95a00359cc0d7af31bac1dc05d675a5c35771103
author ziereis <44057120+ziereis@users.noreply.github.com> 1786733234 +0200
committer GitHub <noreply@github.com> 1786733234 +0200
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[DispatchCreation] Fix GatherFusionPattern on a scalar producer operand (#24803)

GatherFusionPattern builds a tensor.extract for every operand of the
producer generic, so a scalar operand reached cast<TensorType> and
asserted. A scalar is invariant over the iteration space, so there is no
index to permute and nothing to extract: the fused body reads the value
itself.

The producer has to be a bit extend or a transpose to qualify, and that
classification deliberately ignores non-tensor inputs, so a qualifying
producer can have them. A per-tensor dequantize widening i8 to f32 with
its scale passed as an f32 is one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Signed-off-by: default <ziereis@roofline.ai>
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>