tree 6f6ae5f064a683a9f13204f9561039b9b45067a6
parent a8c1e17c4179586d42753e71fc6c464f4cf11d86
author Quinn Dawkins <quinn.dawkins@gmail.com> 1706657052 -0800
committer GitHub <noreply@github.com> 1706657052 -0500
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Add samples for custom kernel match+replace scripts (#16150)

Custom match and replace scripts is a workflow for injecting custom
dispatches into a module without the need for any surrounding compiler
infrastructure for building the dispatches. Custom kernels are paired
with an externally authored script that matches a subgraph and replaces
the subgraph with a call to the kernel, all delivered from independently valid IR.
The examples here use the transform dialect to do this by adding a plugin
point during preprocessing that will run the user provided specification.

The flow demonstrated here requires authoring two functions per kernel
alongside some additional boilerplate.

1. A `func.func @my_kernel(...)` that takes (typically tensor) arguments
   and includes the call to the custom dispatch inline. This can use any
   of the other custom dispatch approaches.

2. A `transform.named_sequence @my_matcher` that describes the
   compatible subgraph to match.