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We use dead code elimination (DCE) throughout JAX core to remove unused computations from Jaxprs. This typically works transparently when we're just using `lax` primitives, but opaque calls to `pallas_call` or `ffi_call` can't be cleaned up this way. For many kernels however, the author will know how to generate a more efficient call for specific patterns of used outputs, so it is useful to provide a mechanism for customizing this behavior. In https://github.com/jax-ml/jax/pull/22735, I attempted to automatically tackle one specific example of this that comes up frequently, but there have been feature requests for a more general API. This version is bare bones and probably rough around the edges, but it could be a useful starting point for iteration. PiperOrigin-RevId: 718950828
19 lines
682 B
Python
19 lines
682 B
Python
# Copyright 2025 The JAX Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from jax._src.custom_dce import (
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custom_dce as custom_dce,
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custom_dce_p as custom_dce_p,
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)
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