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Merged
merged 1 commit into from
May 23, 2025
Merged

[pull] main from openxla:main #168

merged 1 commit into from
May 23, 2025

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@pull pull bot commented May 23, 2025 •
edited by sourcery-ai bot
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Created by pull[bot] (v2.0.0-alpha.1)

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Summary by Sourcery

Implement reduction factor logic for slice dimensions of size one in the op sharding rule registry and adjust gather tests to align with updated sharding rule outputs

Enhancements:

  • Add reduction factor handling for singleton slice dimensions in gather/scatter rule registry
  • Change collapsed gather slice dimensions to use reduction factors instead of pass-through

Tests:

  • Update MLIR gather tests to reflect new shapes and include reduction and replication flags in expected sharding rules

@tomnatan30 @copybara-github
#sdy mark collapsed-slice-dims and other operand dims with slice size…
adf1050 
… 1 in `stablehlo.gather` as reduction factors.

The partitioner keeps the operand sharded on those dims, but an all-reduce(select(...)) is required on the result.

PiperOrigin-RevId: 762451781
@pull pull bot added the ⤵️ pull label May 23, 2025
@pull pull bot merged commit adf1050 into Stars1233:main May 23, 2025
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sourcery-ai bot commented May 23, 2025 •
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Reviewer's Guide

This PR enhances the gather/scatter sharding rule registry by introducing reduction factors for unit-sized slices and collapsed dimensions, and updates the MLIR test suite to reflect the new tensor shapes and sharding attributes for stablehlo.gather operations.

File-Level Changes

Change Details Files
Enhanced gather/scatter factor generation to introduce reduction for unit slice sizes and collapsed dims
  • Added branch for slicesDimSize == 1 to emit a Reduction factor alongside replication
  • Adjusted collapsed slice-dimension handling to use Reduction (for gather) instead of PassThrough
 shardy/dialect/sdy/transforms/propagation/op_sharding_rule_registry.cc
Updated MLIR tests for stablehlo.gather to reflect new sharding rule attributes
  • Adjusted input/output tensor dimensions in @gather tests
  • Updated offset_dims, start_index_map, and slice_sizes in test annotations
  • Added reduction markers to expected sdy.sharding_rule annotations
 shardy/dialect/sdy/transforms/propagation/test/op_sharding_rule_registry.mlir
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