[complex-math-expander] Add basic complex arithmetic decomposition#2929

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ddilbazTT wants to merge 7 commits intoopenxla:mainfrom

Commits on Mar 30, 2026

Edit stablehlo/tests/chlo/chlo_legalize_to_stablehlo.mlir filecheck by regenerating them. build/bin/stablehlo-opt --chlo-legalize-to-stablehlo --split-input-file --verify-diagnostics stablehlo/test…
ddilbazTT
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Complex math expander full vs default - need to create a new td file after this commit
ddilbazTT
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Separate default vs full expansion patterns into two different files
ddilbazTT
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Working generate_tests.py changes
ddilbazTT
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Add complex multiplication tests
ddilbazTT
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Restore stablehlo/tests/chlo/chlo_legalize_to_stablehlo.mlir
ddilbazTT
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Merge branch 'main' into main
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