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[Graph] Cast optimizations #135

Merged
merged 3 commits into from Mar 21, 2023
Merged

[Graph] Cast optimizations #135

merged 3 commits into from Mar 21, 2023

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xinli-git
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Add 3 graph patterns to eliminate redundant casts

  • y1 = cast(x), y2 = cast(x) => y1 = y2 = z = cast(x)
  • same as above but for 3 outputs
  • cast(cast(x)) where the outer casts has the same dtype as x => x

@xinli-centml
Add 3 new graph patterns:
1964320 
 * operator x with 2 or 3 outputs that both has a cast -> combine the cast
 * two redundant casts (a->b->a) -> noop

Since the casts are likely to occur after automatic mixed precision, the
pass is run twice
@xinli-centml
Merge branch 'main' of xinli-git:hidet-org/hidet into cast_optimizations
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@xinli-centml
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@yaoyaoding
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Thanks, @xinli-git!

@yaoyaoding yaoyaoding merged commit 0cea056 into hidet-org:main Mar 21, 2023
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@xinli-git xinli-git deleted the cast_optimizations branch April 21, 2023 17:56
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@xinli-git @yaoyaoding @xinli-centml