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[mlir][vector] Linearization: push 'bit width' logic out of patterns #136581

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Merged
merged 5 commits into from
Apr 30, 2025
Merged

[mlir][vector] Linearization: push 'bit width' logic out of patterns #136581

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b523a5a
factorize out the logic about bounded bitwidth
newling Apr 21, 2025
86ceb57
clang-format
newling Apr 21, 2025
be48849
push further with the separation of concerns
newling Apr 22, 2025
5d21371
clang-format
newling Apr 22, 2025
cbd1069
fix typo
newling Apr 22, 2025
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35 changes: 23 additions & 12 deletions mlir/include/mlir/Dialect/Vector/Transforms/VectorRewritePatterns.h
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Original file line number Diff line number Diff line change
Expand Up @@ -392,18 +392,29 @@ void populateVectorNarrowTypeRewritePatterns(RewritePatternSet &patterns,
void populateVectorTransposeNarrowTypeRewritePatterns(
RewritePatternSet &patterns, PatternBenefit benefit = 1);

/// Populates patterns for ND vectors (N >= 2) linearization and sets up the
/// provided ConversionTarget with the appropriate legality configuration for
/// the ops to get converted properly.
void populateVectorLinearizeTypeConversionsAndLegality(
TypeConverter &typeConverter, RewritePatternSet &patterns,
ConversionTarget &target, unsigned targetBitWidth);

/// Populates patterns for linearizing ND (N >= 2) vector operations to 1D
/// vector shuffle operations.
void populateVectorLinearizeShuffleLikeOpsPatterns(
const TypeConverter &typeConverter, RewritePatternSet &patterns,
ConversionTarget &target, unsigned targetBitWidth);
/// Initialize `typeConverter` and `conversionTarget` for vector linearization.
/// This registers (1) which operations are legal and hence should not be
/// linearized, (2) what converted types are (rank-1 vectors) and how to
/// materialze the conversion (with shape_cast)
///
/// Note: the set of legal operations can be extended by a user if for example
/// certain rank>1 vectors are considered valid, but adding additional
/// dynamically legal ops to `conversionTarget`.
void populateForVectorLinearize(TypeConverter &typeConverter,
ConversionTarget &conversionTarget);

/// Populates `patterns` for ND vector (N >= 2) linearization. This currently
/// contains patterns for converting ConstantLike, Vectorizable, and
/// vector::BitCast ops.
void populateVectorLinearizeBasePatterns(const TypeConverter &,
const ConversionTarget &,
RewritePatternSet &patterns);

/// Populates `patterns` for linearizing ND (N >= 2) vector operations
/// to 1D vector shuffle operations.
void populateVectorLinearizeShuffleLikeOpsPatterns(const TypeConverter &,
const ConversionTarget &,
RewritePatternSet &patterns);

} // namespace vector
} // namespace mlir
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