vector.fragment.repack

← vector dialect

Repack a native matrix-fragment payload to another fragment role without going through memory. The source value must carry fragment facts naming its current role and shape; the target role interprets the result vector lanes and payload registers. The logical shape operands are shared by both roles, so result row/column payloads can become lhs row/reduction or rhs reduction/column payloads for attention-style fragment reuse. When the source and result element types differ, the op also represents a fragment-shaped numeric conversion that target lowering must select explicitly or reject with target diagnostics.

Operation contract

Property	Value
Semantic phase	executable
Traits	Pure, RefinableResultTypeRefs

Signature

Kind	Name	Type	Cardinality	Description
Operand	source	vector	required	Native source matrix fragment payload.
Operand	blocks	index	optional	Optional independent matrix block count.
Operand	rows	index	required	Logical matrix row count for the fragment tile.
Operand	columns	index	required	Logical matrix column or reduction count for the fragment tile.
Result	result	vector	required	Native target matrix fragment payload.
Attribute	role	enum VectorFragmentRole	required	—

Examples

%lhs = vector.fragment.repack<lhs> %acc shape [%m, %k] : vector<8xf32> -> vector<16xbf16>