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Revert "Avoid materializing arrays in bidiag matmul" (#55737)
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Reverts #55450. @jishnub suggested reverting this PR to
fix #55727.
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giordano authored Sep 13, 2024
1 parent 2616634 commit 2ee6551
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Showing 4 changed files with 68 additions and 422 deletions.
4 changes: 1 addition & 3 deletions stdlib/LinearAlgebra/src/LinearAlgebra.jl
Original file line number Diff line number Diff line change
Expand Up @@ -673,9 +673,7 @@ matprod_dest(A::Diagonal, B::Diagonal, TS) = _matprod_dest_diag(B, TS)
_matprod_dest_diag(A, TS) = similar(A, TS)
function _matprod_dest_diag(A::SymTridiagonal, TS)
n = size(A, 1)
ev = similar(A, TS, max(0, n-1))
dv = similar(A, TS, n)
Tridiagonal(ev, dv, similar(ev))
Tridiagonal(similar(A, TS, n-1), similar(A, TS, n), similar(A, TS, n-1))
end

# Special handling for adj/trans vec
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