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Use more .noalias()

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This commit is contained in:
Markus Vieth
2025-03-17 19:32:43 +01:00
parent 14f845a1a8
commit 0259a52b0e
6 changed files with 15 additions and 14 deletions
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4
Eigen/src/SVD/UpperBidiagonalization.h
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@@ -172,7 +172,7 @@ void upperbidiagonalization_blocked_helper(
// 1 - update the k-th column of A
SubColumnType v_k = A.col(k).tail(remainingRows);
v_k -= V_k1 * Y.row(k).head(k).adjoint();
if (k) v_k -= X_k1 * A.col(k).head(k);
if (k) v_k.noalias() -= X_k1 * A.col(k).head(k);
// 2 - construct left Householder transform in-place
v_k.makeHouseholderInPlace(tau_v, diagonal[k]);
@@ -203,7 +203,7 @@ void upperbidiagonalization_blocked_helper(
SubRowType u_k(A.row(k).tail(remainingCols));
u_k = u_k.conjugate();
{
u_k -= Y_k * A.row(k).head(k + 1).adjoint();
u_k.noalias() -= Y_k * A.row(k).head(k + 1).adjoint();
if (k) u_k -= U_k1.adjoint() * X.row(k).head(k).adjoint();
}