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[src] Fix for nnet3 bug encountered when implementing deltas. #3495

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Merged
danpovey merged 1 commit into from
Jul 28, 2019
Merged

[src] Fix for nnet3 bug encountered when implementing deltas. #3495

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9 changes: 9 additions & 0 deletions src/nnet3/nnet-compile.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1361,6 +1361,15 @@ void Compiler::OutputDebugInfo(NnetComputation *computation) const {
NnetComputation::MatrixDebugInfo &debug_info =
computation->matrix_debug_info[value_matrix];
debug_info.is_deriv = false;
if (!debug_info.cindexes.empty()) {
// This can happen if we created an alias for a node using a
// dim-range-node that covers all the dimensions (would satisfy
// IsWholeMatrix() above while not being a unique matrix). We sometimes
// do that to work around compiler constraints when creating expressions
// that have the same quantity with more than one scaling value within the
// same expression (like for computing deltas).
continue;
}
AppendCindexes(step_info.node_index, step_info.output_indexes,
&debug_info.cindexes);
if (deriv_matrix != 0) {
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