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Bugfix: TFLite If with dynamically allocated tensors.

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Fixes a bug when branch subgraphs have dynamically allocated
inputs/outputs.

The newly added tests are failing without the fix and passing
with the fix.

PiperOrigin-RevId: 351181346
Change-Id: I5bdec6179c03157df9fd012018983384a6a2cb81
This commit is contained in:
Yu-Cheng Ling 2021-01-11 10:18:54 -08:00 committed by TensorFlower Gardener
parent 062e504d66
commit 24efa2683f
1 changed files with 10 additions and 0 deletions
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10
tensorflow/lite/kernels/if.cc
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@ -156,6 +156,11 @@ TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, i + 1, &input)); TF_LITE_ENSURE_OK(context, GetInputSafe(context, node, i + 1, &input));
TfLiteTensor* subgraph_input = TfLiteTensor* subgraph_input =
active_branch_subgraph.tensor(active_branch_subgraph.inputs()[i]); active_branch_subgraph.tensor(active_branch_subgraph.inputs()[i]);
if (IsDynamicTensor(subgraph_input)) {
TfLiteTensorRealloc(input->bytes, subgraph_input);
}
TF_LITE_ENSURE_EQ(context, input->bytes, subgraph_input->bytes); TF_LITE_ENSURE_EQ(context, input->bytes, subgraph_input->bytes);
memcpy(subgraph_input->data.raw, input->data.raw, input->bytes); memcpy(subgraph_input->data.raw, input->data.raw, input->bytes);
} }
@ -195,6 +200,11 @@ TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
active_branch_subgraph.tensor(active_branch_subgraph.outputs()[i]); active_branch_subgraph.tensor(active_branch_subgraph.outputs()[i]);
TfLiteTensor* output; TfLiteTensor* output;
TF_LITE_ENSURE_OK(context, GetOutputSafe(context, node, i, &output)); TF_LITE_ENSURE_OK(context, GetOutputSafe(context, node, i, &output));
if (IsDynamicTensor(output)) {
TfLiteTensorRealloc(subgraph_output->bytes, output);
}
TF_LITE_ENSURE_EQ(context, output->bytes, subgraph_output->bytes); TF_LITE_ENSURE_EQ(context, output->bytes, subgraph_output->bytes);
memcpy(output->data.raw, subgraph_output->data.raw, output->bytes); memcpy(output->data.raw, subgraph_output->data.raw, output->bytes);
} }