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[fix] aten::stack with dynamic inputs #1804

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mfeliz-cruise
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Description

Resolves error preventing aten::stack from converting correctly with dynamic shapes. Unsqueezed dims used 0 for dynamic dimension which was not aligned correctly with the dynamic dim in the input, switch to using -1.
Fixes # (issue)

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  • Bug fix (non-breaking change which fixes an issue)

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@github-actions github-actions bot added component: conversion Issues re: Conversion stage component: converters Issues re: Specific op converters component: core Issues re: The core compiler component: tests Issues re: Tests labels Apr 4, 2023
@github-actions github-actions bot requested a review from peri044 April 4, 2023 00:12
auto shuffle_layer = ctx->net->addShuffle(*itensor);
TORCHTRT_CHECK(shuffle_layer, "Unable to create shuffle layer from node: " << *n);
shuffle_layer->setReshapeDimensions(util::unsqueezeDims(itensor->getDimensions(), dim));
shuffle_layer->setReshapeDimensions(util::unsqueezeDims(itensor->getDimensions(), dim, 1, false));
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In the description of this PR, it says Unsqueezed dims used 0 for dynamic dimension which was not aligned correctly with the dynamic dim in the input, switch to using -1.. Here the val is 1 (which is typical of an unsqueeze op). Can you elaborate on what's going on here related to dynamic shapes?

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I'm referring to the last arg to unsqueezeDims use_zeros which previously defaulted to true and converted dynamic dimensions to 0 rather than -1.

@mfeliz-cruise mfeliz-cruise requested a review from peri044 April 6, 2023 22:16
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LGTM

@peri044 peri044 merged commit 09e15b2 into pytorch:main Apr 7, 2023
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3 participants