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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Anv crashes when using 64-bit vertex inputs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103241">103241</a>
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<th>Summary</th>
<td>Anv crashes when using 64-bit vertex inputs
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/Vulkan/intel
</td>
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<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>joseph.kucia@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>jason@jlekstrand.net
</td>
</tr></table>
<p>
<div>
<pre>"elem_count" isn't calculated correctly for 64bit vertex inputs in
emit_vertex_input(). This leads to crash/assert() in the driver code.
The problem is that vs_prog_data->inputs_read may contain only parts of
varyings mark as used (see try_mask_partial_io() in
src/compiler/nir/nir_gather_info.c). On the other hand, for
vs_prog_data->double_inputs_read whole variables are always marked as used. The
element count is computed as _builtin_popcount(elements) -
_builtin_popcount(elements_double) / 2, but popcount(elements_double) / 2 >
popcount(elements) when only portions of double variables are mark as used.
This can be reproduced using the
VkPositiveLayerTest.CreatePipeline64BitAttributesPositive test from
Vulkan-LoaderAndValidationLayers:
./vk_layer_validation_tests
--gtest_filter='VkPositiveLayerTest.CreatePipeline64BitAttributesPositive'
Note: Google Test filter =
VkPositiveLayerTest.CreatePipeline64BitAttributesPositive
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from VkPositiveLayerTest
[ RUN ] VkPositiveLayerTest.CreatePipeline64BitAttributesPositive
vk_layer_validation_tests: ./genxml/gen9_pack.h:66: __gen_uint: Assertion `v <=
max' failed.
Aborted</pre>
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