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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - radv: OpBitFieldInsert produces 0 with a loop counter for Insert"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104119">104119</a>
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<th>Summary</th>
<td>radv: OpBitFieldInsert produces 0 with a loop counter for Insert
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
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<th>Version</th>
<td>git
</td>
</tr>
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<th>Hardware</th>
<td>Other
</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>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/Vulkan/radeon
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>jlegg@feralinteractive.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=135980" name="attach_135980" title="test application that reproduces the bug">attachment 135980</a> <a href="attachment.cgi?id=135980&action=edit" title="test application that reproduces the bug">[details]</a></span>
test application that reproduces the bug
On RADV, the SPIR-V OpBitFieldInsert opcode produces 0 when the Insert
parameter derives from a variable used as a loop counter. For example, the
following GLSL compute shader writes 0 to the first 8 elements of the buffer at
binding 0:
#version 450 core
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
layout (std430, set = 0, binding = 0)
restrict writeonly buffer u2_cs { uint u2[]; };
void main()
{
for (int i = 0; i < 8; i++)
u2[i] = bitfieldInsert(0, i, 16, 2);
}
I've attached a program that reproduces the bug.
I'm using the LLVM release_50 branch at revision 318947 and the Mesa master
branch at 20d37da597653201d2c524434907e817bd03b1d0.</pre>
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