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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [nir] src/compiler/nir/nir_loop_analyze.c uninitialized variable"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109231">109231</a>
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<th>Summary</th>
<td>[nir] src/compiler/nir/nir_loop_analyze.c uninitialized variable
</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>Other
</td>
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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>Mesa core
</td>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>oschowa@web.de
</td>
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<p>
<div>
<pre>When compiling a release build of a Mesa driver which uses nir and configured
with
'meson -D buildtype=release -D b_ndebug=true ...' gcc 8.2.1 generate this
warning:
[69/241] Compiling C object
'src/compiler/nir/068b2c8@@nir@sta/nir_loop_analyze.c.o'.
../../home/oschowa/mnt/data/_home/storage/builds/mesa/src/compiler/nir/nir_loop_analyze.c:
In function ‘process_loops’:
../../home/oschowa/mnt/data/_home/storage/builds/mesa/src/compiler/nir/nir_loop_analyze.c:270:55:
warning: ‘alu_op’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
if (alu->src[0].src.ssa == alu_srcs[0] &&
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
alu->src[1].src.ssa == alu_srcs[1] &&
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
alu->op == alu_op) {
~~~~~~~~~~~~~~~~~
../../home/oschowa/mnt/data/_home/storage/builds/mesa/src/compiler/nir/nir_loop_analyze.c:255:20:
note: ‘alu_op’ was declared here
nir_op alu_op;
There indeed seems to be a comparison with an uninitialized variable. A debug
build does not trigger this warning.</pre>
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