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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - nir_opt_copy_prop_vars.c:454: error: unknown field ‘ssa’ specified in initializer"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109810">109810</a>
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<th>Summary</th>
<td>nir_opt_copy_prop_vars.c:454: error: unknown field ‘ssa’ specified in initializer
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Keywords</th>
<td>bisected, regression
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>Mesa core
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vlee@freedesktop.org
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>caio.oliveira@intel.com
</td>
</tr></table>
<p>
<div>
<pre>GCC 4.4 build error
CC nir/nir_opt_copy_prop_vars.lo
nir/nir_opt_copy_prop_vars.c: In function ‘load_element_from_ssa_entry_value’:
nir/nir_opt_copy_prop_vars.c:454: error: unknown field ‘ssa’ specified in
initializer
nir/nir_opt_copy_prop_vars.c:455: error: unknown field ‘def’ specified in
initializer
nir/nir_opt_copy_prop_vars.c:456: error: unknown field ‘component’ specified in
initializer
nir/nir_opt_copy_prop_vars.c:456: error: extra brace group at end of
initializer
nir/nir_opt_copy_prop_vars.c:456: error: (near initialization for
‘(anonymous).<anonymous>’)
commit 96c32d77763c4b561f751ca360e6539a3c5e7f4d
Author: Caio Marcelo de Oliveira Filho <<a href="mailto:caio.oliveira@intel.com">caio.oliveira@intel.com</a>>
Date: Mon Jan 14 15:28:33 2019 -0800
nir/copy_prop_vars: handle load/store of vector elements
When direct array deref is used on a vector type (for loads and
stores), copy_prop_vars is now smart to propagate values it knows
about.
Given a 'vec4 v', storing to v[3] will update the copy entry for v and
it is equivalent to a write to v.w. Loading from v[1] will try first
to see if there's a known value for v.y -- and drop the load in that
case.
The copy entries still always refer to the entire vectors, so the
operations happen on the parent deref (the 'vector') and the values
are fixed accordingly.
It might be the case now that certain entries have not only different
SSA defs in each element but also those come from different components
than they are set to, because stores to individual elements always
come from a SSA definition with a single component.
Tests related to these cases are now enabled.
v2: Instead of asserting on invalid indices, "load" an undef and
remove the store. (Jason)
v3: Merge code path for the cases of is_array_deref_of_vector into the
regular code path. Add a base_index parameter to
value_set_from_value. (code changes by Jason)
v4: Removed the get_entry_for_deref helper, now being used only once.
Reviewed-by: Jason Ekstrand <<a href="mailto:jason@jlekstrand.net">jason@jlekstrand.net</a>></pre>
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