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-rw-r--r--docs/envvars.html1
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diff --git a/docs/envvars.html b/docs/envvars.html
index c0d5a51b482..bdfe9991a6c 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -153,6 +153,7 @@ See the <a href="xlibdriver.html">Xlib software driver page</a> for details.
<li>no16 - suppress generation of 16-wide fragment shaders. useful for debugging broken shaders</li>
<li>blorp - emit messages about the blorp operations (blits &amp; clears)</li>
<li>nodualobj - suppress generation of dual-object geometry shader code</li>
+ <li>optimizer - dump shader assembly to files at each optimization pass and iteration that make progress</li>
</ul>
</ul>