docs: document INTEL_DEBUG 'optimizer' envvar
Reviewed-by: Matt Turner <mattst88@gmail.com>
diff --git a/docs/envvars.html b/docs/envvars.html
index c0d5a51..bdfe999 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -153,6 +153,7 @@
<li>no16 - suppress generation of 16-wide fragment shaders. useful for debugging broken shaders</li>
<li>blorp - emit messages about the blorp operations (blits & 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>