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<p>Reviewed-by: Samuel Iglesias Gonsálvez <a
class="moz-txt-link-rfc2396E" href="mailto:siglesias@igalia.com"><siglesias@igalia.com></a></p>
<br>
<div class="moz-cite-prefix">On 24/02/18 00:55, Ian Romanick wrote:<br>
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<blockquote type="cite"
cite="mid:20180223235607.11274-13-idr@freedesktop.org">
<pre wrap="">From: Ian Romanick <a class="moz-txt-link-rfc2396E" href="mailto:ian.d.romanick@intel.com"><ian.d.romanick@intel.com></a>
All platforms had similar results. (Skylake shown)
total instructions in shared programs: 14516592 -> 14516586 (<.01%)
instructions in affected programs: 500 -> 494 (-1.20%)
helped: 2
HURT: 0
total cycles in shared programs: 533167044 -> 533166998 (<.01%)
cycles in affected programs: 6988 -> 6942 (-0.66%)
helped: 2
HURT: 0
Signed-off-by: Ian Romanick <a class="moz-txt-link-rfc2396E" href="mailto:ian.d.romanick@intel.com"><ian.d.romanick@intel.com></a>
---
src/compiler/nir/nir_opt_algebraic.py | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index 0069516..65211e6 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -372,6 +372,7 @@ optimizations = [
(('bcsel@32', a, -0.0, -1.0), ('fneg', ('b2f', ('inot', a)))),
(('bcsel', True, b, c), b),
(('bcsel', False, b, c), c),
+ (('bcsel', a, ('b2f(is_used_once)', b), ('b2f', c)), ('b2f', ('bcsel', a, b, c))),
# The result of this should be hit by constant propagation and, in the
# next round of opt_algebraic, get picked up by one of the above two.
(('bcsel', '#a', b, c), ('bcsel', ('ine', 'a', 0), b, c)),
</pre>
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