[Mesa-dev] [PATCH 2/5] nir: Recognize sum of open-coded pow()s.

[Matt Turner]

Prevents regressions in the next commit.
---
 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 60df69f..0a248a2 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -167,6 +167,7 @@ optimizations = [
    (('flog2', ('fexp2', a)), a), # lg2(2^a) = a
    (('fpow', a, b), ('fexp2', ('fmul', ('flog2', a), b)), 'options->lower_fpow'), # a^b = 2^(lg2(a)*b)
    (('fexp2', ('fmul', ('flog2', a), b)), ('fpow', a, b), '!options->lower_fpow'), # 2^(lg2(a)*b) = a^b
+   (('fexp2', ('fadd', ('fmul', ('flog2', a), b), ('fmul', ('flog2', c), d))), ('fadd', ('fpow', a, b), ('fpow', c, d))),
    (('fpow', a, 1.0), a),
    (('fpow', a, 2.0), ('fmul', a, a)),
    (('fpow', a, 4.0), ('fmul', ('fmul', a, a), ('fmul', a, a))),
-- 
2.4.10