[Mesa-dev] [PATCH] nir: add is_used_once for fmul(fexp2(a), fexp2(b)) to fexp2(fadd(a, b))

[Samuel Pitoiset]

Otherwise the code size increases because the original fexp2()
instructions can't be deleted.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/compiler/nir/nir_opt_algebraic.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index b30d1df199..d40d59b5cd 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -336,7 +336,7 @@ optimizations = [
    (('~flog2', ('frcp', a)), ('fneg', ('flog2', a))),
    (('~flog2', ('frsq', a)), ('fmul', -0.5, ('flog2', a))),
    (('~flog2', ('fpow', a, b)), ('fmul', b, ('flog2', a))),
-   (('~fmul', ('fexp2', a), ('fexp2', b)), ('fexp2', ('fadd', a, b))),
+   (('~fmul', ('fexp2(is_used_once)', a), ('fexp2(is_used_once)', b)), ('fexp2', ('fadd', a, b))),
    # Division and reciprocal
    (('~fdiv', 1.0, a), ('frcp', a)),
    (('fdiv', a, b), ('fmul', a, ('frcp', b)), 'options->lower_fdiv'),
-- 
2.16.1