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-rw-r--r--src/compiler/nir/nir_opt_algebraic.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index 49c1460e25a..bd65eff8b59 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -158,6 +158,10 @@ optimizations = [
# a != 0.0
(('flt', 0.0, ('fabs', a)), ('fne', a, 0.0)),
+ # ignore this opt when the result is used by a bcsel or if so we can make
+ # use of conditional modifiers on supported hardware.
+ (('flt(is_not_used_by_conditional)', ('fadd(is_used_once)', a, ('fneg', b)), 0.0), ('flt', a, b)),
+
(('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)),
(('bcsel', ('flt', b, a), b, a), ('fmin', a, b)),
(('bcsel', ('flt', a, b), b, a), ('fmax', a, b)),