This reduces the instruction count in some fp64 and int64 piglit tests
---
src/compiler/nir/nir_opt_algebraic.py | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/compiler/nir/nir_opt_algebraic.py
b/src/compiler/nir/nir_opt_algebraic.py
index 8a6dd07..d3eaa1f 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -306,6 +306,12 @@ optimizations = [
(('fabs', ('b2f', a)), ('b2f', a)),
(('iabs', ('b2i', a)), ('b2i', a)),
+ # Packing and then unpacking does nothing
+ (('unpack_64_2x32_split_x', ('pack_64_2x32_split', a, b)), a),
+ (('unpack_64_2x32_split_y', ('pack_64_2x32_split', a, b)), b),
+ (('pack_64_2x32_split', ('unpack_64_2x32_split_x', a),
+ ('unpack_64_2x32_split_y', a)), a),
+
# Byte extraction
(('ushr', a, 24), ('extract_u8', a, 3), '!options->lower_extract_byte'),
(('iand', 0xff, ('ushr', a, 16)), ('extract_u8', a, 2),
'!options->lower_extract_byte'),
--
2.5.0.400.gff86faf
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