diff options
| author | Daniel Schürmann <[email protected]> | 2019-09-25 16:33:10 +0200 |
|---|---|---|
| committer | Daniel Schürmann <[email protected]> | 2019-09-30 09:44:10 +0000 |
| commit | 239423d23451537c3a0fdb3b08a857d03a21cce5 (patch) | |
| tree | 7def517281f6d7689da072c89f10165cc368b1e3 /src/compiler/nir | |
| parent | 99848a57b7563c988f58ddcdf1fd040980d0bfe3 (diff) | |
nir: Remove unnecessary subtraction optimizations
These optimizations are already covered after lowering.
Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Connor Abbott <[email protected]>
Diffstat (limited to 'src/compiler/nir')
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index bf448303437..2e4d7921b72 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -204,7 +204,6 @@ optimizations = [ # If x < 0: 1 - fsat(x) => 1 - 0 => 1 and fsat(1 - x) => fsat(> 1) => 1 # If x > 1: 1 - fsat(x) => 1 - 1 => 0 and fsat(1 - x) => fsat(< 0) => 0 (('~fadd', ('fneg(is_used_once)', ('fsat(is_used_once)', 'a(is_not_fmul)')), 1.0), ('fsat', ('fadd', 1.0, ('fneg', a)))), - (('~fsub', 1.0, ('fsat', a)), ('fsat', ('fsub', 1.0, a))), # 1 - ((1 - a) * (1 - b)) # 1 - (1 - a - b + a*b) @@ -668,7 +667,6 @@ optimizations.extend([ # True/False are ~0 and 0 in NIR. b2i of True is 1, and -1 is ~0 (True). (('ineg', ('b2i32', 'a@32')), a), (('flt', ('fneg', ('b2f', 'a@1')), 0), a), # Generated by TGSI KILL_IF. - (('flt', ('fsub', 0.0, ('b2f', 'a@1')), 0), a), # Generated by TGSI KILL_IF. # Comparison with the same args. Note that these are not done for # the float versions because NaN always returns false on float # inequalities. @@ -934,16 +932,8 @@ optimizations.extend([ (('iand', 0xffff, a), ('extract_u16', a, 0), '!options->lower_extract_word'), # Subtracts - (('~fsub', a, ('fsub', 0.0, b)), ('fadd', a, b)), - (('isub', a, ('isub', 0, b)), ('iadd', a, b)), - (('isub', ('iadd', a, b), b), a), - (('~fsub', ('fadd', a, b), b), a), (('ussub_4x8', a, 0), a), (('ussub_4x8', a, ~0), 0), - (('~fadd', a, ('fsub', 0.0, b)), ('fsub', a, b)), - (('iadd', a, ('isub', 0, b)), ('isub', a, b)), - (('fabs', ('fsub', 0.0, a)), ('fabs', a)), - (('iabs', ('isub', 0, a)), ('iabs', a)), # Lower all Subtractions first - they can get recombined later (('fsub', a, b), ('fadd', a, ('fneg', b))), (('isub', a, b), ('iadd', a, ('ineg', b))), |