diff options
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index fbf0f694430..73056c3c35c 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -803,6 +803,11 @@ optimizations.extend([ (('i2b', ('iabs', a)), ('i2b', a)), (('inot', ('f2b1', a)), ('feq', a, 0.0)), + # The C spec says, "If the value of the integral part cannot be represented + # by the integer type, the behavior is undefined." "Undefined" can mean + # "the conversion doesn't happen at all." + (('~i2f32', ('f2i32', 'a@32')), ('ftrunc', a)), + # Ironically, mark these as imprecise because removing the conversions may # preserve more precision than doing the conversions (e.g., # uint(float(0x81818181u)) == 0x81818200). |