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never switch on a float

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Folkert 2023-06-01 12:45:02 +02:00
parent ea2a016fd0
commit 140a294460
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1 changed files with 3 additions and 2 deletions
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5
crates/compiler/mono/src/ir/decision_tree.rs
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@ -109,6 +109,7 @@ enum Test<'a> {
arguments: Vec<(Pattern<'a>, InLayout<'a>)>,
},
IsInt([u8; 16], IntWidth),
// stores the f64 bits; u64 so that this type can impl Hash
IsFloat(u64, FloatWidth),
IsDecimal([u8; 16]),
IsStr(Box<str>),
@ -131,7 +132,7 @@ impl<'a> Test<'a> {
// llvm does not like switching on 128-bit values
!matches!(int_width, IntWidth::U128 | IntWidth::I128)
}
Test::IsFloat(_, _) => true,
Test::IsFloat(_, _) => false,
Test::IsDecimal(_) => false,
Test::IsStr(_) => false,
Test::IsBit(_) => true,
@ -2251,7 +2252,7 @@ fn decide_to_branching<'a>(
let tag = match test {
Test::IsInt(v, _) => i128::from_ne_bytes(v) as u64,
Test::IsFloat(v, _) => v,
Test::IsFloat(_, _) => unreachable!("floats cannot be switched on"),
Test::IsBit(v) => v as u64,
Test::IsByte { tag_id, .. } => tag_id as u64,
Test::IsCtor { tag_id, .. } => tag_id as u64,