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nullable wrapped tags

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Folkert 2022-08-06 14:40:00 +02:00
parent 98e1ee1bf7
commit 546b702740
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8 changed files with 361 additions and 10 deletions
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7
crates/compiler/mono/src/layout.rs
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@ -472,10 +472,13 @@ impl<'a> UnionLayout<'a> {
tags.len() < target_info.ptr_width() as usize
}
pub const POINTER_MASK_32BIT: usize = 0b0000_0111;
pub const POINTER_MASK_64BIT: usize = 0b0000_0011;
pub fn tag_id_pointer_bits_and_mask(target_info: TargetInfo) -> (usize, usize) {
match target_info.ptr_width() {
PtrWidth::Bytes8 => (3, 0b0000_0111),
PtrWidth::Bytes4 => (2, 0b0000_0011),
PtrWidth::Bytes8 => (3, Self::POINTER_MASK_64BIT),
PtrWidth::Bytes4 => (2, Self::POINTER_MASK_32BIT),
}
}