bjoernager/rust
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CTFE: move target_{i, u}size_{min, max) to rustc_abi::TargetDataLayout

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This commit is contained in:
Moulins 2023-07-01 23:54:06 +02:00
parent bf2f8ff2ec
commit 39cfe70e4f
8 changed files with 37 additions and 49 deletions
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24
compiler/rustc_abi/src/lib.rs
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@ -354,17 +354,19 @@ impl TargetDataLayout {
}
}
/// Returns the theoretical maximum address.
///
/// Note that this doesn't take into account target-specific limitations.
#[inline]
pub fn max_address(&self) -> u64 {
match self.pointer_size.bits() {
16 => u16::MAX.into(),
32 => u32::MAX.into(),
64 => u64::MAX,
bits => panic!("max_address: unknown pointer bit size {}", bits),
}
pub fn target_usize_max(&self) -> u64 {
self.pointer_size.unsigned_int_max().try_into().unwrap()
}
#[inline]
pub fn target_isize_min(&self) -> i64 {
self.pointer_size.signed_int_min().try_into().unwrap()
}
#[inline]
pub fn target_isize_max(&self) -> i64 {
self.pointer_size.signed_int_max().try_into().unwrap()
}
/// Returns the (inclusive) range of possible addresses for an allocation with
@ -373,7 +375,7 @@ impl TargetDataLayout {
/// Note that this doesn't take into account target-specific limitations.
#[inline]
pub fn address_range_for(&self, size: Size, align: Align) -> (u64, u64) {
let end = Size::from_bytes(self.max_address());
let end = Size::from_bytes(self.target_usize_max());
let min = align.bytes();
let max = (end - size).align_down_to(align).bytes();
(min, max)