rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

UnsafeCell now has no niches, ever.

Browse Source
This commit is contained in:
Oli Scherer
2022-07-07 10:46:22 +00:00
parent e78e747f53
commit 2a899dc1cf
22 changed files with 73 additions and 512 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
compiler/rustc_middle/src/ty/mod.rs
View File

@@ -1719,11 +1719,9 @@ bitflags! {
const IS_TRANSPARENT = 1 << 2;
// Internal only for now. If true, don't reorder fields.
const IS_LINEAR = 1 << 3;
// If true, don't expose any niche to type's context.
const HIDE_NICHE = 1 << 4;
// If true, the type's layout can be randomized using
// the seed stored in `ReprOptions.layout_seed`
const RANDOMIZE_LAYOUT = 1 << 5;
const RANDOMIZE_LAYOUT = 1 << 4;
// Any of these flags being set prevent field reordering optimisation.
const IS_UNOPTIMISABLE = ReprFlags::IS_C.bits
| ReprFlags::IS_SIMD.bits
@@ -1780,7 +1778,6 @@ impl ReprOptions {
ReprFlags::empty()
}
attr::ReprTransparent => ReprFlags::IS_TRANSPARENT,
attr::ReprNoNiche => ReprFlags::HIDE_NICHE,
attr::ReprSimd => ReprFlags::IS_SIMD,
attr::ReprInt(i) => {
size = Some(i);
@@ -1833,11 +1830,6 @@ impl ReprOptions {
self.flags.contains(ReprFlags::IS_LINEAR)
}
#[inline]
pub fn hide_niche(&self) -> bool {
self.flags.contains(ReprFlags::HIDE_NICHE)
}
/// Returns the discriminant type, given these `repr` options.
/// This must only be called on enums!
pub fn discr_type(&self) -> attr::IntType {