rust/tests/ui/transmutability/references
Jack Wrenn 3aa14e3b2e Compute transmutability from rustc_target::abi::Layout
In its first step of computing transmutability, `rustc_transmutability`
constructs a byte-level representation of type layout (`Tree`). Previously, this
representation was computed for ADTs by inspecting the ADT definition and
performing our own layout computations. This process was error-prone, verbose,
and limited our ability to analyze many types (particularly default-repr types).

In this PR, we instead construct `Tree`s from `rustc_target::abi::Layout`s. This
helps ensure that layout optimizations are reflected our analyses, and increases
the kinds of types we can now analyze, including:
- default repr ADTs
- transparent unions
- `UnsafeCell`-containing types

Overall, this PR expands the expressvity of `rustc_transmutability` to be much
closer to the transmutability analysis performed by miri. Future PRs will work
to close the remaining gaps (e.g., support for `Box`, raw pointers, `NonZero*`,
coroutines, etc.).
2024-04-08 15:36:52 +00:00
..
recursive-wrapper-types-bit-compatible-mut.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
recursive-wrapper-types-bit-compatible-mut.stderr safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
recursive-wrapper-types-bit-compatible.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
recursive-wrapper-types-bit-incompatible.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
recursive-wrapper-types-bit-incompatible.stderr Safe Transmute: lowercase diagnostics 2024-03-15 17:55:49 +00:00
recursive-wrapper-types.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
reject_extension.rs safe transmute: require that src referent is smaller than dst 2024-03-13 15:53:48 +00:00
reject_extension.stderr Safe Transmute: lowercase diagnostics 2024-03-15 17:55:49 +00:00
u8-to-unit.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
unit-to-itself.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
unit-to-u8.rs safe transmute: revise safety analysis 2024-02-27 16:22:32 +00:00
unit-to-u8.stderr Safe Transmute: lowercase diagnostics 2024-03-15 17:55:49 +00:00
unsafecell.rs Compute transmutability from rustc_target::abi::Layout 2024-04-08 15:36:52 +00:00
unsafecell.stderr Compute transmutability from rustc_target::abi::Layout 2024-04-08 15:36:52 +00:00