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Simplify rustc_mir_dataflow::abs_domain. #134152

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nnethercote
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rustc_mir_dataflow has a typedef AbstractElem that is equal to ProjectionElem<AbstractOperand, AbstractType>. AbstractOperand and AbstractType are both unit types. There is also has a trait Lift to convert a PlaceElem to an AbstractElem.

But rustc_mir_middle already has a typedef ProjectionKind that is equal to ProjectionElem<(), ()>, which is equivalent to AbstractElem. So this commit reuses ProjectionKind in rustc_mir_dataflow, removes AbstractElem, and simplifies the Lift trait.

r? @pnkfelix

`rustc_mir_dataflow` has a typedef `AbstractElem` that is equal to
`ProjectionElem<AbstractOperand, AbstractType>`. `AbstractOperand` and
`AbstractType` are both unit types. There is also has a trait `Lift` to
convert a `PlaceElem` to an `AbstractElem`.

But `rustc_mir_middle` already has a typedef `ProjectionKind` that is
equal to `ProjectionElem<(), ()>`, which is equivalent to
`AbstractElem`. So this commit reuses `ProjectionKind` in
`rustc_mir_dataflow`, removes `AbstractElem`, and simplifies the `Lift`
trait.
@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Dec 10, 2024
@compiler-errors
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r? compiler-errors @bors r+ rollup

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bors commented Dec 11, 2024

📌 Commit 67df7cb has been approved by compiler-errors

It is now in the queue for this repository.

@rustbot rustbot assigned compiler-errors and unassigned pnkfelix Dec 11, 2024
@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Dec 11, 2024
jieyouxu added a commit to jieyouxu/rust that referenced this pull request Dec 12, 2024
…aflow-abs_domain, r=compiler-errors

Simplify `rustc_mir_dataflow::abs_domain`.

`rustc_mir_dataflow` has a typedef `AbstractElem` that is equal to `ProjectionElem<AbstractOperand, AbstractType>`. `AbstractOperand` and `AbstractType` are both unit types. There is also has a trait `Lift` to convert a `PlaceElem` to an `AbstractElem`.

But `rustc_mir_middle` already has a typedef `ProjectionKind` that is equal to `ProjectionElem<(), ()>`, which is equivalent to `AbstractElem`. So this commit reuses `ProjectionKind` in `rustc_mir_dataflow`, removes `AbstractElem`, and simplifies the `Lift` trait.

r? `@pnkfelix`
bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 12, 2024
Rollup of 13 pull requests

Successful merges:

 - rust-lang#122003 (link libunwind dynamically and allow controlling it via `crt-static` on gnullvm targets)
 - rust-lang#133122 (Add unpolished, experimental support for AFIDT (async fn in dyn trait))
 - rust-lang#133859 (Move some alloc tests to the alloctests crate)
 - rust-lang#134070 (Some asm! diagnostic adjustments and a papercut fix)
 - rust-lang#134095 ([CI] Use a lockfile for installing the `datadog` package)
 - rust-lang#134144 (Properly consider APITs for never type fallback ascription fix)
 - rust-lang#134152 (Simplify `rustc_mir_dataflow::abs_domain`.)
 - rust-lang#134154 (suppress field expr with generics error message if it's a method)
 - rust-lang#134155 (Forbid `unsafe_op_in_unsafe_fn` for Hurd)
 - rust-lang#134173 (allow `symbol_intern_string_literal` lint in test modules)
 - rust-lang#134178 (Stabilize the Rust 2024 prelude)
 - rust-lang#134179 (Remove outdated consteval note from `<*mut T>::align_offset` docs.)
 - rust-lang#134187 (Remove `PErr`.)

r? `@ghost`
`@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Dec 12, 2024
…iaskrgr

Rollup of 11 pull requests

Successful merges:

 - rust-lang#122003 (link libunwind dynamically and allow controlling it via `crt-static` on gnullvm targets)
 - rust-lang#133859 (Move some alloc tests to the alloctests crate)
 - rust-lang#134070 (Some asm! diagnostic adjustments and a papercut fix)
 - rust-lang#134144 (Properly consider APITs for never type fallback ascription fix)
 - rust-lang#134152 (Simplify `rustc_mir_dataflow::abs_domain`.)
 - rust-lang#134154 (suppress field expr with generics error message if it's a method)
 - rust-lang#134155 (Forbid `unsafe_op_in_unsafe_fn` for Hurd)
 - rust-lang#134173 (allow `symbol_intern_string_literal` lint in test modules)
 - rust-lang#134178 (Stabilize the Rust 2024 prelude)
 - rust-lang#134179 (Remove outdated consteval note from `<*mut T>::align_offset` docs.)
 - rust-lang#134187 (Remove `PErr`.)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit d71576d into rust-lang:master Dec 12, 2024
6 checks passed
@rustbot rustbot added this to the 1.85.0 milestone Dec 12, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Dec 12, 2024
Rollup merge of rust-lang#134152 - nnethercote:simplify-rustc_mir_dataflow-abs_domain, r=compiler-errors

Simplify `rustc_mir_dataflow::abs_domain`.

`rustc_mir_dataflow` has a typedef `AbstractElem` that is equal to `ProjectionElem<AbstractOperand, AbstractType>`. `AbstractOperand` and `AbstractType` are both unit types. There is also has a trait `Lift` to convert a `PlaceElem` to an `AbstractElem`.

But `rustc_mir_middle` already has a typedef `ProjectionKind` that is equal to `ProjectionElem<(), ()>`, which is equivalent to `AbstractElem`. So this commit reuses `ProjectionKind` in `rustc_mir_dataflow`, removes `AbstractElem`, and simplifies the `Lift` trait.

r? ``@pnkfelix``
@nnethercote nnethercote deleted the simplify-rustc_mir_dataflow-abs_domain branch December 12, 2024 22:37
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5 participants