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Simplify DestProp memory management #129720

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merged 4 commits into from
Sep 5, 2024

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nnethercote
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The DestProp MIR pass has some convoluted memory management. This PR simplifies it.

r? @davidtwco

It doesn't need to be in there, and the move simplifies lifetimes.
It's not necessary, and just complicates things.
@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 Aug 29, 2024
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rustbot commented Aug 29, 2024

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

@nnethercote
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@JakobDegen is probably the best reviewer, but I'm not sure if they have review permissions.

By making it own the index maps, instead of holding references to them.
This requires moving the free function `find_candidate` into
`Candidate::reset_and_find`. It lets the `'alloc` lifetime be removed
everywhere that still has it.
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cjgillot commented Sep 1, 2024

@bors r+ rollup=iffy

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bors commented Sep 1, 2024

📌 Commit 1be2204 has been approved by cjgillot

It is now in the queue for this repository.

@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 Sep 1, 2024
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I think this is a small, innocuous change and can be rolled up safely.

@bors rollup

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Sep 5, 2024
… r=cjgillot

Simplify DestProp memory management

The DestProp MIR pass has some convoluted memory management. This PR simplifies it.

r? `@davidtwco`
bors added a commit to rust-lang-ci/rust that referenced this pull request Sep 5, 2024
…iaskrgr

Rollup of 6 pull requests

Successful merges:

 - rust-lang#129529 (Add test to build crates used by r-a on stable)
 - rust-lang#129624 (Adjust `memchr` pinning and run `cargo update`)
 - rust-lang#129720 (Simplify DestProp memory management)
 - rust-lang#129796 (Unify scraped examples with other code examples)
 - rust-lang#129891 (Do not request sanitizers for naked functions)
 - rust-lang#129938 (Elaborate on deriving vs implementing `Copy`)

Failed merges:

 - rust-lang#129471 ([rustdoc] Sort impl associated items by kinds and then by appearance)

r? `@ghost`
`@rustbot` modify labels: rollup
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Sep 5, 2024
… r=cjgillot

Simplify DestProp memory management

The DestProp MIR pass has some convoluted memory management. This PR simplifies it.

r? ``@davidtwco``
bors added a commit to rust-lang-ci/rust that referenced this pull request Sep 5, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#128820 (fix: get llvm type of global val)
 - rust-lang#129028 (`impl_trait_overcaptures`: Don't worry about uncaptured contravariant lifetimes if they outlive a captured lifetime)
 - rust-lang#129471 ([rustdoc] Sort impl associated items by kinds and then by appearance)
 - rust-lang#129706 (Rename dump of coroutine by-move-body to be more consistent, fix ICE in dump_mir)
 - rust-lang#129720 (Simplify DestProp memory management)
 - rust-lang#129796 (Unify scraped examples with other code examples)
 - rust-lang#129938 (Elaborate on deriving vs implementing `Copy`)
 - rust-lang#129973 (run_make_support: rename `Command::stdin` to `stdin_buf` and add `std{in,out,err}` config helpers)

r? `@ghost`
`@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Sep 5, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#128820 (fix: get llvm type of global val)
 - rust-lang#129028 (`impl_trait_overcaptures`: Don't worry about uncaptured contravariant lifetimes if they outlive a captured lifetime)
 - rust-lang#129471 ([rustdoc] Sort impl associated items by kinds and then by appearance)
 - rust-lang#129706 (Rename dump of coroutine by-move-body to be more consistent, fix ICE in dump_mir)
 - rust-lang#129720 (Simplify DestProp memory management)
 - rust-lang#129796 (Unify scraped examples with other code examples)
 - rust-lang#129938 (Elaborate on deriving vs implementing `Copy`)
 - rust-lang#129973 (run_make_support: rename `Command::stdin` to `stdin_buf` and add `std{in,out,err}` config helpers)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 15e7a67 into rust-lang:master Sep 5, 2024
6 checks passed
@rustbot rustbot added this to the 1.83.0 milestone Sep 5, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Sep 5, 2024
Rollup merge of rust-lang#129720 - nnethercote:simplify-dest_prop-mm, r=cjgillot

Simplify DestProp memory management

The DestProp MIR pass has some convoluted memory management. This PR simplifies it.

r? ```@davidtwco```
@nnethercote nnethercote deleted the simplify-dest_prop-mm branch September 6, 2024 02:52
@nnethercote nnethercote mentioned this pull request Sep 15, 2024
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5 participants