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bors 8c4db851a7 Auto merge of #122662 - Mark-Simulacrum:optional-drop, r=bjorn3
Omit non-needs_drop drop_in_place in vtables

This replaces the drop_in_place reference with null in vtables. On librustc_driver.so, this drops about ~17k (11%) dynamic relocations from the output, since many vtables can now be placed in read-only memory, rather than having a relocated pointer included.

This makes a tradeoff by adding a null check at vtable call sites. I'm not sure that's readily avoidable without changing the vtable format (e.g., so that we can use a pc-relative relocation instead of an absolute address, and avoid the dynamic relocation that way). But it seems likely that the check is cheap at runtime.

Accepted MCP: https://github.com/rust-lang/compiler-team/issues/730
2024-05-28 16:04:14 +00:00
.github Rollup merge of #123492 - lcnr:master, r=davidtwco 2024-05-21 20:28:47 +02:00
.reuse
compiler Auto merge of #122662 - Mark-Simulacrum:optional-drop, r=bjorn3 2024-05-28 16:04:14 +00:00
library Rollup merge of #125647 - tspiteri:track-lazy_cell_consume, r=workingjubilee 2024-05-28 02:07:49 -07:00
LICENSES
src Create const block DefIds in typeck instead of ast lowering 2024-05-28 13:38:43 +00:00
tests Auto merge of #122662 - Mark-Simulacrum:optional-drop, r=bjorn3 2024-05-28 16:04:14 +00:00
.editorconfig
.git-blame-ignore-revs
.gitattributes
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.mailmap
Cargo.lock Rollup merge of #125089 - Urgau:non_local_def-suggestions, r=estebank 2024-05-28 02:07:47 -07:00
Cargo.toml
CODE_OF_CONDUCT.md
config.example.toml Remove deprecated field dist.missing-tools 2024-05-25 10:35:07 +03:00
configure
CONTRIBUTING.md
COPYRIGHT
INSTALL.md
LICENSE-APACHE
LICENSE-MIT
README.md
RELEASES.md
rust-bors.toml
rustfmt.toml
triagebot.toml Rollup merge of #125566 - camelid:notify-accepted, r=GuillaumeGomez 2024-05-26 15:28:29 -07:00
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This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

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