Matthias Krüger 05748c66a0 Rollup merge of #107271 - Zeegomo:drop-rmw, r=oli-obk ... Treat Drop as a rmw operation Previously, a Drop terminator was considered a move in MIR. This commit changes the behavior to only treat Drop as a mutable access to the dropped place. In order for this change to be correct, we need to guarantee that 1. A dropped value won't be used again 2. Places that appear in a drop won't be used again before a subsequent initialization. We can ensure this to be correct at MIR construction because Drop will only be emitted when a variable goes out of scope, thus having: * (1) as there is no way of reaching the old value. drop-elaboration will also remove any uninitialized drop. * (2) as the place can't be named following the end of the scope. However, the initialization status, previously tracked by moves, should also be tied to the execution of a Drop, hence the additional logic in the dataflow analyses. From discussion in [this thread](https://rust-lang.zulipchat.com/#narrow/stream/233931-t-compiler.2Fmajor-changes/topic/.60DROP.60.20to.20.60DROP_IF.60.20compiler-team.23558), originating from https://github.com/rust-lang/compiler-team/issues/558. See also https://github.com/rust-lang/rust/pull/104488#discussion_r1085556010		2023-02-08 18:32:41 +01:00
..
rustc	Add a new rustc_driver dylib to rexport rustc_driver_impl	2023-02-02 07:34:41 +01:00
rustc_abi	also do not add noalias on not-Unpin Box	2023-02-06 12:17:41 +01:00
rustc_apfloat	compiler: remove unnecessary imports and qualified paths	2022-12-10 18:45:34 +01:00
rustc_arena	compiler: remove unnecessary imports and qualified paths	2022-12-10 18:45:34 +01:00
rustc_ast	Rollup merge of #107544 - nnethercote:improve-TokenCursor, r=petrochenkov	2023-02-03 23:04:51 +05:30
rustc_ast_lowering	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_ast_passes	Autoderive ExternBlockSuggestion	2023-01-19 13:52:15 +01:00
rustc_ast_pretty	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_attr	Fix uninlined_format_args for some compiler crates	2023-01-05 19:01:12 +01:00
rustc_baked_icu_data
rustc_borrowck	Auto merge of #107768 - matthiaskrgr:rollup-9u4cal4, r=matthiaskrgr	2023-02-07 20:58:20 +00:00
rustc_builtin_macros	Don't generate unecessary &&self.field in deriving Debug	2023-02-02 22:06:23 +00:00
rustc_codegen_cranelift	Auto merge of #106227 - bryangarza:ctfe-limit, r=oli-obk	2023-01-29 04:11:27 +00:00
rustc_codegen_gcc	session: diagnostic migration lint on more fns	2023-01-30 17:11:35 +00:00
rustc_codegen_llvm	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_codegen_ssa	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_const_eval	Rollup merge of #107769 - compiler-errors:pointer-like, r=eholk	2023-02-08 07:13:26 +01:00
rustc_data_structures	Make an optimal cold path for query_cache_hit	2023-02-06 15:22:12 +01:00
rustc_driver	Remove unneeded extern crate	2023-02-02 07:47:39 +01:00
rustc_driver_impl	Rollup merge of #107771 - estebank:ice-msg, r=compiler-errors	2023-02-08 07:13:27 +01:00
rustc_error_codes	Add extended error message for E0523	2023-02-06 06:58:30 -05:00
rustc_error_messages	Auto merge of #107727 - Dylan-DPC:rollup-b1yexcl, r=Dylan-DPC	2023-02-06 16:28:18 +00:00
rustc_errors	Clean up and comment EmitterWriter.draw_code_line	2023-02-05 19:01:28 +01:00
rustc_expand	rustc_expand: remove huge error imports	2023-02-05 03:47:22 +01:00
rustc_feature	Auto merge of #107297 - Mark-Simulacrum:bump-bootstrap, r=pietroalbini	2023-01-31 19:24:29 +00:00
rustc_fs_util
rustc_graphviz	Fix uninlined_format_args for some compiler crates	2023-01-05 19:01:12 +01:00
rustc_hir	Rename PointerSized to PointerLike	2023-02-07 19:05:53 +00:00
rustc_hir_analysis	Rollup merge of #107555 - edward-shen:edward-shen/dup-trait-suggestion, r=compiler-errors	2023-02-07 17:57:14 +01:00
rustc_hir_pretty	Use Mutability::{is_mut, is_not}	2023-01-30 12:26:26 +00:00
rustc_hir_typeck	Rollup merge of #107779 - compiler-errors:issue-107775, r=jackh726	2023-02-08 07:13:29 +01:00
rustc_incremental	incremental: migrate diagnostics	2023-01-30 17:11:35 +00:00
rustc_index	Fix IndexVec::drain_enumerated	2023-01-19 15:25:33 +00:00
rustc_infer	Auto merge of #107768 - matthiaskrgr:rollup-9u4cal4, r=matthiaskrgr	2023-02-07 20:58:20 +00:00
rustc_interface	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_lexer	Remove double spaces after dots in comments	2023-01-17 08:09:33 +00:00
rustc_lint	Auto merge of #103761 - chenyukang:yukang/fix-103320-must-use, r=compiler-errors	2023-02-06 12:57:37 +00:00
rustc_lint_defs	make unaligned_reference a hard error	2023-01-31 20:28:11 +01:00
rustc_llvm	llvm-16: Use Triple.h from new header location.	2023-02-07 06:51:58 -08:00
rustc_log	Add log-backtrace option to show backtraces along with logging	2023-01-12 00:17:48 +09:00
rustc_macros	Forbid #[suggestion_*(...)] on Vecs	2023-02-01 21:49:45 +01:00
rustc_metadata	Rollup merge of #100599 - MatthewPeterKelly:add-E0523-description-and-test, r=compiler-errors,GuillaumeGomez	2023-02-07 17:57:13 +01:00
rustc_middle	Auto merge of #107768 - matthiaskrgr:rollup-9u4cal4, r=matthiaskrgr	2023-02-07 20:58:20 +00:00
rustc_mir_build	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_mir_dataflow	Rollup merge of #107271 - Zeegomo:drop-rmw, r=oli-obk	2023-02-08 18:32:41 +01:00
rustc_mir_transform	Rollup merge of #107271 - Zeegomo:drop-rmw, r=oli-obk	2023-02-08 18:32:41 +01:00
rustc_monomorphize	Auto merge of #100754 - davidtwco:translation-incremental, r=compiler-errors	2023-01-31 10:20:58 +00:00
rustc_parse	Rollup merge of #107580 - lenko-d:default_value_for_a_lifetime_generic_parameter_produces_confusing_diagnostic, r=compiler-errors	2023-02-06 19:54:14 +05:30
rustc_parse_format	Rollup merge of #106805 - madsravn:master, r=compiler-errors	2023-02-03 06:30:23 +01:00
rustc_passes	rustc_passes: remove huge error imports	2023-02-05 03:47:58 +01:00
rustc_plugin_impl
rustc_privacy	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_query_impl	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_query_system	Make an optimal cold path for query_cache_hit	2023-02-06 15:22:12 +01:00
rustc_resolve	Rename rust_2015 => is_rust_2015	2023-02-02 08:17:13 +00:00
rustc_save_analysis	Review changes	2023-01-31 07:54:01 +00:00
rustc_serialize	compiler: remove unnecessary imports and qualified paths	2022-12-10 18:45:34 +01:00
rustc_session	Sort Generator print-type-sizes according to their yield points	2023-02-05 17:34:33 +01:00
rustc_smir
rustc_span	Rollup merge of #107769 - compiler-errors:pointer-like, r=eholk	2023-02-08 07:13:26 +01:00
rustc_symbol_mangling	Introduce GeneratorWitnessMIR.	2023-01-27 18:58:44 +00:00
rustc_target	Auto merge of #106925 - imWildCat:imWildCat/remove-hardcoded-ios-macbi-target-version, r=wesleywiser	2023-02-02 05:26:09 +00:00
rustc_trait_selection	Rollup merge of #107769 - compiler-errors:pointer-like, r=eholk	2023-02-08 07:13:26 +01:00
rustc_traits	remove unused imports	2023-02-06 17:40:18 +03:00
rustc_transmute	Also remove #![feature(control_flow_enum)] where possible	2023-01-18 10:22:21 -08:00
rustc_ty_utils	Auto merge of #106180 - RalfJung:dereferenceable-generators, r=nbdd0121	2023-02-07 03:35:10 +00:00
rustc_type_ir	ReErased regions are local	2023-02-05 15:29:07 +01:00