Urgau 33185d3fd9 Rollup merge of #135656 - joshtriplett:hint-mostly-unused, r=saethlin ... Add `-Z hint-mostly-unused` to tell rustc that most of a crate will go unused This hint allows the compiler to optimize its operation based on this assumption, in order to compile faster. This is a hint, and does not guarantee any particular behavior. This option can substantially speed up compilation if applied to a large dependency where the majority of the dependency does not get used. This flag may slow down compilation in other cases. Currently, this option makes the compiler defer as much code generation as possible from functions in the crate, until later crates invoke those functions. Functions that never get invoked will never have code generated for them. For instance, if a crate provides thousands of functions, but only a few of them will get called, this flag will result in the compiler only doing code generation for the called functions. (This uses the same mechanisms as cross-crate inlining of functions.) This does not affect `extern` functions, or functions marked as `#[inline(never)]`. This option has already existed in nightly as `-Zcross-crate-inline-threshold=always` for some time, and has gotten testing in that form. However, this option is still unstable, to give an opportunity for wider testing in this form. Some performance numbers, based on a crate with many dependencies having just *one* large dependency set to `-Z hint-mostly-unused` (using Cargo's `profile-rustflags` option): A release build went from 4m07s to 2m04s. A non-release build went from 2m26s to 1m28s.		2025-06-18 19:40:30 +02:00
..
rustc	Revert "Use workspace lints for crates in compiler/ #138084"	2025-03-10 18:12:47 +08:00
rustc_abi	add extern "custom" functions	2025-06-12 20:27:10 +02:00
rustc_arena	Introduce Arena::try_alloc_from_iter.	2025-04-19 01:13:18 +00:00
rustc_ast	Auto merge of #141061 - dpaoliello:shimasfn, r=bjorn3	2025-06-18 09:24:40 +00:00
rustc_ast_ir	Use -Wunused_crate_dependencies for compiler crates.	2025-03-20 08:59:43 +11:00
rustc_ast_lowering	Reject union default field values	2025-06-17 07:27:58 +08:00
rustc_ast_passes	Fold unnecessary visit_struct_field_def in AstValidator	2025-06-16 17:48:21 +00:00
rustc_ast_pretty	Rollup merge of #142069 - nnethercote:Zmacro-stats, r=petrochenkov	2025-06-13 05:16:56 +02:00
rustc_attr_data_structures	fix clippy	2025-06-17 23:22:51 +02:00
rustc_attr_parsing	make error codes reflect reality better	2025-06-17 23:22:51 +02:00
rustc_baked_icu_data	Add unreachable_pub to RUSTC_LINT_FLAGS for compiler/ crates.	2025-03-11 13:14:21 +11:00
rustc_borrowck	Handle same-crate macro for borrowck semicolon suggestion	2025-06-16 19:58:01 +02:00
rustc_builtin_macros	Rollup merge of #142371 - fee1-dead-contrib:push-xqlkumzurkus, r=petrochenkov	2025-06-17 23:19:34 +02:00
rustc_codegen_cranelift	Auto merge of #141061 - dpaoliello:shimasfn, r=bjorn3	2025-06-18 09:24:40 +00:00
rustc_codegen_gcc	Auto merge of #141061 - dpaoliello:shimasfn, r=bjorn3	2025-06-18 09:24:40 +00:00
rustc_codegen_llvm	Auto merge of #141061 - dpaoliello:shimasfn, r=bjorn3	2025-06-18 09:24:40 +00:00
rustc_codegen_ssa	Auto merge of #141061 - dpaoliello:shimasfn, r=bjorn3	2025-06-18 09:24:40 +00:00
rustc_const_eval	Rollup merge of #142405 - oli-obk:type-once, r=RalfJung	2025-06-13 20:59:17 -07:00
rustc_data_structures	library/compiler: add PointeeSized bounds	2025-06-16 23:04:33 +00:00
rustc_driver	Remove recursion_limit increases.	2025-04-02 16:25:27 +11:00
rustc_driver_impl	Rollup merge of #141769 - bjorn3:codegen_metadata_module_rework, r=workingjubilee,saethlin	2025-06-15 23:51:54 +02:00
rustc_error_codes	make error codes reflect reality better	2025-06-17 23:22:51 +02:00
rustc_error_messages	Fix review comments	2025-06-06 14:20:48 +00:00
rustc_errors	introduce new lint infra	2025-06-12 09:56:47 +02:00
rustc_expand	Rollup merge of #142371 - fee1-dead-contrib:push-xqlkumzurkus, r=petrochenkov	2025-06-17 23:19:34 +02:00
rustc_feature	fix bugs in inline/force_inline and diagnostics of all attr parsers	2025-06-17 23:19:31 +02:00
rustc_fluent_macro	Remove all unused feature gates from the compiler	2025-06-08 14:50:42 +00:00
rustc_fs_util	Retry if creating temp fails with access denied	2025-04-25 11:28:36 +00:00
rustc_graphviz	Remove #![warn(unreachable_pub)] from all compiler/ crates.	2025-03-11 13:14:21 +11:00
rustc_hashes	Revert "Use workspace lints for crates in compiler/ #138084"	2025-03-10 18:12:47 +08:00
rustc_hir	trait_sel: {Meta,Pointee}Sized on Sized types	2025-06-16 15:00:22 +00:00
rustc_hir_analysis	hir_analysis: add {Meta,Pointee}Sized bounds	2025-06-16 23:04:33 +00:00
rustc_hir_pretty	Reduce precedence of expressions that have an outer attr	2025-06-13 18:09:13 -07:00
rustc_hir_typeck	trait_sel: extend fast path with sized hierarchy	2025-06-16 23:04:35 +00:00
rustc_incremental	Auto merge of #139758 - Zoxc:thread-local-graph, r=oli-obk	2025-05-07 12:39:54 +00:00
rustc_index	index: add method for checking range on DenseBitSet	2025-06-04 00:47:12 +02:00
rustc_index_macros	In rustc_mir_tranform, iterate over index newtypes instead of ints	2025-04-12 11:53:07 +00:00
rustc_infer	Auto merge of #141763 - lcnr:fixme-gamer, r=BoxyUwU	2025-06-11 11:47:05 +00:00
rustc_interface	Rollup merge of #135656 - joshtriplett:hint-mostly-unused, r=saethlin	2025-06-18 19:40:30 +02:00
rustc_lexer	rustc_lexer: typo fix + small cleanups	2025-06-06 13:08:16 +00:00
rustc_lint	Auto merge of #138165 - jdonszelmann:inline, r=oli-obk	2025-06-18 06:25:21 +00:00
rustc_lint_defs	Rollup merge of #141937 - WaffleLapkin:never-report-in-deps, r=oli-obk,traviscross	2025-06-15 23:51:55 +02:00
rustc_llvm	rustc_llvm: add Windows system libs only when cross-compiling from Windows	2025-05-31 15:47:14 +02:00
rustc_log	Add documentation for init_logger_with_additional_layer	2025-06-12 12:11:15 +02:00
rustc_macros	Remove all unused feature gates from the compiler	2025-06-08 14:50:42 +00:00
rustc_metadata	Rollup merge of #141769 - bjorn3:codegen_metadata_module_rework, r=workingjubilee,saethlin	2025-06-15 23:51:54 +02:00
rustc_middle	Auto merge of #137944 - davidtwco:sized-hierarchy, r=oli-obk	2025-06-17 15:08:50 +00:00
rustc_mir_build	Unimplement unsized_locals	2025-06-13 01:16:36 +02:00
rustc_mir_dataflow	update cfg(bootstrap)	2025-05-12 15:33:37 +02:00
rustc_mir_transform	Rollup merge of #135656 - joshtriplett:hint-mostly-unused, r=saethlin	2025-06-18 19:40:30 +02:00
rustc_monomorphize	Remove all support for wasm's legacy ABI	2025-06-14 09:57:06 +00:00
rustc_next_trait_solver	trait_sel: skip elaboration of sizedness supertrait	2025-06-16 23:04:36 +00:00
rustc_parse	Auto merge of #138165 - jdonszelmann:inline, r=oli-obk	2025-06-18 06:25:21 +00:00
rustc_parse_format	Add ParseMode::Diagnostic unit tests	2025-06-09 16:28:58 +02:00
rustc_passes	make error codes reflect reality better	2025-06-17 23:22:51 +02:00
rustc_pattern_analysis	Use builin_index instead of hand-rolling it	2025-05-28 10:03:01 +00:00
rustc_privacy	Reorder fields in hir::ItemKind variants.	2025-05-30 02:23:20 +10:00
rustc_proc_macro	Do not get proc_macro from the sysroot in rustc	2025-05-27 15:49:28 +00:00
rustc_query_impl	Auto merge of #140145 - Zoxc:job-server-proxy, r=SparrowLii	2025-05-01 04:11:52 +00:00
rustc_query_system	Do not clone Arc when hashing span.	2025-06-11 23:44:22 +00:00
rustc_resolve	Fix PathSource lifetimes.	2025-06-16 10:33:00 +10:00
rustc_sanitizers	Replace some Option<Span> with Span and use DUMMY_SP instead of None	2025-06-05 14:14:59 +00:00
rustc_serialize	library/compiler: add PointeeSized bounds	2025-06-16 23:04:33 +00:00
rustc_session	Rollup merge of #135656 - joshtriplett:hint-mostly-unused, r=saethlin	2025-06-18 19:40:30 +02:00
rustc_smir	Auto merge of #137944 - davidtwco:sized-hierarchy, r=oli-obk	2025-06-17 15:08:50 +00:00
rustc_span	trait_sel: {Meta,Pointee}Sized on Sized types	2025-06-16 15:00:22 +00:00
rustc_symbol_mangling	Change __rust_no_alloc_shim_is_unstable to be a function	2025-06-16 10:54:07 -07:00
rustc_target	Rollup merge of #142608 - workingjubilee:redescribe-rustc_target-more-accurately, r=wesleywiser	2025-06-17 23:19:37 +02:00
rustc_trait_selection	trait_sel: skip nominal_obligations for Sized	2025-06-16 23:04:36 +00:00
rustc_traits	FIXME(-Znext-solver) triage	2025-06-03 14:23:56 +02:00
rustc_transmute	transmutability: shift abstraction boundary	2025-06-09 14:08:12 +00:00
rustc_ty_utils	hir_analysis: add {Meta,Pointee}Sized bounds	2025-06-16 23:04:33 +00:00
rustc_type_ir	Auto merge of #137944 - davidtwco:sized-hierarchy, r=oli-obk	2025-06-17 15:08:50 +00:00
rustc_type_ir_macros	Split TypeFolder and FallibleTypeFolder	2025-04-15 18:30:35 +00:00
stable_mir	Change rustc_driver dependency on stable_mir crate	2025-04-30 15:39:52 -07:00