161 Commits

Author	SHA1	Message	Date
bors	2b094b1ede	Auto merge of #105446 - erikdesjardins:vt-size, r=nikic ... Add 0..=isize::MAX range metadata to size loads from vtables This is the (much belated) size counterpart to #91569. Inspired by https://rust-lang.zulipchat.com/#narrow/stream/187780-t-compiler.2Fwg-llvm/topic/Range.20metadata.20for.20.60size_of_val.60.20and.20other.20isize.3A.3AMAX.20limits. This could help optimize layout computations based on the size of a dyn trait. Though, admittedly, adding this to vtables wouldn't be as beneficial as adding it to slice len, which is used much more often. Miri detects this UB already: b7cc99142a/compiler/rustc_const_eval/src/interpret/traits.rs (L119-L121) (In fact Miri goes further, [assuming a 48-bit address space on 64-bit platforms](9db224fc90/compiler/rustc_abi/src/lib.rs (L312-L331)), but I don't think we can assume that in an optimization.)	2022-12-18 22:01:39 +00:00
Matthias Krüger	2ea368e53c	minor code cleanups	2022-12-12 19:49:53 +01:00
KaDiWa	9bc69925cb	compiler: remove unnecessary imports and qualified paths	2022-12-10 18:45:34 +01:00
Erik Desjardins	a99e97af97	Add 0..=isize::MAX range metadata to size loads from vtables	2022-12-08 01:30:07 -05:00
bors	9db224fc90	Auto merge of #105175 - michaelwoerister:add-stable-ord-trait, r=nagisa ... Add StableOrd trait as proposed in MCP 533. The `StableOrd` trait can be used to mark types as having a stable sort order across compilation sessions. Collections that sort their items in a stable way can safely implement HashStable by hashing items in sort order. See https://github.com/rust-lang/compiler-team/issues/533 for more information.	2022-12-06 09:21:49 +00:00
Matthias Krüger	1a2f79b82c	Rollup merge of #105050 - WaffleLapkin:uselessrefign, r=jyn514 ... Remove useless borrows and derefs They are nothing more than noise. <sub>These are not all of them, but my clippy started crashing (stack overflow), so rip :(</sub>	2022-12-03 17:37:42 +01:00
Michael Woerister	3a58309798	Add StableOrd trait as proposed in MCP 533. ... The StableOrd trait can be used to mark types as having a stable sort order across compilation sessions. Collections that sort their items in a stable way can safely implement HashStable by hashing items in sort order.	2022-12-02 15:19:30 +01:00
Maybe Waffle	f2b97a8bfe	Remove useless borrows and derefs	2022-12-01 17:34:43 +00:00
hkalbasi	56126fb149	Extract llvm datalayout parsing out of spec module	2022-11-30 21:13:54 +03:30
Oli Scherer	d7f5d784d7	Simplify and document range layout computation	2022-11-25 08:39:11 +00:00
hkalbasi	390a637e29	move things from rustc_target::abi to rustc_abi	2022-11-24 16:26:13 +03:30