bors 83c9732e0c Auto merge of #116270 - cjgillot:gvn-aggregate, r=oli-obk,RalfJung ... See through aggregates in GVN This PR is extracted from https://github.com/rust-lang/rust/pull/111344 The first 2 commit are cleanups to avoid repeated work. I propose to stop removing useless assignments as part of this pass, and let a later `SimplifyLocals` do it. This makes tests easier to read (among others). The next 3 commits add a constant folding mechanism to the GVN pass, presented in https://github.com/rust-lang/rust/pull/116012. ~This pass is designed to only use global allocations, to avoid any risk of accidental modification of the stored state.~ The following commits implement opportunistic simplifications, in particular: - projections of aggregates: `MyStruct { x: a }.x` gets replaced by `a`, works with enums too; - projections of arrays: `[a, b][0]` becomes `a`; - projections of repeat expressions: `[a; N][x]` becomes `a`; - transform arrays of equal operands into a repeat rvalue. Fixes https://github.com/rust-lang/miri/issues/3090 r? `@oli-obk`		2023-10-29 14:50:53 +00:00
..
const_eval	Split eval_to_allocation_raw_provider	2023-10-23 08:35:26 +00:00
interpret	Rename has_provance and tweaks comments.	2023-10-25 17:59:30 +00:00
transform	Refactor away the need for some descr methods.	2023-10-25 16:40:32 +00:00
util	Make ty::print::Printer take &mut self instead of self	2023-10-21 11:33:05 +02:00
errors.rs	more precise error for 'based on misaligned pointer' case	2023-10-15 18:13:33 +02:00
lib.rs	docs: add Rust logo to more compiler crates	2023-10-16 15:38:08 -07:00