bors c241e14650 Auto merge of #136593 - lukas-code:ty-value-perf, r=oli-obk ... valtree performance tuning Summary: This PR makes type checking of code with many type-level constants faster. After https://github.com/rust-lang/rust/pull/136180 was merged, we observed a small perf regression (https://github.com/rust-lang/rust/pull/136318#issuecomment-2635562821). This happened because that PR introduced additional copies in the fast reject code path for consts, which is very hot for certain crates: 6c1d960d88/compiler/rustc_type_ir/src/fast_reject.rs (L486-L487) This PR improves the performance again by properly interning the valtrees so that copying and comparing them becomes faster. This will become especially useful with `feature(adt_const_params)`, so the fast reject code doesn't have to do a deep compare of the valtrees. Note that we can't just compare the interned consts themselves in the fast reject, because sometimes `'static` lifetimes in the type are be replaced with inference variables (due to canonicalization) on one side but not the other. A less invasive alternative that I considered is simply avoiding copies introduced by https://github.com/rust-lang/rust/pull/136180 and comparing the valtrees it in-place (see commit: 9e91e50ac5 / perf results: https://github.com/rust-lang/rust/pull/136593#issuecomment-2642303245), however that was still measurably slower than interning. There are some minor regressions in secondary benchmarks: These happen due to changes in memory allocations and seem acceptable to me. The crates that make heavy use of valtrees show no significant changes in memory usage.		2025-02-13 15:27:30 +00:00
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check	Auto merge of #136965 - jhpratt:rollup-bsnqvmf, r=jhpratt	2025-02-13 11:45:11 +00:00
coherence	Rollup merge of #136107 - dingxiangfei2009:coerce-pointee-wellformed, r=compiler-errors	2025-02-11 02:53:42 +01:00
collect	Rollup merge of #136806 - adwinwhite:cycle-in-pretty-print-rpitit, r=compiler-errors	2025-02-12 20:09:59 -05:00
errors	Use a different hir type for patterns in pattern types than we use in match patterns	2025-02-03 08:18:30 +00:00
hir_ty_lowering	Auto merge of #136593 - lukas-code:ty-value-perf, r=oli-obk	2025-02-13 15:27:30 +00:00
impl_wf_check	Fix a comment typo.	2025-01-31 08:28:14 +11:00
outlives	Remove an unnecessary loop label.	2025-01-31 08:28:28 +11:00
variance	Remove xform submodule.	2025-01-31 08:28:28 +11:00
autoderef.rs	Rename structurally_normalize to structurally_normalize_ty	2025-01-22 07:04:53 +00:00
bounds.rs	Merge HostPolarity and BoundConstness	2024-10-30 16:23:16 +00:00
check_unused.rs	Remove #[macro_use] extern crate tracing from rustc_hir_analysis.	2024-08-30 17:14:59 +10:00
collect.rs	Explain that in paths generics can't be set on both the enum and the variant	2025-02-11 23:30:07 +00:00
constrained_generic_params.rs	Remove #[macro_use] extern crate tracing from rustc_hir_analysis.	2024-08-30 17:14:59 +10:00
delegation.rs	Rustfmt	2025-02-08 22:12:13 +00:00
errors.rs	Implement lint for definition site item shadowing too	2025-02-13 05:45:53 +00:00
hir_wf_check.rs	visit_x_unambig	2025-01-23 06:01:36 +00:00
impl_wf_check.rs	Rename tcx.ensure() to tcx.ensure_ok()	2025-02-01 12:38:54 +11:00
lib.rs	Split out the extern_system_varargs feature	2025-02-12 19:57:45 -08:00