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Auto merge of #108020 - nnethercote:opt-mk_region, r=compiler-errors

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Optimize `mk_region`

PR #107869 avoiding some interning under `mk_ty` by special-casing `Ty` variants with simple (integer) bodies. This PR does something similar for regions.

r? `@compiler-errors`
This commit is contained in:
bors
2023-02-16 16:11:54 +00:00
parent af3c8b2726 9a53cee868
commit c5d1b3ea96
40 changed files with 254 additions and 186 deletions
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12
compiler/rustc_infer/src/infer/error_reporting/nice_region_error/placeholder_error.rs
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@@ -14,7 +14,7 @@ use rustc_hir::def_id::DefId;
use rustc_middle::ty::error::ExpectedFound;
use rustc_middle::ty::print::{FmtPrinter, Print, RegionHighlightMode};
use rustc_middle::ty::subst::SubstsRef;
use rustc_middle::ty::{self, RePlaceholder, ReVar, Region, TyCtxt};
use rustc_middle::ty::{self, RePlaceholder, Region, TyCtxt};
use std::fmt;
@@ -79,7 +79,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
sup_placeholder @ Region(Interned(RePlaceholder(_), _)),
_,
)) => self.try_report_trait_placeholder_mismatch(
Some(self.tcx().mk_region(ReVar(*vid))),
Some(self.tcx().mk_re_var(*vid)),
cause,
Some(*sub_placeholder),
Some(*sup_placeholder),
@@ -95,7 +95,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
_,
_,
)) => self.try_report_trait_placeholder_mismatch(
Some(self.tcx().mk_region(ReVar(*vid))),
Some(self.tcx().mk_re_var(*vid)),
cause,
Some(*sub_placeholder),
None,
@@ -111,7 +111,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
sup_placeholder @ Region(Interned(RePlaceholder(_), _)),
_,
)) => self.try_report_trait_placeholder_mismatch(
Some(self.tcx().mk_region(ReVar(*vid))),
Some(self.tcx().mk_re_var(*vid)),
cause,
None,
Some(*sup_placeholder),
@@ -127,7 +127,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
sup_placeholder @ Region(Interned(RePlaceholder(_), _)),
_,
)) => self.try_report_trait_placeholder_mismatch(
Some(self.tcx().mk_region(ReVar(*vid))),
Some(self.tcx().mk_re_var(*vid)),
cause,
None,
Some(*sup_placeholder),
@@ -141,7 +141,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
SubregionOrigin::Subtype(box TypeTrace { cause, values }),
sup_placeholder @ Region(Interned(RePlaceholder(_), _)),
)) => self.try_report_trait_placeholder_mismatch(
Some(self.tcx().mk_region(ReVar(*vid))),
Some(self.tcx().mk_re_var(*vid)),
cause,
None,
Some(*sup_placeholder),