Skip to content
Permalink

Comparing changes

Choose two branches to see what’s changed or to start a new pull request. If you need to, you can also or learn more about diff comparisons.

Open a pull request

Create a new pull request by comparing changes across two branches. If you need to, you can also . Learn more about diff comparisons here.
base repository: rust-lang/rust
Failed to load repositories. Confirm that selected base ref is valid, then try again.
Loading
base: master
Choose a base ref
...
head repository: compiler-errors/rust
Failed to load repositories. Confirm that selected head ref is valid, then try again.
Loading
compare: perf-instantiate-noop
Choose a head ref
  • 1 commit
  • 1 file changed
  • 1 contributor

Commits on Jun 10, 2025

  1. Don't fold in Instantiate when there's nothing to fold

    @compiler-errors
    compiler-errors committed Jun 10, 2025
    Copy the full SHA
    cbd67db View commit details
Showing with 4 additions and 0 deletions.
  1. +4 −0 compiler/rustc_type_ir/src/binder.rs
4 changes: 4 additions & 0 deletions compiler/rustc_type_ir/src/binder.rs
View file
Original file line number Diff line number Diff line change
@@ -622,6 +622,10 @@ impl<I: Interner, T: TypeFoldable<I>> ty::EarlyBinder<I, T> {
where
A: SliceLike<Item = I::GenericArg>,
{
// Nothing to fold.
if !cfg!(debug_assertions) && args.is_empty() {
return self.value;
}
let mut folder = ArgFolder { cx, args: args.as_slice(), binders_passed: 0 };
self.value.fold_with(&mut folder)
}