Auto merge of #121387 - oli-obk:eager_const_failures_regression, r=lcnr

Avoid some unnecessary query invocations.

Specifically this inlines `const_eval_poly` and avoids computing the generic params, the param env, normalizing the param env and erasing lifetimes on everything.

should fix the perf regression from https://github.com/rust-lang/rust/pull/121087

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/ui/generic-const-items/hkl_where_bounds.rs b/tests/ui/generic-const-items/hkl_where_bounds.rs
new file mode 100644
index 00000000000..cded518312a
--- /dev/null
+++ b/tests/ui/generic-const-items/hkl_where_bounds.rs
@@ -0,0 +1,14 @@
+//! Test that nonsense bounds prevent consts from being evaluated at all.
+//@ check-pass
+
+#![feature(generic_const_items)]
+#![allow(incomplete_features)]
+trait Trait {
+    const ASSOC: u32;
+}
+
+// rustfmt eats the where bound
+#[rustfmt::skip]
+const ASSOC: u32 = <&'static ()>::ASSOC where for<'a> &'a (): Trait;
+
+fn main() {}