2 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/consts/const-eval/auxiliary/post_monomorphization_error.rs b/tests/ui/consts/const-eval/auxiliary/post_monomorphization_error.rs
new file mode 100644
index 000000000..bdeaa0cd3
--- /dev/null
+++ b/tests/ui/consts/const-eval/auxiliary/post_monomorphization_error.rs
@@ -0,0 +1,20 @@
+// Auxiliary crate used for testing post-monomorphization errors cross-crate.
+// It duplicates the setup used in `stdarch` to validate its intrinsics' const arguments.
+
+struct ValidateConstImm<const IMM: i32, const MIN: i32, const MAX: i32>;
+impl<const IMM: i32, const MIN: i32, const MAX: i32> ValidateConstImm<IMM, MIN, MAX> {
+    pub(crate) const VALID: () = {
+        let _ = 1 / ((IMM >= MIN && IMM <= MAX) as usize);
+    };
+}
+
+macro_rules! static_assert_imm1 {
+    ($imm:ident) => {
+        let _ = $crate::ValidateConstImm::<$imm, 0, { (1 << 1) - 1 }>::VALID;
+    };
+}
+
+// This function triggers an error whenever the const argument does not fit in 1-bit.
+pub fn stdarch_intrinsic<const IMM1: i32>() {
+    static_assert_imm1!(IMM1);
+}
diff --git a/tests/ui/consts/const-eval/auxiliary/stability.rs b/tests/ui/consts/const-eval/auxiliary/stability.rs
new file mode 100644
index 000000000..e61595518
--- /dev/null
+++ b/tests/ui/consts/const-eval/auxiliary/stability.rs
@@ -0,0 +1,10 @@
+// Crate that exports a const fn. Used for testing cross-crate.
+
+#![crate_type="rlib"]
+#![stable(feature = "rust1", since = "1.0.0")]
+
+#![feature(staged_api)]
+
+#[stable(feature = "rust1", since = "1.0.0")]
+#[rustc_const_unstable(feature="foo", issue = "none")]
+pub const fn foo() -> u32 { 42 }