From 4547b622d8d29df964fa2914213088b148c498fc Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:18:32 +0200
Subject: Merging upstream version 1.67.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/test/mir-opt/inline/polymorphic_recursion.rs | 25 ++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 src/test/mir-opt/inline/polymorphic_recursion.rs

(limited to 'src/test/mir-opt/inline/polymorphic_recursion.rs')

diff --git a/src/test/mir-opt/inline/polymorphic_recursion.rs b/src/test/mir-opt/inline/polymorphic_recursion.rs
new file mode 100644
index 000000000..7388722b7
--- /dev/null
+++ b/src/test/mir-opt/inline/polymorphic_recursion.rs
@@ -0,0 +1,25 @@
+// Make sure that the MIR inliner does not loop indefinitely on polymorphic recursion.
+// compile-flags: --crate-type lib
+
+// Randomize `def_path_hash` by defining them under a module with different names
+macro_rules! emit {
+    ($($m:ident)*) => {$(
+        pub mod $m {
+            pub trait Tr { type Next: Tr; }
+
+            pub fn hoge<const N: usize, T: Tr>() {
+                inner::<N, T>();
+            }
+
+            #[inline(always)]
+            fn inner<const N: usize, T: Tr>()
+            {
+                inner::<N, T::Next>();
+                inner::<N, T::Next>();
+            }
+        }
+    )*};
+}
+
+// Increase the chance of triggering the bug
+emit!(m00 m01 m02 m03 m04 m05 m06 m07 m08 m09 m10 m11 m12 m13 m14 m15 m16 m17 m18 m19);
-- 
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