1 files changed, 87 insertions, 0 deletions
diff --git a/tests/mir-opt/inline/exponential_runtime.rs b/tests/mir-opt/inline/exponential_runtime.rs
new file mode 100644
index 00000000000..d9219d76a98
--- /dev/null
+++ b/tests/mir-opt/inline/exponential_runtime.rs
@@ -0,0 +1,87 @@
+// Checks that code with exponential runtime does not have exponential behavior in inlining.
+
+trait A {
+    fn call();
+}
+
+trait B {
+    fn call();
+}
+impl<T: A> B for T {
+    #[inline]
+    fn call() {
+        <T as A>::call();
+        <T as A>::call();
+        <T as A>::call();
+    }
+}
+
+trait C {
+    fn call();
+}
+impl<T: B> C for T {
+    #[inline]
+    fn call() {
+        <T as B>::call();
+        <T as B>::call();
+        <T as B>::call();
+    }
+}
+
+trait D {
+    fn call();
+}
+impl<T: C> D for T {
+    #[inline]
+    fn call() {
+        <T as C>::call();
+        <T as C>::call();
+        <T as C>::call();
+    }
+}
+
+trait E {
+    fn call();
+}
+impl<T: D> E for T {
+    #[inline]
+    fn call() {
+        <T as D>::call();
+        <T as D>::call();
+        <T as D>::call();
+    }
+}
+
+trait F {
+    fn call();
+}
+impl<T: E> F for T {
+    #[inline]
+    fn call() {
+        <T as E>::call();
+        <T as E>::call();
+        <T as E>::call();
+    }
+}
+
+trait G {
+    fn call();
+}
+impl<T: F> G for T {
+    #[inline]
+    fn call() {
+        <T as F>::call();
+        <T as F>::call();
+        <T as F>::call();
+    }
+}
+
+impl A for () {
+    #[inline(never)]
+    fn call() {}
+}
+
+// EMIT_MIR exponential_runtime.main.Inline.diff
+fn main() {
+    <() as G>::call();
+}