1 files changed, 31 insertions, 0 deletions
diff --git a/tests/codegen-llvm/vec-shrink-panik.rs b/tests/codegen-llvm/vec-shrink-panik.rs
new file mode 100644
index 00000000000..23dd300d48c
--- /dev/null
+++ b/tests/codegen-llvm/vec-shrink-panik.rs
@@ -0,0 +1,31 @@
+// LLVM 17 realizes double panic is not possible and doesn't generate calls
+// to panic_cannot_unwind.
+//@ compile-flags: -Copt-level=3
+//@ ignore-std-debug-assertions (plain old debug assertions)
+//@ needs-unwind
+#![crate_type = "lib"]
+#![feature(shrink_to)]
+
+// Make sure that `Vec::shrink_to_fit` never emits panics via `RawVec::shrink_to_fit`,
+// "Tried to shrink to a larger capacity", because the length is *always* <= capacity.
+
+// CHECK-LABEL: @shrink_to_fit
+#[no_mangle]
+pub fn shrink_to_fit(vec: &mut Vec<u32>) {
+    // CHECK-NOT: panic
+    vec.shrink_to_fit();
+}
+
+// CHECK-LABEL: @issue71861
+#[no_mangle]
+pub fn issue71861(vec: Vec<u32>) -> Box<[u32]> {
+    // CHECK-NOT: panic
+    vec.into_boxed_slice()
+}
+
+// CHECK-LABEL: @issue75636
+#[no_mangle]
+pub fn issue75636<'a>(iter: &[&'a str]) -> Box<[&'a str]> {
+    // CHECK-NOT: panic
+    iter.iter().copied().collect()
+}