1 files changed, 40 insertions, 0 deletions
diff --git a/tests/mir-opt/lower_array_len.rs b/tests/mir-opt/lower_array_len.rs
new file mode 100644
index 000000000..ea0224b21
--- /dev/null
+++ b/tests/mir-opt/lower_array_len.rs
@@ -0,0 +1,40 @@
+// unit-test: NormalizeArrayLen
+// compile-flags: -Zmir-enable-passes=+LowerSliceLenCalls
+
+// EMIT_MIR lower_array_len.array_bound.NormalizeArrayLen.diff
+pub fn array_bound<const N: usize>(index: usize, slice: &[u8; N]) -> u8 {
+    if index < slice.len() {
+        slice[index]
+    } else {
+        42
+    }
+}
+
+// EMIT_MIR lower_array_len.array_bound_mut.NormalizeArrayLen.diff
+pub fn array_bound_mut<const N: usize>(index: usize, slice: &mut [u8; N]) -> u8 {
+    if index < slice.len() {
+        slice[index]
+    } else {
+        slice[0] = 42;
+
+        42
+    }
+}
+
+// EMIT_MIR lower_array_len.array_len.NormalizeArrayLen.diff
+pub fn array_len<const N: usize>(arr: &[u8; N]) -> usize {
+    arr.len()
+}
+
+// EMIT_MIR lower_array_len.array_len_by_value.NormalizeArrayLen.diff
+pub fn array_len_by_value<const N: usize>(arr: [u8; N]) -> usize {
+    arr.len()
+}
+
+fn main() {
+    let _ = array_bound(3, &[0, 1, 2, 3]);
+    let mut tmp = [0, 1, 2, 3, 4];
+    let _ = array_bound_mut(3, &mut [0, 1, 2, 3]);
+    let _ = array_len(&[0]);
+    let _ = array_len_by_value([0, 2]);
+}