1 files changed, 37 insertions, 0 deletions
diff --git a/tests/mir-opt/pre-codegen/loops.rs b/tests/mir-opt/pre-codegen/loops.rs
new file mode 100644
index 000000000..67f549a51
--- /dev/null
+++ b/tests/mir-opt/pre-codegen/loops.rs
@@ -0,0 +1,37 @@
+// compile-flags: -O -Zmir-opt-level=2 -g
+// needs-unwind
+// ignore-debug
+
+#![crate_type = "lib"]
+
+pub fn int_range(start: usize, end: usize) {
+    for i in start..end {
+        opaque(i)
+    }
+}
+
+pub fn mapped<T, U>(iter: impl Iterator<Item = T>, f: impl Fn(T) -> U) {
+    for x in iter.map(f) {
+        opaque(x)
+    }
+}
+
+pub fn filter_mapped<T, U>(iter: impl Iterator<Item = T>, f: impl Fn(T) -> Option<U>) {
+    for x in iter.filter_map(f) {
+        opaque(x)
+    }
+}
+
+pub fn vec_move(mut v: Vec<impl Sized>) {
+    for x in v {
+        opaque(x)
+    }
+}
+
+#[inline(never)]
+fn opaque(_: impl Sized) {}
+
+// EMIT_MIR loops.int_range.PreCodegen.after.mir
+// EMIT_MIR loops.mapped.PreCodegen.after.mir
+// EMIT_MIR loops.filter_mapped.PreCodegen.after.mir
+// EMIT_MIR loops.vec_move.PreCodegen.after.mir