1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/optimization-fuel-1.rs b/tests/ui/optimization-fuel-1.rs
new file mode 100644
index 000000000..d5e2255d9
--- /dev/null
+++ b/tests/ui/optimization-fuel-1.rs
@@ -0,0 +1,18 @@
+// run-pass
+
+#![crate_name="foo"]
+
+use std::mem::size_of;
+
+// compile-flags: -Z fuel=foo=1
+
+#[allow(unused_tuple_struct_fields)]
+struct S1(u8, u16, u8);
+#[allow(unused_tuple_struct_fields)]
+struct S2(u8, u16, u8);
+
+fn main() {
+    let optimized = (size_of::<S1>() == 4) as usize
+        +(size_of::<S2>() == 4) as usize;
+    assert_eq!(optimized, 1);
+}