1 files changed, 49 insertions, 0 deletions
diff --git a/src/test/incremental/spike.rs b/src/test/incremental/spike.rs
new file mode 100644
index 000000000..a6a05e7c3
--- /dev/null
+++ b/src/test/incremental/spike.rs
@@ -0,0 +1,49 @@
+// A first "spike" for incremental compilation: here, we change the
+// content of the `make` function, and we find that we can reuse the
+// `y` module entirely (but not the `x` module).
+
+// revisions:rpass1 rpass2
+// compile-flags: -Z query-dep-graph
+
+#![feature(rustc_attrs)]
+
+#![rustc_partition_reused(module="spike", cfg="rpass2")]
+#![rustc_partition_codegened(module="spike-x", cfg="rpass2")]
+#![rustc_partition_reused(module="spike-y", cfg="rpass2")]
+
+mod x {
+    pub struct X {
+        x: u32, y: u32,
+    }
+
+    #[cfg(rpass1)]
+    fn make() -> X {
+        X { x: 22, y: 0 }
+    }
+
+    #[cfg(rpass2)]
+    fn make() -> X {
+        X { x: 11, y: 11 }
+    }
+
+    pub fn new() -> X {
+        make()
+    }
+
+    pub fn sum(x: &X) -> u32 {
+        x.x + x.y
+    }
+}
+
+mod y {
+    use x;
+
+    pub fn assert_sum() -> bool {
+        let x = x::new();
+        x::sum(&x) == 22
+    }
+}
+
+pub fn main() {
+    y::assert_sum();
+}