1 files changed, 20 insertions, 0 deletions
diff --git a/tests/mir-opt/coverage_graphviz.rs b/tests/mir-opt/coverage_graphviz.rs
new file mode 100644
index 000000000..09403bb3a
--- /dev/null
+++ b/tests/mir-opt/coverage_graphviz.rs
@@ -0,0 +1,20 @@
+// Test that `-C instrument-coverage` with `-Z dump-mir-graphviz` generates a graphviz (.dot file)
+// rendering of the `BasicCoverageBlock` coverage control flow graph, with counters and
+// expressions.
+
+// needs-profiler-support
+// compile-flags: -C instrument-coverage -Z dump-mir-graphviz
+// EMIT_MIR coverage_graphviz.main.InstrumentCoverage.0.dot
+// EMIT_MIR coverage_graphviz.bar.InstrumentCoverage.0.dot
+fn main() {
+    loop {
+        if bar() {
+            break;
+        }
+    }
+}
+
+#[inline(never)]
+fn bar() -> bool {
+    true
+}