Emit range metadata on calls returning scalars (fixes #50157)

src/test/codegen/call-metadata.rs

@@ -0,0 +1,29 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Checks that range metadata gets emitted on calls to functions returning a
+// scalar value.
+
+// compile-flags: -C no-prepopulate-passes
+// min-llvm-version 4.0
+
+
+#![crate_type = "lib"]
+
+pub fn test() {
+    // CHECK: call i8 @some_true(), !range [[R0:![0-9]+]]
+    // CHECK: [[R0]] = !{i8 0, i8 3}
+    some_true();
+}
+
+#[no_mangle]
+fn some_true() -> Option<bool> {
+    Some(true)
+}