Auto merge of #46916 - michaelwoerister:generate-dead-code-plz, r=alexcrichton

Generate code for unused const- and inline-fns if -Clink-dead-code is specified.

Fixes https://github.com/rust-lang/rust/issues/46467.

r? @alexcrichton

1 files changed, 27 insertions, 0 deletions

diff --git a/src/test/codegen/link-dead-code.rs b/src/test/codegen/link-dead-code.rs
new file mode 100644
index 00000000000..9cabcd9157a
--- /dev/null
+++ b/src/test/codegen/link-dead-code.rs
@@ -0,0 +1,27 @@
+// Copyright 2017 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.
+
+// compile-flags:-Clink-dead-code
+
+#![feature(const_fn)]
+#![crate_type = "rlib"]
+
+// This test makes sure that, when -Clink-dead-code is specified, we generate
+// code for functions that would otherwise be skipped.
+
+// CHECK-LABEL: define hidden i32 @_ZN14link_dead_code8const_fn
+const fn const_fn() -> i32 { 1 }
+
+// CHECK-LABEL: define hidden i32 @_ZN14link_dead_code9inline_fn
+#[inline]
+fn inline_fn() -> i32 { 2 }
+
+// CHECK-LABEL: define hidden i32 @_ZN14link_dead_code10private_fn
+fn private_fn() -> i32 { 3 }