Ensure we codegen and don't internalize the entrypoint

2 files changed, 14 insertions, 0 deletions

diff --git a/tests/ui/entry-point/auxiliary/main_functions.rs b/tests/ui/entry-point/auxiliary/main_functions.rs
index cc7992a42c1..ab4a09b6331 100644
--- a/tests/ui/entry-point/auxiliary/main_functions.rs
+++ b/tests/ui/entry-point/auxiliary/main_functions.rs
@@ -1 +1,4 @@
 pub fn boilerplate() {}
+
+#[inline]
+pub fn local_codegen() {}
diff --git a/tests/ui/entry-point/imported_main_local_codegen.rs b/tests/ui/entry-point/imported_main_local_codegen.rs
new file mode 100644
index 00000000000..1e46c109373
--- /dev/null
+++ b/tests/ui/entry-point/imported_main_local_codegen.rs
@@ -0,0 +1,11 @@
+//@ run-pass
+//@ aux-build:main_functions.rs
+//@ compile-flags: -Ccodegen-units=1024
+
+// This is a regression test for https://github.com/rust-lang/rust/issues/144052.
+// Entrypoint functions call each other in ways that CGU partitioning doesn't know about. So there
+// is a special check to not internalize any of them. But internalizing them can be okay if there
+// are few enough CGUs, so we use a lot of CGUs in this test to hit the bad case.
+
+extern crate main_functions;
+pub use main_functions::local_codegen as main;