1 files changed, 47 insertions, 0 deletions
diff --git a/tests/codegen-llvm/naked-fn/min-function-alignment.rs b/tests/codegen-llvm/naked-fn/min-function-alignment.rs
new file mode 100644
index 00000000000..406e9334fa5
--- /dev/null
+++ b/tests/codegen-llvm/naked-fn/min-function-alignment.rs
@@ -0,0 +1,47 @@
+//@ compile-flags: -C no-prepopulate-passes -Copt-level=0 -Zmin-function-alignment=16
+//@ needs-asm-support
+//@ ignore-arm no "ret" mnemonic
+//@ ignore-wasm32 aligning functions is not currently supported on wasm (#143368)
+
+// FIXME(#82232, #143834): temporarily renamed to mitigate `#[align]` nameres ambiguity
+#![feature(rustc_attrs)]
+#![feature(fn_align)]
+#![crate_type = "lib"]
+
+// functions without explicit alignment use the global minimum
+//
+// CHECK: .balign 16
+#[no_mangle]
+#[unsafe(naked)]
+pub extern "C" fn naked_no_explicit_align() {
+    core::arch::naked_asm!("ret")
+}
+
+// CHECK: .balign 16
+#[no_mangle]
+#[rustc_align(8)]
+#[unsafe(naked)]
+pub extern "C" fn naked_lower_align() {
+    core::arch::naked_asm!("ret")
+}
+
+// CHECK: .balign 32
+#[no_mangle]
+#[rustc_align(32)]
+#[unsafe(naked)]
+pub extern "C" fn naked_higher_align() {
+    core::arch::naked_asm!("ret")
+}
+
+// cold functions follow the same rules as other functions
+//
+// in GCC, the `-falign-functions` does not apply to cold functions, but
+// `-Zmin-function-alignment` applies to all functions.
+//
+// CHECK: .balign 16
+#[no_mangle]
+#[cold]
+#[unsafe(naked)]
+pub extern "C" fn no_explicit_align_cold() {
+    core::arch::naked_asm!("ret")
+}