1 files changed, 20 insertions, 0 deletions
diff --git a/tests/assembly-llvm/x86_64-array-pair-load-store-merge.rs b/tests/assembly-llvm/x86_64-array-pair-load-store-merge.rs
new file mode 100644
index 00000000000..56a1a9e8206
--- /dev/null
+++ b/tests/assembly-llvm/x86_64-array-pair-load-store-merge.rs
@@ -0,0 +1,20 @@
+//@ assembly-output: emit-asm
+//@ compile-flags: --crate-type=lib -Copt-level=3 -C llvm-args=-x86-asm-syntax=intel
+//@ only-x86_64
+//@ ignore-sgx
+//@ ignore-apple (manipulates rsp too)
+
+// Depending on various codegen choices, this might end up copying
+// a `<2 x i8>`, an `i16`, or two `i8`s.
+// Regardless of those choices, make sure the instructions use (2-byte) words.
+
+// CHECK-LABEL: array_copy_2_elements:
+#[no_mangle]
+pub fn array_copy_2_elements(a: &[u8; 2], p: &mut [u8; 2]) {
+    // CHECK-NOT: byte
+    // CHECK-NOT: mov
+    // CHECK: mov{{.+}}, word ptr
+    // CHECK-NEXT: mov word ptr
+    // CHECK-NEXT: ret
+    *p = *a;
+}