1 files changed, 35 insertions, 0 deletions
diff --git a/tests/codegen-llvm/stores.rs b/tests/codegen-llvm/stores.rs
new file mode 100644
index 00000000000..aa3090db6d3
--- /dev/null
+++ b/tests/codegen-llvm/stores.rs
@@ -0,0 +1,35 @@
+//@ compile-flags: -C no-prepopulate-passes
+//
+
+#![crate_type = "lib"]
+
+pub struct Bytes {
+    a: u8,
+    b: u8,
+    c: u8,
+    d: u8,
+}
+
+// CHECK-LABEL: small_array_alignment
+// The array is stored as i32, but its alignment is lower, go with 1 byte to avoid target
+// dependent alignment
+#[no_mangle]
+pub fn small_array_alignment(x: &mut [i8; 4], y: [i8; 4]) {
+    // CHECK: [[TMP:%.+]] = alloca [4 x i8], align 4
+    // CHECK: %y = alloca [4 x i8], align 1
+    // CHECK: store i32 %0, ptr [[TMP]]
+    // CHECK: call void @llvm.memcpy.{{.*}}(ptr align 1 {{.+}}, ptr align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
+    *x = y;
+}
+
+// CHECK-LABEL: small_struct_alignment
+// The struct is stored as i32, but its alignment is lower, go with 1 byte to avoid target
+// dependent alignment
+#[no_mangle]
+pub fn small_struct_alignment(x: &mut Bytes, y: Bytes) {
+    // CHECK: [[TMP:%.+]] = alloca [4 x i8], align 4
+    // CHECK: %y = alloca [4 x i8], align 1
+    // CHECK: store i32 %0, ptr [[TMP]]
+    // CHECK: call void @llvm.memcpy.{{.*}}(ptr align 1 {{.+}}, ptr align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
+    *x = y;
+}