1 files changed, 74 insertions, 0 deletions
diff --git a/tests/codegen/array-equality.rs b/tests/codegen/array-equality.rs
new file mode 100644
index 000000000..cd5e82a92
--- /dev/null
+++ b/tests/codegen/array-equality.rs
@@ -0,0 +1,74 @@
+// compile-flags: -O
+// only-x86_64
+
+#![crate_type = "lib"]
+
+// CHECK-LABEL: @array_eq_value
+#[no_mangle]
+pub fn array_eq_value(a: [u16; 3], b: [u16; 3]) -> bool {
+    // CHECK-NEXT: start:
+    // CHECK-NEXT: %2 = icmp eq i48 %0, %1
+    // CHECK-NEXT: ret i1 %2
+    a == b
+}
+
+// CHECK-LABEL: @array_eq_ref
+#[no_mangle]
+pub fn array_eq_ref(a: &[u16; 3], b: &[u16; 3]) -> bool {
+    // CHECK: start:
+    // CHECK: load i48, {{i48\*|ptr}} %{{.+}}, align 2
+    // CHECK: load i48, {{i48\*|ptr}} %{{.+}}, align 2
+    // CHECK: icmp eq i48
+    // CHECK-NEXT: ret
+    a == b
+}
+
+// CHECK-LABEL: @array_eq_value_still_passed_by_pointer
+#[no_mangle]
+pub fn array_eq_value_still_passed_by_pointer(a: [u16; 9], b: [u16; 9]) -> bool {
+    // CHECK-NEXT: start:
+    // CHECK: %[[CMP:.+]] = tail call i32 @{{bcmp|memcmp}}({{i8\*|ptr}} {{.*}} dereferenceable(18) %{{.+}}, {{i8\*|ptr}} {{.*}} dereferenceable(18) %{{.+}}, i64 18)
+    // CHECK-NEXT: %[[EQ:.+]] = icmp eq i32 %[[CMP]], 0
+    // CHECK-NEXT: ret i1 %[[EQ]]
+    a == b
+}
+
+// CHECK-LABEL: @array_eq_long
+#[no_mangle]
+pub fn array_eq_long(a: &[u16; 1234], b: &[u16; 1234]) -> bool {
+    // CHECK-NEXT: start:
+    // CHECK: %[[CMP:.+]] = tail call i32 @{{bcmp|memcmp}}({{i8\*|ptr}} {{.*}} dereferenceable(2468) %{{.+}}, {{i8\*|ptr}} {{.*}} dereferenceable(2468) %{{.+}}, i64 2468)
+    // CHECK-NEXT: %[[EQ:.+]] = icmp eq i32 %[[CMP]], 0
+    // CHECK-NEXT: ret i1 %[[EQ]]
+    a == b
+}
+
+// CHECK-LABEL: @array_eq_zero_short(i48
+#[no_mangle]
+pub fn array_eq_zero_short(x: [u16; 3]) -> bool {
+    // CHECK-NEXT: start:
+    // CHECK-NEXT: %[[EQ:.+]] = icmp eq i48 %0, 0
+    // CHECK-NEXT: ret i1 %[[EQ]]
+    x == [0; 3]
+}
+
+// CHECK-LABEL: @array_eq_zero_mid(
+#[no_mangle]
+pub fn array_eq_zero_mid(x: [u16; 8]) -> bool {
+    // CHECK-NEXT: start:
+    // CHECK: %[[LOAD:.+]] = load i128,
+    // CHECK-NEXT: %[[EQ:.+]] = icmp eq i128 %[[LOAD]], 0
+    // CHECK-NEXT: ret i1 %[[EQ]]
+    x == [0; 8]
+}
+
+// CHECK-LABEL: @array_eq_zero_long(
+#[no_mangle]
+pub fn array_eq_zero_long(x: [u16; 1234]) -> bool {
+    // CHECK-NEXT: start:
+    // CHECK-NOT: alloca
+    // CHECK: %[[CMP:.+]] = tail call i32 @{{bcmp|memcmp}}(
+    // CHECK-NEXT: %[[EQ:.+]] = icmp eq i32 %[[CMP]], 0
+    // CHECK-NEXT: ret i1 %[[EQ]]
+    x == [0; 1234]
+}