Unify incremental test cases and disable many

The self-hosted aarch64 backend is not currently functional due to the
Liveness changes. A previous commit disabled aarch64 on the behavior
tests; this commit disables it and arm for the test cases. Moreover, all
incremental test cases have been unified into shared cross-platform
cases, which can be gradually enabled as the backends improve.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/cases/structs.1.zig b/test/cases/structs.1.zig
new file mode 100644
index 0000000000..8d4250e4a2
--- /dev/null
+++ b/test/cases/structs.1.zig
@@ -0,0 +1,10 @@
+const Example = struct { x: u8 };
+
+pub fn main() u8 {
+    var example: Example = .{ .x = 5 };
+    example.x = 10;
+    return example.x - 10;
+}
+
+// run
+//