Sema: only do store_ptr tuple optimization for arrays

Check the big comment in the diff for more details.
Fixes default-initialization of structs from empty struct literals.

1 files changed, 9 insertions, 0 deletions

diff --git a/test/behavior/struct.zig b/test/behavior/struct.zig
index abd24967bb..8383b81cd5 100644
--- a/test/behavior/struct.zig
+++ b/test/behavior/struct.zig
@@ -1281,3 +1281,12 @@ test "typed init through error unions and optionals" {
     try S.doTheTest();
     comptime try S.doTheTest();
 }
+
+test "initialize struct with empty literal" {
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+
+    const S = struct { x: i32 = 1234 };
+    var s: S = .{};
+    try expect(s.x == 1234);
+}