zig

commit 8a0429e885489eac497aa97fdfcaaa1befb2b6d4 (tree)
parent 20abf1394aef44eb1882e801f1d729fcff452db3
Author: Meghan Denny <hello@nektro.net>
Date:   Fri, 26 Jan 2024 05:26:37 -0800

test: add behavior coverage for global setter in function liveness


Diffstat:
M
test/behavior/globals.zig
 | 
26
++++++++++++++++++++++++++

1 file changed, 26 insertions(+), 0 deletions(-)
diff --git a/test/behavior/globals.zig b/test/behavior/globals.zig
@@ -46,3 +46,29 @@ test "slices pointing at the same address as global array." {
     try S.checkAddress(&S.a);
     try comptime S.checkAddress(&S.a);
 }
+
+test "global loads can affect liveness" {
+    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
+
+    const S = struct {
+        const ByRef = struct {
+            a: u32,
+        };
+
+        var global_ptr: *ByRef = undefined;
+
+        fn f() void {
+            global_ptr.* = .{ .a = 42 };
+        }
+    };
+
+    var x: S.ByRef = .{ .a = 1 };
+    S.global_ptr = &x;
+    const y = x;
+    S.f();
+    try std.testing.expect(y.a == 1);
+}