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add behavior test for recently fixed wasm backend bug

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Adds the corresponding behavior test for the fix in
320c4d68f5f40794ae31d5535de9c3a8ff5cb471.
This commit is contained in:
Andrew Kelley 2024-02-11 14:14:59 -07:00
parent d40b71a39f
commit 616f74ba20
1 changed files with 29 additions and 0 deletions
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29
test/behavior/packed-struct.zig
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@ -1248,3 +1248,32 @@ test "bitcasting a packed struct at comptime and using the result" {
_ = Struct.bitcast(@as(u64, 0)).cannotReach();
}
}
test "2-byte packed struct argument in C calling convention" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
const S = packed struct(u16) {
x: u15 = 0,
y: u1 = 0,
fn foo(s: @This()) callconv(.C) i32 {
return s.x;
}
fn bar(s: @This()) !void {
try expect(foo(s) == 1);
}
};
{
var s: S = .{};
s.x += 1;
try S.bar(s);
}
comptime {
var s: S = .{};
s.x += 1;
try S.bar(s);
}
}