diff options
| -rw-r--r-- | src/type.zig | 12 | ||||
| -rw-r--r-- | test/cases/compile_errors/bitsize_of_packed_struct_checks_backing_int_ty.zig | 13 |
2 files changed, 18 insertions, 7 deletions
diff --git a/src/type.zig b/src/type.zig index 605e4396c0..3dc9202917 100644 --- a/src/type.zig +++ b/src/type.zig @@ -3574,15 +3574,13 @@ pub const Type = extern union { .u128, .i128, .f128 => return 128, .@"struct" => { - if (sema_kit) |sk| _ = try sk.sema.resolveTypeFields(sk.block, sk.src, ty); - if (ty.containerLayout() != .Packed) { + const struct_obj = ty.castTag(.@"struct").?.data; + if (struct_obj.layout != .Packed) { return (try ty.abiSizeAdvanced(target, if (sema_kit) |sk| .{ .sema_kit = sk } else .eager)).scalar * 8; } - var total: u64 = 0; - for (ty.structFields().values()) |field| { - total += try bitSizeAdvanced(field.ty, target, sema_kit); - } - return total; + if (sema_kit) |sk| _ = try sk.sema.resolveTypeLayout(sk.block, sk.src, ty); + assert(struct_obj.haveLayout()); + return try struct_obj.backing_int_ty.bitSizeAdvanced(target, sema_kit); }, .tuple, .anon_struct => { diff --git a/test/cases/compile_errors/bitsize_of_packed_struct_checks_backing_int_ty.zig b/test/cases/compile_errors/bitsize_of_packed_struct_checks_backing_int_ty.zig new file mode 100644 index 0000000000..774a9c3376 --- /dev/null +++ b/test/cases/compile_errors/bitsize_of_packed_struct_checks_backing_int_ty.zig @@ -0,0 +1,13 @@ +const Foo = packed struct(u32) { + x: u1, +}; +fn bar(_: Foo) callconv(.C) void {} +pub export fn entry() void { + bar(.{ .x = 0 }); +} + +// error +// backend=stage2 +// target=native +// +// :1:27: error: backing integer type 'u32' has bit size 32 but the struct fields have a total bit size of 1 |