BrCond

        pub const BrCond = struct {
            cond: Value,
            then: Block.Index,
            @"else": Block.Index,
            weights: Weights,

            pub const Weights = enum(u32) {
                none = @bitCast(Metadata.Optional.none),
                unpredictable,
                _,

                pub fn fromMetadata(metadata: Metadata) Weights {
                    assert(metadata.kind == .node);
                    return @fromBackingInt(metadata.index);
                }

                pub fn toMetadata(weights: Weights) Metadata {
                    return .{ .index = @intCast(@backingInt(weights)), .kind = .node };
                }
            };
        }