block

pub fn block(self: *WipFunction, incoming: u32, name: []const u8) Allocator.Error!Block.Index {
    try self.blocks.ensureUnusedCapacity(self.builder.gpa, 1);

    const index: Block.Index = @enumFromInt(self.blocks.items.len);
    const final_name = if (self.strip) .empty else try self.builder.string(name);
    self.blocks.appendAssumeCapacity(.{
        .name = final_name,
        .incoming = incoming,
        .instructions = .{},
    });
    return index;
}