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We now calculate the total stack size required for the current frame. The default alignment of the stack is 16 bytes, and will be overwritten when the alignment of a given type is larger than that. After we have generated all instructions for the body, we calculate the total stack size by forward aligning the stack size while accounting for the max alignment. We then insert a prologue into the body, where we substract this size from the stack pointer and save it inside a bottom stackframe local. We use this local then, to calculate the stack pointer locals of all variables we allocate into the stack. In a future iteration we can improve this further by storing the offsets as a new `stack_offset` `WValue`. This has the benefit of not having to spend runtime cost of storing those offsets, but instead we append those offsets whenever we need the value that lives in the stack.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
Resources
- Introduction
- Download & Documentation
- Chapter 0 - Getting Started | ZigLearn.org
- Community
- Contributing
- Code of Conduct
- Frequently Asked Questions
- Community Projects
Installation
- download a pre-built binary
- install from a package manager
- build from source
- bootstrap zig for any target
License
The ultimate goal of the Zig project is to serve users. As a first-order effect, this means users of the compiler, helping programmers to write better software. Even more important, however, are the end-users.
Zig is intended to be used to help end-users accomplish their goals. Zig should be used to empower end-users, never to exploit them financially, or to limit their freedom to interact with hardware or software in any way.
However, such problems are best solved with social norms, not with software licenses. Any attempt to complicate the software license of Zig would risk compromising the value Zig provides.
Therefore, Zig is available under the MIT (Expat) License, and comes with a humble request: use it to make software better serve the needs of end-users.
This project redistributes code from other projects, some of which have other licenses besides MIT. Such licenses are generally similar to the MIT license for practical purposes. See the subdirectories and files inside lib/ for more details.