97d7fddfb7
Introduce `ResultLoc.none_or_ref` which is used by field access expressions to avoid unnecessary loads when the field access itself will do the load. This turns: ```zig p.y - p.x - p.x ``` from ```zir %14 = load(%4) node_offset:8:12 %15 = field_val(%14, "y") node_offset:8:13 %16 = load(%4) node_offset:8:18 %17 = field_val(%16, "x") node_offset:8:19 %18 = sub(%15, %17) node_offset:8:16 %19 = load(%4) node_offset:8:24 %20 = field_val(%19, "x") node_offset:8:25 ``` to ```zir %14 = field_val(%4, "y") node_offset:8:13 %15 = field_val(%4, "x") node_offset:8:19 %16 = sub(%14, %15) node_offset:8:16 %17 = field_val(%4, "x") node_offset:8:25 ``` Much more compact. This requires `Sema.zirFieldVal` to support both pointers and non-pointers. C backend: Implement typedefs for struct types, as well as the following TZIR instructions: * mul * mulwrap * addwrap * subwrap * ref * struct_field_ptr Note that add, addwrap, sub, subwrap, mul, mulwrap instructions are all incorrect currently and need to be updated to properly handle wrapping and non wrapping for signed and unsigned. C backend: change indentation delta to 1, to make the output smaller and to process fewer bytes. I promise I will add a test case as soon as I fix those warnings that are being printed for my test case.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
Resources
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- Chapter 0 - Getting Started | ZigLearn.org
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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.