zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software. https://ziglang.org

Age	Commit message (Collapse)	Author
2025-11-12	Air.Legalize: revert to loops for scalarizations	Matthew Lugg
	I had tried unrolling the loops to avoid requiring the `vector_store_elem` instruction, but it's arguably a problem to generate O(N) code for an operation on `@Vector(N, T)`. In addition, that lowering emitted a lot of `.aggregate_init` instructions, which is itself a quite difficult operation to codegen. This requires reintroducing runtime vector indexing internally. However, I've put it in a couple of instructions which are intended only for use by `Air.Legalize`, named `legalize_vec_elem_val` (like `array_elem_val`, but for indexing a vector with a runtime-known index) and `legalize_vec_store_elem` (like the old `vector_store_elem` instruction). These are explicitly documented as not being emitted by Sema, so need only be implemented by backends if they actually use an `Air.Legalize.Feature` which emits them (otherwise they can be marked as `unreachable`).
2025-11-12	compiler: spring cleaning	Matthew Lugg
	I started this diff trying to remove a little dead code from the C backend, but ended up finding a bunch of dead code sprinkled all over the place: * `packed` handling in the C backend which was made dead by `Legalize` * Representation of pointers to runtime-known vector indices * Handling for the `vector_store_elem` AIR instruction (now removed) * Old tuple handling from when they used the InternPool repr of structs * Straightforward unused functions * TODOs in the LLVM backend for features which Zig just does not support
2025-09-26	compiler: move self-hosted backends from src/arch to src/codegen	Alex Rønne Petersen