Vulcan

Portable, self-hosted code generation. Vulcan lowers a small SSA IR to native machine code for several targets, with no LLVM dependency: its own register allocators, linker, and JIT.

Targets

• AArch64 (A64 + NEON): native JIT, ELF objects, linker, runnable ELF executables
• RISC-V (RV64 + RVV): ELF objects, linker, JIT
• x86-64 (SSE/SSE2 + AVX) and x86-32: ELF objects, linker, JIT
• NVIDIA SASS (compute and graphics): encoder and instruction selection
• Container formats: in-memory W^X JIT, ELF objects and executables, baremetal flat binaries, UEFI PE32+/COFF

Frontends

• WebAssembly (vulcan-wasm): Wasm to IR to JIT, as a host CLI or a UEFI boot application
• GLSL (vulcan-glsl): a GLSL to SPIR-V shader compiler
• SPIR-V (vulcan-spirv): bidirectional SPIR-V and IR

Optimization (vulcan-opt)

A pass manager with cached analyses (dominators, CFG, natural loops) driving constant folding, GVN/CSE, LICM, DCE, inter-procedural inlining, SLP auto-vectorization, and division lowering, plus link-time optimization (LTO) and profile-guided optimization (PGO).

Build

zig build                        # host CLIs: vulcan-wasm, vulcan-glsl
zig build test                   # run the test suite
zig build run-glsl  -- in.glsl   # compile GLSL to SPIR-V
zig build run-wasm  -- in.wasm   # JIT and run a Wasm module
zig build -Dtarget=x86_64-uefi   # build the UEFI boot application

Requires Zig 0.16. The Nix flake provides a dev shell with the toolchain (nix develop).