llama

A friendly LLVM library for Rust.

Goals: - Support the latest llvm-sys release (as of LLVM 14 and llama 0.14.0 the version numbers match) - Provide an improved interface, while still remaining as close as possible to the LLVM C API.

Due to the size of the LLVM API there is bound to be missing, broken or incomplete functionality in llama, please create an issue if something you need isn't implemented.

NOTE: llama will let you generate invalid IR, take a look at inkwell for LLVM bindings with a focus on type-safety

Documentation

• llama
• llama-build

Examples

Inkwell's example using llama:

```rust use llama::*;

// Convenience type alias for the sum function. // // Calling this is innately unsafe because there's no guarantee it doesn't // do unsafe operations internally. type SumFunc = unsafe extern "C" fn(u64, u64, u64) -> u64;

// Context should be last to perform cleanup in the correct order struct CodeGen<'ctx> { engine: ExecutionEngine<'ctx>, build: Builder<'ctx>, context: Context<'ctx>, }

impl<'ctx> CodeGen<'ctx> { fn jitcompilesum(&mut self) -> Result { let i64 = Type::i64(&self.context)?; let sumt = FuncType::new(i64, [i64, i64, i64])?; self.engine .module() .declarefunction(&self.build, "sum", sum_t, |f| { let params = f.params(); let x = params[0]; let y = params[1]; let z = params[2];

            let sum = self.build.add(x, y, "sum")?;
            let sum = self.build.add(sum, z, "sum")?;
            self.build.ret(sum)
        })?;

    unsafe { self.engine.function("sum") }
}

}

fn main() -> Result<(), Error> { let context = Context::new()?; let module = Module::new(&context, "sum")?; let build = Builder::new(&context)?; let engine = ExecutionEngine::new_jit(module, 0)?; let mut codegen = CodeGen { context: context, build, engine, };

let sum = codegen.jit_compile_sum()?;

let x = 1u64;
let y = 2u64;
let z = 3u64;

unsafe {
    println!("{} + {} + {} = {}", x, y, z, sum(x, y, z));
    assert_eq!(sum(x, y, z), x + y + z);
}

Ok(())

} ```