Method special_param

cranelift/codegen/src/ir/function.rs:283–288

Find a presumed unique special-purpose function parameter value. Returns the value of the last `purpose` parameter, or `None` if no such parameter exists.

(&self, purpose: ir::ArgumentPurpose)

    ///
    /// Returns the value of the last `purpose` parameter, or `None` if no such parameter exists.
    pub fn special_param(&self, purpose: ir::ArgumentPurpose) -> Option<ir::Value> {
        let entry = self.layout.entry_block().expect("Function is empty");
        self.signature
            .special_param_index(purpose)
            .map(|i| self.dfg.block_params(entry)[i])
    }

    /// Starts collection of debug information.
    pub fn collect_debug_info(&mut self) {