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parse variadic functions

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This commit is contained in:
Antoni Piasecki
2026-04-04 12:17:44 +02:00
parent 86de997be3
commit bb42e1fcf7
5 changed files with 110 additions and 54 deletions
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35
src/codegen_x86_64.rs
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@@ -1,7 +1,7 @@
use std::{collections::HashMap, fmt::Write};
use crate::{
parser::{Expr, Stmt},
parser::{Expr, Params, Stmt},
symbol_table::SymbolTable,
tokenizer::{Token, TokenType, ZernError, error},
};
@@ -317,20 +317,27 @@ _builtin_environ:
emit!(&mut self.output, " mov rbp, rsp");
emit!(&mut self.output, " sub rsp, 256"); // TODO: eww
for (i, param) in params.iter().enumerate() {
let offset = env
.define_var(param.var_name.lexeme.clone(), param.var_type.lexeme.clone());
if let Some(reg) = REGISTERS.get(i) {
emit!(&mut self.output, " mov QWORD [rbp-{}], {}", offset, reg);
} else {
let stack_offset = 16 + 8 * (i - REGISTERS.len());
emit!(
&mut self.output,
" mov rax, QWORD [rbp+{}]",
stack_offset
);
emit!(&mut self.output, " mov QWORD [rbp-{}], rax", offset);
match params {
Params::Normal(params) => {
for (i, param) in params.iter().enumerate() {
let offset = env.define_var(
param.var_name.lexeme.clone(),
param.var_type.lexeme.clone(),
);
if let Some(reg) = REGISTERS.get(i) {
emit!(&mut self.output, " mov QWORD [rbp-{}], {}", offset, reg);
} else {
let stack_offset = 16 + 8 * (i - REGISTERS.len());
emit!(
&mut self.output,
" mov rax, QWORD [rbp+{}]",
stack_offset
);
emit!(&mut self.output, " mov QWORD [rbp-{}], rax", offset);
}
}
}
Params::Variadic(_name) => todo!(),
}
self.compile_stmt(env, body)?;