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basic global constants

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This commit is contained in:
Antoni Piasecki
2025-12-25 15:19:15 +01:00
parent c527aceecd
commit 781c35d484
5 changed files with 57 additions and 12 deletions
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38
src/codegen_x86_64.rs
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@@ -176,6 +176,9 @@ _builtin_environ:
let offset = env.define_var(name.lexeme.clone(), var_type);
emit!(&mut self.output, " mov QWORD [rbp-{}], rax", offset);
}
Stmt::Const { name: _, value: _ } => {
// handled in the analyzer
}
Stmt::Block(statements) => {
env.push_scope();
for stmt in statements {
@@ -445,18 +448,29 @@ _builtin_environ:
}
}
Expr::Variable(name) => {
// TODO: move to analyzer
let var = match env.get_var(&name.lexeme) {
Some(x) => x,
None => {
return error!(name.loc, format!("undefined variable: {}", &name.lexeme));
}
};
emit!(
&mut self.output,
" mov rax, QWORD [rbp-{}]",
var.stack_offset,
);
if self.analyzer.constants.contains_key(&name.lexeme) {
emit!(
&mut self.output,
" mov rax, {}",
self.analyzer.constants[&name.lexeme]
);
} else {
// TODO: move to analyzer
let var = match env.get_var(&name.lexeme) {
Some(x) => x,
None => {
return error!(
name.loc,
format!("undefined variable: {}", &name.lexeme)
);
}
};
emit!(
&mut self.output,
" mov rax, QWORD [rbp-{}]",
var.stack_offset,
);
}
}
Expr::Assign { name, value } => {
self.compile_expr(env, *value)?;