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fix set_n pass

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This commit is contained in:
nora 2022-04-15 23:44:09 +02:00
parent 7973d9f77b
commit d9f163ef3a
4 changed files with 11 additions and 11 deletions
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14
rust2/src/opts.rs
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@ -154,8 +154,16 @@ fn pass_find_set_null(ir: &mut Ir<'_>) {
/// pass that replaces `SetNull Add(5)` with `SetN(5)`
fn pass_set_n(ir: &mut Ir<'_>) {
let stmts = &mut ir.stmts;
let mut i = 0;
while i < stmts.len() - 1 {
for i in 0..stmts.len() {
let a = &mut stmts[i];
if let StmtKind::Loop(body) = &mut a.kind {
pass_set_n(body);
}
if i >= stmts.len() - 1 {
break; // we are the last element
}
let a = &stmts[i];
if let StmtKind::SetNull = a.kind() {
let b = &stmts[i + 1];
@ -163,7 +171,6 @@ fn pass_set_n(ir: &mut Ir<'_>) {
StmtKind::Add(n) => StmtKind::SetN(*n),
StmtKind::Sub(n) => StmtKind::SetN(0u8.wrapping_sub(*n)),
_ => {
i += 1;
continue;
}
};
@ -171,6 +178,5 @@ fn pass_set_n(ir: &mut Ir<'_>) {
stmts.remove(i + 1);
stmts[i] = Stmt::new(new, span);
}
i += 1;
}
}