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Fix off by one error in optimizer.

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This commit is contained in:
Stephen Chung 2021-04-24 13:42:45 +08:00
parent b5a2937336
commit ce35f7fa72
1 changed files with 6 additions and 17 deletions
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23
src/optimize.rs
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@ -239,29 +239,18 @@ fn optimize_stmt_block(
.find_map(|(i, stmt)| match stmt {
stmt if !is_pure(stmt) => Some(i),
Stmt::Noop(_) | Stmt::Return(_, None, _) => None,
Stmt::Let(e, _, _, _)
| Stmt::Const(e, _, _, _)
| Stmt::Expr(e)
| Stmt::Return(_, Some(e), _)
if e.is_constant() =>
Stmt::Let(e, _, _, _) | Stmt::Const(e, _, _, _) | Stmt::Expr(e)
if !e.is_constant() =>
{
None
Some(i)
}
#[cfg(not(feature = "no_module"))]
Stmt::Import(e, _, _) if e.is_constant() => None,
Stmt::Import(e, _, _) if !e.is_constant() => Some(i),
#[cfg(not(feature = "no_module"))]
Stmt::Export(_, _) => None,
#[cfg(not(feature = "no_closure"))]
Stmt::Share(_) => None,
_ => Some(i),
_ => None,
})
.map_or(0, |n| statements.len() - n);
.map_or(0, |n| statements.len() - n - 1);
while index < statements.len() {
if preserve_result && index >= statements.len() - 1 {