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remove unused variables from let/letrec

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Folkert 2022-05-08 20:06:00 +02:00
parent e82c670747
commit 7be41d8c09
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9 changed files with 74 additions and 130 deletions
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22
compiler/can/src/expr.rs
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@ -106,8 +106,8 @@ pub enum Expr {
},
// Let
LetRec(Vec<Def>, Box<Loc<Expr>>, Variable),
LetNonRec(Box<Def>, Box<Loc<Expr>>, Variable),
LetRec(Vec<Def>, Box<Loc<Expr>>),
LetNonRec(Box<Def>, Box<Loc<Expr>>),
/// This is *only* for calling functions, not for tag application.
/// The Tag variant contains any applied values inside it.
@ -214,8 +214,8 @@ impl Expr {
&Self::Var(sym) => Category::Lookup(sym),
Self::When { .. } => Category::When,
Self::If { .. } => Category::If,
Self::LetRec(_, expr, _) => expr.value.category(),
Self::LetNonRec(_, expr, _) => expr.value.category(),
Self::LetRec(_, expr) => expr.value.category(),
Self::LetNonRec(_, expr) => expr.value.category(),
&Self::Call(_, _, called_via) => Category::CallResult(None, called_via),
&Self::RunLowLevel { op, .. } => Category::LowLevelOpResult(op),
Self::ForeignCall { .. } => Category::ForeignCall,
@ -1477,7 +1477,7 @@ pub fn inline_calls(var_store: &mut VarStore, scope: &mut Scope, expr: Expr) ->
Expect(Box::new(loc_condition), Box::new(loc_expr))
}
LetRec(defs, loc_expr, var) => {
LetRec(defs, loc_expr) => {
let mut new_defs = Vec::with_capacity(defs.len());
for def in defs {
@ -1498,10 +1498,10 @@ pub fn inline_calls(var_store: &mut VarStore, scope: &mut Scope, expr: Expr) ->
value: inline_calls(var_store, scope, loc_expr.value),
};
LetRec(new_defs, Box::new(loc_expr), var)
LetRec(new_defs, Box::new(loc_expr))
}
LetNonRec(def, loc_expr, var) => {
LetNonRec(def, loc_expr) => {
let def = Def {
loc_pattern: def.loc_pattern,
loc_expr: Loc {
@ -1518,7 +1518,7 @@ pub fn inline_calls(var_store: &mut VarStore, scope: &mut Scope, expr: Expr) ->
value: inline_calls(var_store, scope, loc_expr.value),
};
LetNonRec(Box::new(def), Box::new(loc_expr), var)
LetNonRec(Box::new(def), Box::new(loc_expr))
}
Closure(ClosureData {
@ -1672,11 +1672,7 @@ pub fn inline_calls(var_store: &mut VarStore, scope: &mut Scope, expr: Expr) ->
loc_answer = Loc {
region: Region::zero(),
value: LetNonRec(
Box::new(def),
Box::new(loc_answer),
var_store.fresh(),
),
value: LetNonRec(Box::new(def), Box::new(loc_answer)),
};
}