refactor(minifier): clean up (#8346)

crates/oxc_ecmascript/src/constant_evaluation/mod.rs

@@ -298,9 +298,8 @@ pub trait ConstantEvaluation<'a> {
             }
             BinaryOperator::BitwiseAnd | BinaryOperator::BitwiseOR | BinaryOperator::BitwiseXOR => {
                 if left.is_big_int_literal() && right.is_big_int_literal() {
-                    let left_bigint = self.get_side_free_bigint_value(left);
+                    let left_val = self.get_side_free_bigint_value(left)?;
-                    let right_bigint = self.get_side_free_bigint_value(right);
+                    let right_val = self.get_side_free_bigint_value(right)?;
-                    if let (Some(left_val), Some(right_val)) = (left_bigint, right_bigint) {
                     let result_val: BigInt = match operator {
                         BinaryOperator::BitwiseAnd => left_val & right_val,
                         BinaryOperator::BitwiseOR => left_val | right_val,
@@ -309,7 +308,6 @@ pub trait ConstantEvaluation<'a> {
                     };
                     return Some(ConstantValue::BigInt(result_val));
                 }
-                }
                 let left_num = self.get_side_free_number_value(left);
                 let right_num = self.get_side_free_number_value(right);
                 if let (Some(left_val), Some(right_val)) = (left_num, right_num) {
@@ -330,7 +328,7 @@ pub trait ConstantEvaluation<'a> {
                 if left.may_have_side_effects() {
                     return None;
                 }
-                if let Some(right_ident) = right.get_identifier_reference() {
+                if let Expression::Identifier(right_ident) = right {
                     let name = right_ident.name.as_str();
                     if matches!(name, "Object" | "Number" | "Boolean" | "String")
                         && self.is_global_reference(right_ident)

crates/oxc_minifier/src/ast_passes/convert_to_dotted_properties.rs

@@ -2,7 +2,7 @@ use oxc_ast::ast::*;
 use oxc_syntax::identifier::is_identifier_name;
 use oxc_traverse::{traverse_mut_with_ctx, ReusableTraverseCtx, Traverse, TraverseCtx};
 
-use crate::{node_util::Ctx, CompressorPass};
+use crate::{ctx::Ctx, CompressorPass};
 
 /// Converts property accesses from quoted string or bracket access syntax to dot or unquoted string
 /// syntax, where possible. Dot syntax is more compact.

crates/oxc_minifier/src/ast_passes/mod.rs

@@ -51,6 +51,8 @@ pub struct PeepholeOptimizations {
 }
 
 impl PeepholeOptimizations {
+    /// `in_fixed_loop`: Do not compress syntaxes that are hard to analyze inside the fixed loop.
+    /// Opposite of `late` in Closure Compiler.
     pub fn new(in_fixed_loop: bool, options: CompressOptions) -> Self {
         Self {
             x0_statement_fusion: StatementFusion::new(),
@@ -58,7 +60,7 @@ impl PeepholeOptimizations {
             x2_exploit_assigns: ExploitAssigns::new(),
             x3_collapse_variable_declarations: CollapseVariableDeclarations::new(),
             x4_peephole_remove_dead_code: PeepholeRemoveDeadCode::new(),
-            x5_peephole_minimize_conditions: PeepholeMinimizeConditions::new(in_fixed_loop),
+            x5_peephole_minimize_conditions: PeepholeMinimizeConditions::new(),
             x6_peephole_substitute_alternate_syntax: PeepholeSubstituteAlternateSyntax::new(
                 options.target,
                 in_fixed_loop,

crates/oxc_minifier/src/ast_passes/normalize.rs

@@ -2,7 +2,7 @@ use oxc_ast::ast::*;
 use oxc_syntax::scope::ScopeFlags;
 use oxc_traverse::{traverse_mut_with_ctx, ReusableTraverseCtx, Traverse, TraverseCtx};
 
-use crate::{node_util::Ctx, CompressorPass};
+use crate::{ctx::Ctx, CompressorPass};
 
 /// Normalize AST
 ///

crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs

@@ -10,7 +10,7 @@ use oxc_syntax::{
 };
 use oxc_traverse::{traverse_mut_with_ctx, Ancestor, ReusableTraverseCtx, Traverse, TraverseCtx};
 
-use crate::{node_util::Ctx, CompressorPass};
+use crate::{ctx::Ctx, CompressorPass};
 
 /// Constant Folding
 ///

crates/oxc_minifier/src/ast_passes/peephole_minimize_conditions.rs

@@ -14,10 +14,6 @@ use crate::CompressorPass;
 ///
 /// <https://github.com/google/closure-compiler/blob/v20240609/src/com/google/javascript/jscomp/PeepholeMinimizeConditions.java>
 pub struct PeepholeMinimizeConditions {
-    /// Do not compress syntaxes that are hard to analyze inside the fixed loop.
-    #[allow(unused)]
-    in_fixed_loop: bool,
-
     pub(crate) changed: bool,
 }
 
@@ -70,8 +66,8 @@ impl<'a> Traverse<'a> for PeepholeMinimizeConditions {
 }
 
 impl<'a> PeepholeMinimizeConditions {
-    pub fn new(in_fixed_loop: bool) -> Self {
+    pub fn new() -> Self {
-        Self { in_fixed_loop, changed: false }
+        Self { changed: false }
     }
 
     /// Try to minimize NOT nodes such as `!(x==y)`.
@@ -613,7 +609,7 @@ mod test {
 
     fn test(source_text: &str, positive: &str) {
         let allocator = Allocator::default();
-        let mut pass = super::PeepholeMinimizeConditions::new(true);
+        let mut pass = super::PeepholeMinimizeConditions::new();
         tester::test(&allocator, source_text, positive, &mut pass);
     }
 

crates/oxc_minifier/src/ast_passes/peephole_remove_dead_code.rs

@@ -7,7 +7,7 @@ use oxc_ecmascript::{
 use oxc_span::SPAN;
 use oxc_traverse::{traverse_mut_with_ctx, Ancestor, ReusableTraverseCtx, Traverse, TraverseCtx};
 
-use crate::{keep_var::KeepVar, node_util::Ctx, CompressorPass};
+use crate::{ctx::Ctx, keep_var::KeepVar, CompressorPass};
 
 /// Remove Dead Code from the AST.
 ///

crates/oxc_minifier/src/ast_passes/peephole_replace_known_methods.rs

@@ -9,7 +9,7 @@ use oxc_ecmascript::{
 };
 use oxc_traverse::{traverse_mut_with_ctx, ReusableTraverseCtx, Traverse, TraverseCtx};
 
-use crate::{node_util::Ctx, CompressorPass};
+use crate::{ctx::Ctx, CompressorPass};
 
 /// Minimize With Known Methods
 /// <https://github.com/google/closure-compiler/blob/v20240609/src/com/google/javascript/jscomp/PeepholeReplaceKnownMethods.java>

crates/oxc_minifier/src/ast_passes/peephole_substitute_alternate_syntax.rs

@@ -13,7 +13,7 @@ use oxc_syntax::{
 };
 use oxc_traverse::{traverse_mut_with_ctx, Ancestor, ReusableTraverseCtx, Traverse, TraverseCtx};
 
-use crate::{node_util::Ctx, CompressorPass};
+use crate::{ctx::Ctx, CompressorPass};
 
 /// A peephole optimization that minimizes code by simplifying conditional
 /// expressions, replacing IFs with HOOKs, replacing object constructors
@@ -21,12 +21,9 @@ use crate::{node_util::Ctx, CompressorPass};
 /// <https://github.com/google/closure-compiler/blob/v20240609/src/com/google/javascript/jscomp/PeepholeSubstituteAlternateSyntax.java>
 pub struct PeepholeSubstituteAlternateSyntax {
     target: ESTarget,
-    /// Do not compress syntaxes that are hard to analyze inside the fixed loop.
+
-    /// e.g. Do not compress `undefined -> void 0`, `true` -> `!0`.
-    /// Opposite of `late` in Closure Compiler.
     in_fixed_loop: bool,
 
-    // states
     in_define_export: bool,
 
     pub(crate) changed: bool,

crates/oxc_minifier/src/lib.rs

@@ -2,8 +2,8 @@
 
 mod ast_passes;
 mod compressor;
+mod ctx;
 mod keep_var;
-mod node_util;
 mod options;
 
 #[cfg(test)]