perf(semantic): make CFG construction a compile-time feature

crates/oxc/Cargo.toml

@@ -54,7 +54,6 @@ full = [
   "transformer",
   "isolated_declarations",
   "ast_visit",
-  "cfg",
   "regular_expression",
 ]
 
@@ -63,7 +62,7 @@ transformer = ["oxc_transformer", "oxc_transformer_plugins"]
 minifier = ["oxc_mangler", "oxc_minifier"]
 codegen = ["oxc_codegen"]
 mangler = ["oxc_mangler"]
-cfg = ["oxc_cfg"]
+cfg = ["oxc_cfg", "oxc_semantic/cfg"]
 isolated_declarations = ["oxc_isolated_declarations"]
 ast_visit = ["oxc_ast_visit"]
 regular_expression = ["oxc_regular_expression", "oxc_parser/regular_expression"]

crates/oxc_linter/Cargo.toml

@@ -40,7 +40,7 @@ oxc_macros = { workspace = true, features = ["ruledocs"] }
 oxc_parser = { workspace = true }
 oxc_regular_expression = { workspace = true }
 oxc_resolver = { workspace = true }
-oxc_semantic = { workspace = true }
+oxc_semantic = { workspace = true, features = ["cfg"] }
 oxc_span = { workspace = true, features = ["schemars", "serialize"] }
 oxc_syntax = { workspace = true, features = ["serialize"] }
 

crates/oxc_semantic/Cargo.toml

@@ -22,7 +22,7 @@ doctest = true
 oxc_allocator = { workspace = true }
 oxc_ast = { workspace = true }
 oxc_ast_visit = { workspace = true }
-oxc_cfg = { workspace = true }
+oxc_cfg = { workspace = true, optional = true }
 oxc_data_structures = { workspace = true, features = ["assert_unchecked"] }
 oxc_diagnostics = { workspace = true }
 oxc_ecmascript = { workspace = true }
@@ -44,4 +44,5 @@ serde_json = { workspace = true }
 
 [features]
 default = []
+cfg = ["dep:oxc_cfg"]
 serialize = ["oxc_span/serialize", "oxc_syntax/serialize"]

crates/oxc_semantic/examples/cfg.rs

@@ -1,3 +1,4 @@
+#![cfg(feature = "cfg")]
 #![expect(clippy::print_stdout)]
 //! # Control Flow Graph (CFG) Example
 //!