fix(es/minifier): Avoid decl name when mangle with eval (#9546)

**Related issue:**

 - Closes #9542

Author: Austaras

.changeset/warm-lies-work.md

@@ -0,0 +1,6 @@
+---
+swc_core: patch
+swc_ecma_minifier: patch
+---
+
+fix(es/minifier): Avoid decl name when mangle with eval

crates/swc/tests/fixture/issues-5xxx/5068/1/output/index.js

@@ -3,7 +3,7 @@ function _templateObject() {
     var data = _tagged_template_literal([
         "\n  position: absolute;\n"
     ]);
-    _templateObject = function _templateObject() {
+    _templateObject = function _templateObject1() {
         return data;
     };
     return data;
@@ -12,7 +12,7 @@ function _templateObject1() {
     var data = _tagged_template_literal([
         "\n  position: absolute;\n"
     ]);
-    _templateObject1 = function _templateObject() {
+    _templateObject1 = function _templateObject1() {
         return data;
     };
     return data;

crates/swc_ecma_minifier/tests/mangle/issue-9542/input.js

@@ -0,0 +1,16 @@
+function test() {
+    (function (module) {
+        function FormatSendData(data) {}
+        eval();
+    })();
+
+    function n(i) {
+        var r1 = t[i];
+        if (void 0 !== r1) return r1.exports;
+        var o1 = (t[i] = {
+            exports: {},
+        });
+        return e[i](o1, o1.exports, n), o1.exports;
+    }
+}
+test();

crates/swc_ecma_minifier/tests/mangle/issue-9542/output.js

@@ -0,0 +1,15 @@
+function test() {
+    (function(module) {
+        function FormatSendData(n) {}
+        eval();
+    })();
+    function n(r) {
+        var o = t[r];
+        if (void 0 !== o) return o.exports;
+        var i = (t[r] = {
+            exports: {}
+        });
+        return e[r](i, i.exports, n), i.exports;
+    }
+}
+test();

crates/swc_ecma_transforms_base/src/rename/mod.rs

@@ -282,9 +282,41 @@ where
 
     unit!(visit_mut_private_method, PrivateMethod);
 
-    unit!(visit_mut_fn_decl, FnDecl, true);
+    fn visit_mut_fn_decl(&mut self, n: &mut FnDecl) {
+        if !self.config.ignore_eval && contains_eval(n, true) {
+            n.visit_mut_children_with(self);
+        } else {
+            let id = n.ident.to_id();
+            let inserted = self.preserved.insert(id.clone());
+            let map = self.get_map(n, true, false, false);
+
+            if inserted {
+                self.preserved.remove(&id);
+            }
+
+            if !map.is_empty() {
+                n.visit_mut_with(&mut rename_with_config(&map, self.config.clone()));
+            }
+        }
+    }
 
-    unit!(visit_mut_class_decl, ClassDecl, true);
+    fn visit_mut_class_decl(&mut self, n: &mut ClassDecl) {
+        if !self.config.ignore_eval && contains_eval(n, true) {
+            n.visit_mut_children_with(self);
+        } else {
+            let id = n.ident.to_id();
+            let inserted = self.preserved.insert(id.clone());
+            let map = self.get_map(n, true, false, false);
+
+            if inserted {
+                self.preserved.remove(&id);
+            }
+
+            if !map.is_empty() {
+                n.visit_mut_with(&mut rename_with_config(&map, self.config.clone()));
+            }
+        }
+    }
 
     fn visit_mut_default_decl(&mut self, n: &mut DefaultDecl) {
         match n {