diff --git a/crates/swc_ecma_minifier/src/compress/optimize/iife.rs b/crates/swc_ecma_minifier/src/compress/optimize/iife.rs
index e9c4cc43e890..9a18835ccad1 100644
--- a/crates/swc_ecma_minifier/src/compress/optimize/iife.rs
+++ b/crates/swc_ecma_minifier/src/compress/optimize/iife.rs
@@ -470,6 +470,13 @@ impl Optimizer<'_> {
             return;
         }
 
+        trace_op!("iife: Checking pure");
+
+        if self.has_pure(call.span) {
+            log_abort!("iife: Has pure mark");
+            return;
+        }
+
         trace_op!("iife: Checking callee");
 
         match callee {
diff --git a/crates/swc_ecma_minifier/src/compress/optimize/mod.rs b/crates/swc_ecma_minifier/src/compress/optimize/mod.rs
index 93fa0200b3a5..81362f956131 100644
--- a/crates/swc_ecma_minifier/src/compress/optimize/mod.rs
+++ b/crates/swc_ecma_minifier/src/compress/optimize/mod.rs
@@ -833,7 +833,8 @@ impl Optimizer<'_> {
                     BlockStmtOrExpr::Expr(_) => false,
                 },
                 _ => false,
-            } && args.is_empty() =>
+            } && args.is_empty()
+                || e.span().has_mark(self.marks.pure) =>
             {
                 report_change!("ignore_return_value: Dropping a pure call");
                 self.changed = true;
diff --git a/crates/swc_ecma_minifier/src/compress/optimize/util.rs b/crates/swc_ecma_minifier/src/compress/optimize/util.rs
index 7ae6087aeae3..eaa051c5979b 100644
--- a/crates/swc_ecma_minifier/src/compress/optimize/util.rs
+++ b/crates/swc_ecma_minifier/src/compress/optimize/util.rs
@@ -77,6 +77,11 @@ impl<'b> Optimizer<'b> {
         span.has_mark(self.marks.noinline)
     }
 
+    /// Check for `/*#__PURE__*/`
+    pub(super) fn has_pure(&self, span: Span) -> bool {
+        span.has_mark(self.marks.pure)
+    }
+
     /// RAII guard to change context temporarically
     pub(super) fn with_ctx(&mut self, mut ctx: Ctx) -> WithCtx<'_, 'b> {
         let mut scope_ctxt = ctx.scope;
diff --git a/crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs b/crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs
index 76bfb7995209..61ceab5e3d9a 100644
--- a/crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs
+++ b/crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs
@@ -1,4 +1,4 @@
-use swc_common::{collections::AHashMap, SyntaxContext};
+use swc_common::{collections::AHashMap, Spanned, SyntaxContext};
 use swc_ecma_ast::*;
 use swc_ecma_utils::{find_pat_ids, ExprCtx, ExprExt, IsEmpty, StmtExt};
 use swc_ecma_visit::{noop_visit_type, Visit, VisitWith};
@@ -1294,7 +1294,7 @@ where
                 ..self.ctx
             };
 
-            if self.marks.is_some() {
+            if let Some(marks) = self.marks {
                 if let VarDeclarator {
                     name: Pat::Ident(id),
                     init: Some(init),
@@ -1306,7 +1306,8 @@ where
                     self.used_recursively.insert(
                         id.clone(),
                         RecursiveUsage::Var {
-                            can_ignore: !init.may_have_side_effects(&self.expr_ctx),
+                            can_ignore: !init.may_have_side_effects(&self.expr_ctx)
+                                || init.span().has_mark(marks.pure),
                         },
                     );
                     e.init.visit_with(&mut *self.with_ctx(ctx));