enhance `side_effects` (#3410)

2 files changed, 42 insertions, 0 deletions

diff --git a/test/compress/loops.js b/test/compress/loops.js
index 137fd9da..d835080d 100644
--- a/test/compress/loops.js
+++ b/test/compress/loops.js
@@ -673,3 +673,19 @@ issue_3371: {
     }
     expect_stdout: "PASS"
 }
+
+step: {
+    options = {
+        loops: true,
+        side_effects: true,
+    }
+    input: {
+        for (var i = 0; i < 42; "foo", i++, "bar");
+        console.log(i);
+    }
+    expect: {
+        for (var i = 0; i < 42; i++);
+        console.log(i);
+    }
+    expect_stdout: "42"
+}
diff --git a/test/compress/pure_getters.js b/test/compress/pure_getters.js
index 61ce8a92..b6e42f9d 100644
--- a/test/compress/pure_getters.js
+++ b/test/compress/pure_getters.js
@@ -1161,3 +1161,29 @@ collapse_rhs_lhs: {
     }
     expect_stdout: "1 3"
 }
+
+drop_arguments: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        (function() {
+            arguments.slice = function() {
+                console.log("PASS");
+            };
+            arguments[42];
+            arguments.length;
+            arguments.slice();
+        })();
+    }
+    expect: {
+        (function() {
+            arguments.slice = function() {
+                console.log("PASS");
+            };
+            arguments.slice();
+        })();
+    }
+    expect_stdout: "PASS"
+}