reduce hoisting declarations (#2687)

2017-12-31 16:15:00 +08:00
parent e2ec270b04
commit 333792352e
2 changed files with 68 additions and 16 deletions
--- a/test/compress/reduce_vars.js
+++ b/test/compress/reduce_vars.js
@@ -2312,8 +2312,7 @@ delay_def: {
    }
    expect: {
        function f() {
-            return a;
-            var a;
+            return;
        }
        function g() {
            return a;
@@ -2324,6 +2323,28 @@ delay_def: {
    expect_stdout: true
 }

+delay_def_lhs: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function() {
+            long_name++;
+            return long_name;
+            var long_name;
+        }());
+    }
+    expect: {
+        console.log(function() {
+            long_name++;
+            return long_name;
+            var long_name;
+        }());
+    }
+    expect_stdout: "NaN"
+}
+
 booleans: {
    options = {
        booleans: true,
@@ -4952,3 +4973,29 @@ issue_2598: {
    }
    expect_stdout: "true"
 }
+
+var_if: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        function f() {
+            if (x()) {
+                var a;
+                if (!g) a = true;
+                if (a) g();
+            }
+        }
+    }
+    expect: {
+        function f() {
+            if (x()) {
+                var a;
+                if (!g) a = true;
+                if (a) g();
+            }
+        }
+    }
+}