improve inline efficiency (#2188)

... by teaching `collapse_vars` some new tricks. fixes #2187
2017-07-02 01:05:14 +08:00
parent 7659ea1d2e
commit d40950b741
6 changed files with 119 additions and 69 deletions
--- a/test/compress/collapse_vars.js
+++ b/test/compress/collapse_vars.js
@@ -1978,10 +1978,10 @@ chained_3: {
    }
    expect: {
        console.log(function(a, b) {
-            var c = a, c = b;
+            var c = 1, c = b;
            b++;
            return c;
-        }(1, 2));
+        }(0, 2));
    }
    expect_stdout: "2"
 }
@@ -2186,3 +2186,34 @@ compound_assignment: {
    }
    expect_stdout: "4"
 }
+
+issue_2187: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = 1;
+        !function(foo) {
+            foo();
+            var a = 2;
+            console.log(a);
+        }(function() {
+            console.log(a);
+        });
+    }
+    expect: {
+        var a = 1;
+        !function(foo) {
+            foo();
+            var a = 2;
+            console.log(a);
+        }(function() {
+            console.log(a);
+        });
+    }
+    expect_stdout: [
+        "1",
+        "2",
+    ]
+}