optimize try-catch-finally (#1731)

- eliminate empty blocks - flatten out if try-block does not throw
2017-03-30 12:16:58 +08:00
parent 0f910ee25c
commit 7bea38a05d
5 changed files with 81 additions and 12 deletions
--- a/test/compress/screw-ie8.js
+++ b/test/compress/screw-ie8.js
@@ -204,13 +204,13 @@ issue_1586_1: {
    input: {
        function f() {
            try {
+                x();
            } catch (err) {
                console.log(err.message);
            }
        }
    }
-    expect_exact: "function f(){try{}catch(c){console.log(c.message)}}"
-    expect_stdout: true
+    expect_exact: "function f(){try{x()}catch(c){console.log(c.message)}}"
 }

 issue_1586_2: {
@@ -223,11 +223,11 @@ issue_1586_2: {
    input: {
        function f() {
            try {
+                x();
            } catch (err) {
                console.log(err.message);
            }
        }
    }
-    expect_exact: "function f(){try{}catch(c){console.log(c.message)}}"
-    expect_stdout: true
+    expect_exact: "function f(){try{x()}catch(c){console.log(c.message)}}"
 }