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fix has_side_effects() (#1675)

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`AST_Try` is an `AST_Block`, so besides try block we also need to inspect catch and finally blocks for possible side effects.

Also extend this functionality to handle `AST_If` and `AST_LabeledStatement` while we are at it.

fixes #1673
This commit is contained in:
Alex Lam S.L
2017-03-25 23:03:26 +08:00
committed by GitHub
parent 0a65de89b9
commit b19aa58cff
2 changed files with 149 additions and 13 deletions
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127
test/compress/issue-1673.js Normal file
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@@ -0,0 +1,127 @@
side_effects_catch: {
options = {
reduce_vars: true,
side_effects: true,
unused: true,
}
input: {
function f() {
function g() {
try {
throw 0;
} catch (e) {
console.log("PASS");
}
}
g();
}
f();
}
expect: {
function f() {
(function() {
try {
throw 0;
} catch (e) {
console.log("PASS");
}
})();
}
f();
}
expect_stdout: "PASS"
}
side_effects_else: {
options = {
reduce_vars: true,
side_effects: true,
unused: true,
}
input: {
function f(x) {
function g() {
if (x);
else console.log("PASS");
}
g();
}
f(0);
}
expect: {
function f(x) {
(function() {
if (x);
else console.log("PASS");
})();
}
f(0);
}
expect_stdout: "PASS"
}
side_effects_finally: {
options = {
reduce_vars: true,
side_effects: true,
unused: true,
}
input: {
function f() {
function g() {
try {
} catch (e) {
} finally {
console.log("PASS");
}
}
g();
}
f();
}
expect: {
function f() {
(function() {
try {
} catch (e) {
} finally {
console.log("PASS");
}
})();
}
f();
}
expect_stdout: "PASS"
}
side_effects_label: {
options = {
reduce_vars: true,
side_effects: true,
unused: true,
}
input: {
function f(x) {
function g() {
L: {
console.log("PASS");
break L;
}
}
g();
}
f(0);
}
expect: {
function f(x) {
(function() {
L: {
console.log("PASS");
break L;
}
})();
}
f(0);
}
expect_stdout: "PASS"
}