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Optimize if_return for single if/return cases.

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Fixes #1089
This commit is contained in:
kzc
2016-05-22 11:35:41 -04:00
committed by Richard van Velzen
parent bc49dfd27a
commit 1e390269d4
2 changed files with 221 additions and 1 deletions
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207
test/compress/if_return.js Normal file
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@@ -0,0 +1,207 @@
if_return_1: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f(x) {
if (x) {
return true;
}
}
}
expect: {
function f(x){if(x)return!0}
}
}
if_return_2: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f(x, y) {
if (x)
return 3;
if (y)
return c();
}
}
expect: {
function f(x,y){return x?3:y?c():void 0}
}
}
if_return_3: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f(x) {
a();
if (x) {
b();
return false;
}
}
}
expect: {
function f(x){if(a(),x)return b(),!1}
}
}
if_return_4: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f(x, y) {
a();
if (x) return 3;
b();
if (y) return c();
}
}
expect: {
function f(x,y){return a(),x?3:(b(),y?c():void 0)}
}
}
if_return_5: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f() {
if (x)
return;
return 7;
if (y)
return j;
}
}
expect: {
function f(){if(!x)return 7}
}
}
if_return_6: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f(x) {
return x ? true : void 0;
return y;
}
}
expect: {
// suboptimal
function f(x){return!!x||void 0}
}
}
if_return_7: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function f(x) {
if (x) {
return true;
}
foo();
bar();
}
}
expect: {
// suboptimal
function f(x){return!!x||(foo(),void bar())}
}
}
issue_1089: {
options = {
if_return : true,
sequences : true,
conditionals : true,
comparisons : true,
evaluate : true,
booleans : true,
unused : true,
side_effects : true,
dead_code : true,
}
input: {
function x() {
var f = document.getElementById("fname");
if (f.files[0].size > 12345) {
alert("alert");
f.focus();
return false;
}
}
}
expect: {
function x() {
var f = document.getElementById("fname");
if (f.files[0].size > 12345)
return alert("alert"), f.focus(), !1;
}
}
}