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allow collapse_vars across conditional branches (#2867)

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This commit is contained in:
Alex Lam S.L
2018-02-03 02:44:40 +08:00
committed by GitHub
parent e773f03927
commit e6a2e9e4d0
2 changed files with 213 additions and 38 deletions
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134
test/compress/collapse_vars.js
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@@ -4249,3 +4249,137 @@ issue_2858: {
}
expect_stdout: "undefined"
}
cond_branch_1: {
options = {
collapse_vars: true,
sequences: true,
unused: true,
}
input: {
function f1(b, c) {
var log = console.log;
var a = ++c;
if (b) b++;
log(a, b);
}
function f2(b, c) {
var log = console.log;
var a = ++c;
b && b++;
log(a, b);
}
function f3(b, c) {
var log = console.log;
var a = ++c;
b ? b++ : b--;
log(a, b);
}
f1(1, 2);
f2(3, 4);
f3(5, 6);
}
expect: {
function f1(b, c) {
var log = console.log;
if (b) b++;
log(++c, b);
}
function f2(b, c) {
var log = console.log;
b && b++,
log(++c, b);
}
function f3(b, c) {
var log = console.log;
b ? b++ : b--,
log(++c, b);
}
f1(1, 2),
f2(3, 4),
f3(5, 6);
}
expect_stdout: [
"3 2",
"5 4",
"7 6",
]
}
cond_branch_2: {
options = {
collapse_vars: true,
sequences: true,
unused: true,
}
input: {
function f1(b, c) {
var log = console.log;
var a = ++c;
if (b) b += a;
log(a, b);
}
function f2(b, c) {
var log = console.log;
var a = ++c;
b && (b += a);
log(a, b);
}
function f3(b, c) {
var log = console.log;
var a = ++c;
b ? b += a : b--;
log(a, b);
}
f1(1, 2);
f2(3, 4);
f3(5, 6);
}
expect: {
function f1(b, c) {
var log = console.log;
var a = ++c;
if (b) b += a;
log(a, b);
}
function f2(b, c) {
var log = console.log;
var a = ++c;
b && (b += a),
log(a, b);
}
function f3(b, c) {
var log = console.log;
var a = ++c;
b ? b += a : b--,
log(a, b);
}
f1(1, 2),
f2(3, 4),
f3(5, 6);
}
expect_stdout: [
"3 4",
"5 8",
"7 12",
]
}
cond_branch_switch: {
options = {
collapse_vars: true,
}
input: {
var c = 0;
if (c = 1 + c, 0) switch (c = 1 + c) {
}
console.log(c);
}
expect: {
var c = 0;
if (c = 1 + c, 0) switch (c = 1 + c) {
}
console.log(c);
}
expect_stdout: "1"
}