JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

enhance loops & unused (#4074)

Browse Source 
- extend `ufuzz` generation of for-in loops
This commit is contained in:
Alex Lam S.L
2020-08-26 02:32:55 +01:00
committed by GitHub
parent 09525c7530
commit c7a3e09407
3 changed files with 67 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
test/compress/loops.js
View File

@@ -756,7 +756,37 @@ empty_for_in_side_effects: {
expect_warnings: [
"WARN: Dropping unused variable b [test/compress/loops.js:4,16]",
"INFO: Dropping unused loop variable a [test/compress/loops.js:1,17]",
"WARN: Side effects in object of for-in loop [test/compress/loops.js:1,17]",
"WARN: Side effects in object of for-in loop [test/compress/loops.js:2,17]",
]
}
empty_for_in_prop_init: {
options = {
loops: true,
pure_getters: "strict",
unused: true,
}
input: {
console.log(function f() {
var a = "bar";
for ((a, f)[a] in console.log("foo"));
return a;
}());
}
expect: {
console.log(function() {
var a = "bar";
console.log("foo");
return a;
}());
}
expect_stdout: [
"foo",
"bar",
]
expect_warnings: [
"INFO: Dropping unused loop variable f [test/compress/loops.js:3,21]",
"WARN: Side effects in object of for-in loop [test/compress/loops.js:3,30]",
]
}

15
test/ufuzz/index.js
View File

@@ -496,11 +496,16 @@ function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn
var label = createLabel(canBreak, canContinue);
canBreak = label.break || enableLoopControl(canBreak, CAN_BREAK);
canContinue = label.continue || enableLoopControl(canContinue, CAN_CONTINUE);
var optElementVar = "";
if (rng(5) > 1) {
optElementVar = "c = 1 + c; var " + createVarName(MANDATORY) + " = expr" + loop + "[key" + loop + "]; ";
}
return "{var expr" + loop + " = " + createExpression(recurmax, COMMA_OK, stmtDepth, canThrow) + "; " + label.target + " for (var key" + loop + " in expr" + loop + ") {" + optElementVar + createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth) + "}}";
var key = rng(10) ? "key" + loop : getVarName();
return [
"{var expr" + loop + " = " + createExpression(recurmax, COMMA_OK, stmtDepth, canThrow) + "; ",
label.target + " for (",
/^key/.test(key) ? "var " : "",
key + " in expr" + loop + ") {",
rng(5) > 1 ? "c = 1 + c; var " + createVarName(MANDATORY) + " = expr" + loop + "[" + key + "]; " : "",
createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth),
"}}",
].join("");
case STMT_SEMI:
return use_strict && rng(20) === 0 ? '"use strict";' : ";";
case STMT_EXPR: