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optimizations for && and || where left side is constant expression

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kzc
2015-06-11 23:22:38 -04:00
parent 5bf617ebde
commit fedb6191a1
2 changed files with 189 additions and 0 deletions
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161
test/compress/conditionals.js
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@@ -384,3 +384,164 @@ cond_8: {
a = condition ? 1 : 0;
}
}
conditional_and: {
options = {
conditionals: true,
evaluate : true
};
input: {
var a;
// compress these
a = true && condition;
a = 1 && console.log("a");
a = 2 * 3 && 2 * condition;
a = 5 == 5 && condition + 3;
a = "string" && 4 - condition;
a = 5 + "" && condition / 5;
a = -4.5 && 6 << condition;
a = 6 && 7;
a = false && condition;
a = NaN && console.log("b");
a = 0 && console.log("c");
a = undefined && 2 * condition;
a = null && condition + 3;
a = 2 * 3 - 6 && 4 - condition;
a = 10 == 7 && condition / 5;
a = !"string" && 6 % condition;
a = 0 && 7;
// don't compress these
a = condition && true;
a = console.log("a") && 2;
a = 4 - condition && "string";
a = 6 << condition && -4.5;
a = condition && false;
a = console.log("b") && NaN;
a = console.log("c") && 0;
a = 2 * condition && undefined;
a = condition + 3 && null;
}
expect: {
var a;
a = condition;
a = console.log("a");
a = 2 * condition;
a = condition + 3;
a = 4 - condition;
a = condition / 5;
a = 6 << condition;
a = 7;
a = false;
a = NaN;
a = 0;
a = void 0;
a = null;
a = 0;
a = false;
a = false;
a = 0;
a = condition && true;
a = console.log("a") && 2;
a = 4 - condition && "string";
a = 6 << condition && -4.5;
a = condition && false;
a = console.log("b") && NaN;
a = console.log("c") && 0;
a = 2 * condition && void 0;
a = condition + 3 && null;
}
}
conditional_or: {
options = {
conditionals: true,
evaluate : true
};
input: {
var a;
// compress these
a = true || condition;
a = 1 || console.log("a");
a = 2 * 3 || 2 * condition;
a = 5 == 5 || condition + 3;
a = "string" || 4 - condition;
a = 5 + "" || condition / 5;
a = -4.5 || 6 << condition;
a = 6 || 7;
a = false || condition;
a = 0 || console.log("b");
a = NaN || console.log("c");
a = undefined || 2 * condition;
a = null || condition + 3;
a = 2 * 3 - 6 || 4 - condition;
a = 10 == 7 || condition / 5;
a = !"string" || 6 % condition;
a = null || 7;
a = console.log(undefined && condition || null);
a = console.log(undefined || condition && null);
// don't compress these
a = condition || true;
a = console.log("a") || 2;
a = 4 - condition || "string";
a = 6 << condition || -4.5;
a = condition || false;
a = console.log("b") || NaN;
a = console.log("c") || 0;
a = 2 * condition || undefined;
a = condition + 3 || null;
}
expect: {
var a;
a = true;
a = 1;
a = 6;
a = true;
a = "string";
a = "5";
a = -4.5;
a = 6;
a = condition;
a = console.log("b");
a = console.log("c");
a = 2 * condition;
a = condition + 3;
a = 4 - condition;
a = condition / 5;
a = 6 % condition;
a = 7;
a = console.log(null);
a = console.log(condition && null);
a = condition || true;
a = console.log("a") || 2;
a = 4 - condition || "string";
a = 6 << condition || -4.5;
a = condition || false;
a = console.log("b") || NaN;
a = console.log("c") || 0;
a = 2 * condition || void 0;
a = condition + 3 || null;
}
}