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Don't replace undefined, NaN and Infinity within with scope

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This commit is contained in:
kzc
2016-06-18 23:06:59 -04:00
committed by Richard van Velzen
parent 85fbf86d7b
commit 0c003c92a8
2 changed files with 133 additions and 31 deletions
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55
lib/compress.js
View File

@@ -1056,31 +1056,37 @@ merge(Compressor.prototype, {
throw def;
});
def(AST_Binary, function(c){
var left = this.left, right = this.right;
var left = this.left, right = this.right, result;
switch (this.operator) {
case "&&" : return ev(left, c) && ev(right, c);
case "||" : return ev(left, c) || ev(right, c);
case "|" : return ev(left, c) | ev(right, c);
case "&" : return ev(left, c) & ev(right, c);
case "^" : return ev(left, c) ^ ev(right, c);
case "+" : return ev(left, c) + ev(right, c);
case "*" : return ev(left, c) * ev(right, c);
case "/" : return ev(left, c) / ev(right, c);
case "%" : return ev(left, c) % ev(right, c);
case "-" : return ev(left, c) - ev(right, c);
case "<<" : return ev(left, c) << ev(right, c);
case ">>" : return ev(left, c) >> ev(right, c);
case ">>>" : return ev(left, c) >>> ev(right, c);
case "==" : return ev(left, c) == ev(right, c);
case "===" : return ev(left, c) === ev(right, c);
case "!=" : return ev(left, c) != ev(right, c);
case "!==" : return ev(left, c) !== ev(right, c);
case "<" : return ev(left, c) < ev(right, c);
case "<=" : return ev(left, c) <= ev(right, c);
case ">" : return ev(left, c) > ev(right, c);
case ">=" : return ev(left, c) >= ev(right, c);
}
case "&&" : result = ev(left, c) && ev(right, c); break;
case "||" : result = ev(left, c) || ev(right, c); break;
case "|" : result = ev(left, c) | ev(right, c); break;
case "&" : result = ev(left, c) & ev(right, c); break;
case "^" : result = ev(left, c) ^ ev(right, c); break;
case "+" : result = ev(left, c) + ev(right, c); break;
case "*" : result = ev(left, c) * ev(right, c); break;
case "/" : result = ev(left, c) / ev(right, c); break;
case "%" : result = ev(left, c) % ev(right, c); break;
case "-" : result = ev(left, c) - ev(right, c); break;
case "<<" : result = ev(left, c) << ev(right, c); break;
case ">>" : result = ev(left, c) >> ev(right, c); break;
case ">>>" : result = ev(left, c) >>> ev(right, c); break;
case "==" : result = ev(left, c) == ev(right, c); break;
case "===" : result = ev(left, c) === ev(right, c); break;
case "!=" : result = ev(left, c) != ev(right, c); break;
case "!==" : result = ev(left, c) !== ev(right, c); break;
case "<" : result = ev(left, c) < ev(right, c); break;
case "<=" : result = ev(left, c) <= ev(right, c); break;
case ">" : result = ev(left, c) > ev(right, c); break;
case ">=" : result = ev(left, c) >= ev(right, c); break;
default:
throw def;
}
if (isNaN(result) && c.find_parent(AST_With)) {
// leave original expression as is
throw def;
}
return result;
});
def(AST_Conditional, function(compressor){
return ev(this.condition, compressor)
@@ -2599,6 +2605,8 @@ merge(Compressor.prototype, {
if (defines && HOP(defines, self.name)) {
return make_node_from_constant(compressor, defines[self.name], self);
}
// testing against !self.scope.uses_with first is an optimization
if (!self.scope.uses_with || !compressor.find_parent(AST_With)) {
switch (self.name) {
case "undefined":
return make_node(AST_Undefined, self);
@@ -2608,6 +2616,7 @@ merge(Compressor.prototype, {
return make_node(AST_Infinity, self).transform(compressor);
}
}
}
return self;
});

93
test/compress/issue-1105.js
View File

@@ -145,3 +145,96 @@ check_drop_unused_in_peer_function: {
}
}
}
Infinity_not_in_with_scope: {
options = {
unused: true
}
input: {
var o = { Infinity: 'oInfinity' };
var vInfinity = "Infinity";
vInfinity = Infinity;
}
expect: {
var o = { Infinity: 'oInfinity' }
var vInfinity = "Infinity"
vInfinity = 1/0
}
}
Infinity_in_with_scope: {
options = {
unused: true
}
input: {
var o = { Infinity: 'oInfinity' };
var vInfinity = "Infinity";
with (o) { vInfinity = Infinity; }
}
expect: {
var o = { Infinity: 'oInfinity' }
var vInfinity = "Infinity"
with (o) vInfinity = Infinity
}
}
assorted_Infinity_NaN_undefined_in_with_scope: {
options = {
unused: true,
evaluate: true,
dead_code: true,
conditionals: true,
comparisons: true,
booleans: true,
hoist_funs: true,
keep_fargs: true,
if_return: true,
join_vars: true,
cascade: true,
side_effects: true,
sequences: false,
}
input: {
var o = {
undefined : 3,
NaN : 4,
Infinity : 5,
}
if (o) {
f(undefined, void 0);
f(NaN, 0/0);
f(Infinity, 1/0);
f(-Infinity, -(1/0));
f(2 + 7 + undefined, 2 + 7 + void 0);
}
with (o) {
f(undefined, void 0);
f(NaN, 0/0);
f(Infinity, 1/0);
f(-Infinity, -(1/0));
f(2 + 7 + undefined, 2 + 7 + void 0);
}
}
expect: {
var o = {
undefined : 3,
NaN : 4,
Infinity : 5
}
if (o) {
f(void 0, void 0);
f(NaN, NaN);
f(1/0, 1/0);
f(-(1/0), -(1/0));
f(NaN, NaN);
}
with (o) {
f(undefined, void 0);
f(NaN, 0/0);
f(Infinity, 1/0);
f(-Infinity, -(1/0));
f(9 + undefined, 9 + void 0);
}
}
}