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inline property access of object literal (#2209)

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- only if property value is side-effect-free
- guard by `unsafe`

fixes #2208
This commit is contained in:
Alex Lam S.L
2017-07-06 21:51:58 +08:00
committed by GitHub
parent 9306da3c58
commit 4b6ca5e742
4 changed files with 195 additions and 40 deletions
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92
test/compress/evaluate.js
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@@ -250,22 +250,26 @@ unsafe_constant: {
unsafe_object: {
options = {
evaluate : true,
unsafe : true
evaluate: true,
reduce_vars: true,
toplevel: true,
unsafe: true,
}
input: {
var o = { a: 1 };
console.log(
({a:1}) + 1,
({a:1}).a + 1,
({a:1}).b + 1,
({a:1}).a.b + 1
o + 1,
o.a + 1,
o.b + 1,
o.a.b + 1
);
}
expect: {
var o = { a: 1 };
console.log(
({a:1}) + 1,
o + 1,
2,
({a:1}).b + 1,
o.b + 1,
1..b + 1
);
}
@@ -274,22 +278,26 @@ unsafe_object: {
unsafe_object_nested: {
options = {
evaluate : true,
unsafe : true
evaluate: true,
reduce_vars: true,
toplevel: true,
unsafe: true,
}
input: {
var o = { a: { b: 1 } };
console.log(
({a:{b:1}}) + 1,
({a:{b:1}}).a + 1,
({a:{b:1}}).b + 1,
({a:{b:1}}).a.b + 1
o + 1,
o.a + 1,
o.b + 1,
o.a.b + 1
);
}
expect: {
var o = { a: { b: 1 } };
console.log(
({a:{b:1}}) + 1,
({a:{b:1}}).a + 1,
({a:{b:1}}).b + 1,
o + 1,
o.a + 1,
o.b + 1,
2
);
}
@@ -298,21 +306,25 @@ unsafe_object_nested: {
unsafe_object_complex: {
options = {
evaluate : true,
unsafe : true
evaluate: true,
reduce_vars: true,
toplevel: true,
unsafe: true,
}
input: {
var o = { a: { b: 1 }, b: 1 };
console.log(
({a:{b:1},b:1}) + 1,
({a:{b:1},b:1}).a + 1,
({a:{b:1},b:1}).b + 1,
({a:{b:1},b:1}).a.b + 1
o + 1,
o.a + 1,
o.b + 1,
o.a.b + 1
);
}
expect: {
var o = { a: { b: 1 }, b: 1 };
console.log(
({a:{b:1},b:1}) + 1,
({a:{b:1},b:1}).a + 1,
o + 1,
o.a + 1,
2,
2
);
@@ -322,22 +334,26 @@ unsafe_object_complex: {
unsafe_object_repeated: {
options = {
evaluate : true,
unsafe : true
evaluate: true,
reduce_vars: true,
toplevel: true,
unsafe: true,
}
input: {
var o = { a: { b: 1 }, a: 1 };
console.log(
({a:{b:1},a:1}) + 1,
({a:{b:1},a:1}).a + 1,
({a:{b:1},a:1}).b + 1,
({a:{b:1},a:1}).a.b + 1
o + 1,
o.a + 1,
o.b + 1,
o.a.b + 1
);
}
expect: {
var o = { a: { b: 1 }, a: 1 };
console.log(
({a:{b:1},a:1}) + 1,
o + 1,
2,
({a:{b:1},a:1}).b + 1,
o.b + 1,
1..b + 1
);
}
@@ -386,9 +402,9 @@ unsafe_function: {
expect: {
console.log(
({a:{b:1},b:function(){}}) + 1,
({a:{b:1},b:function(){}}).a + 1,
({a:{b:1},b:function(){}}).b + 1,
({a:{b:1},b:function(){}}).a.b + 1
({b:function(){}}, {b:1}) + 1,
({a:{b:1}}, function(){}) + 1,
({b:function(){}}, {b:1}).b + 1
);
}
expect_stdout: true
@@ -636,8 +652,8 @@ unsafe_prototype_function: {
var d = ({toString: 0}) + "";
var e = (({valueOf: 0}) + "")[2];
var f = (({toString: 0}) + "")[2];
var g = ({valueOf: 0}).valueOf();
var h = "" + ({toString: 0});
var g = ({}, 0)();
var h = ({}, 0)();
}
}