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465 Commits

Author SHA1 Message Date
Donny/강동윤
b34f1adbcc
build(cargo): Update rustc to 2023-07-03 (#7623) 2023-07-05 03:50:43 +00:00
Austaras
4f866de878
fix(es/minifier): Add usage to inlined ident eagerly (#7597) 
**Related issue:**

 - Closes #7591.
 2023-07-04 06:23:49 +00:00
Austaras
ff1ad95b59
feat(es/minifier): Compress common sub expressions in sequences (#7587) 2023-07-04 05:47:37 +00:00
Donny/강동윤
47d2edd4dc
feat(es/minifier): Drop unused properties (#7534) 
**Related issue:**

 - Closes #7472.
 2023-07-04 05:11:33 +00:00
Donny/강동윤
a685c88c61
fix(es/minifier): Don't drop assignments to unused top-level variables (#7581) 
**Related issue:**

 - Closes #7568
 2023-06-27 15:24:06 +00:00
Donny/강동윤
398e922ca0
feat(es/minifier): Inline constants even if they are exported (#7583) 
**Related issue:**

 - Closes #7575.
 2023-06-27 02:14:09 +00:00
Donny/강동윤
07a858030c
feat(es/minifier): Enable hoist_props by default (#7535) 2023-06-21 18:38:35 +09:00
Donny/강동윤
3ad07a7d2e
feat(es/minifier): Support __NO_SIDE_EFFECTS__ (#7532) 
**Related issue:**

 - Closes #7525.
 2023-06-21 07:25:29 +00:00
Donny/강동윤
aa83584634
refactor(es/ast): Reimplement optional chaining (#7441) 
**Related issue:**

 - Closes #7003.
 - Closes #7156.
 2023-06-12 06:47:40 +00:00
Austaras
7f9f0b8bce
fix(es/minifier): Infect mutation when assigning a property (#7503) 2023-06-08 04:13:42 +00:00
David Sherret
064bcf4854
fix(es/codegen): Remove extra spaces in AssignPatProp and KeyValuePatProp (#7488) 
Co-authored-by: Donny/강동윤 <kdy1997.dev@gmail.com>
 2023-06-07 05:08:35 +00:00
Austaras
62075faeaa
feat(es/minifier): Remove unused labels (#7478) 2023-06-07 04:23:40 +00:00
Donny/강동윤
e506635f74
fix(es/minifier): Don't generate generator arrows (#7466) 
**Related issue:**

 - Closes #7457.
 2023-05-31 01:57:13 +00:00
Austaras
0cd2b61b05
feat(es/minifier): Inline for loop variables (#7445) 2023-05-25 03:59:02 +00:00
Austaras
40d2bf7ec3
fix(es/minifier): Prevent inlining vars assigned outside current function scope (#7414) 
**Related issue:**

 - Closes #7412.
 2023-05-19 13:35:50 +09:00
Austaras
5dbbbea2ef
fix(es/minifier): Mark all function params as potential property mutation (#7409) 
**Description:**

This issue is more severe than I originally thought. It raises not in
array indexing, but in function calls and property mutation. We should
treat all function arguments as potentially be property mutated,
otherwise following example

```js
class A {
	a = 1

	toString() {
		return this.a
	}
}

const a = new A()

function foo(x) {
	x.a++
}

const b = a + 1

foo(a)

console.log(b)
```

would be error(It should log 2, but logs 3 after compress).

As the result, massive regressions is unavoidable, since some of these
optimizations may indeed cause error. Part of them can be mitigated with
following optimization -- allow inline of ident even if its original
value is mutated. Consider

```js
export function foo(x) {
   const y = x
   x.a = 1
   y.b = 2
}
```

If x is a primitive value, all mutations to its properties are ignored;
if x is a object, then y refers to the same object no matter what
mutation is performed.

And there's still room for more, currently following code
```js
export function foo(x) {
    const y = Math.floor(x);
    g(y);
}
```
But I'd rather do it in a separate PR.


**Related issue:**

 - Closes #7402.
 2023-05-18 01:19:17 +00:00
Donny/강동윤
f9cdd741c2
test(es/minifier): Enable more terser tests (#7396) 2023-05-16 03:21:08 +00:00
Donny/강동윤
041b491466
feat(es/parser): Implement explicit resource management (#7322) 
**Description:**

 - Add `UsingDecl`.
 - Add `UsingDecl` to `Decl`.
 - Rename `VarDeclOrPat` to `ForHead`.
 - Add `UsingDecl` to `ForHead`.
 - Implement parser for using declarations.

**Related issue:**

 - #7316.
 2023-05-10 04:16:44 +00:00
Donny/강동윤
1dced17998
fix(es/minifier): Fix remapping of vars upon inlining (#7362) 
**Related issue:**

 - Closes #7331.
 2023-05-10 03:31:15 +00:00
Donny/강동윤
246300ae25
feat(es/minifier): Drop expressions using sequential inliner (#6936) 2023-04-29 22:19:00 +09:00
Donny/강동윤
0aab90c005
fix(es/minifier): Fix a inliner bug related to Script (#7288) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7287.
 2023-04-19 07:22:48 +00:00
Donny/강동윤
4c06a56e52
fix(es/minifier): Use UTF16 length for str.length (#7275) 
**Related issue:**

 - Closes #7274.
 2023-04-15 14:50:52 +00:00
Austaras
93a264c9a4
fix(es/renamer): Ensure that param and function body are in same scope (#7271) 
**Description:**

The problem arises in L235 of swc_ecma_transforms_base/src/rename/mod.rs

```rs
unit!(visit_mut_fn_decl, FnDecl, true);
```

which calls `get_map` and evals to

```rs
node.visit_children_with(&mut v);
```

with `FnDecl` and `Analyzer` in L132. However, in `Analyzer`, a visit to raw function was not overloaded, so function arguments and function body are considered different scopes.

**Related issue:**

 - Closes #7261.
 2023-04-15 04:19:52 +00:00
Donny/강동윤
a44fea1ec8
fix(es/minifier): Fix handling of optional chaining when hoist_props is enabled (#7246) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7228.
 2023-04-13 03:23:29 +00:00
Donny/강동윤
559d1202bc
feat(es/minifier): Support PURE comment of seq exprs (#7245) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7241.
 2023-04-11 04:48:11 +00:00
Donny/강동윤
73bc29eeb0
fix(es/minifier): Don't remove used var decl (#7200) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7194.
 2023-04-05 04:35:37 +00:00
magic-akari
3ca954b9f9
fix(es/helpers): Use snake_case for helpers (#7147) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7144.
 - Closes https://github.com/swc-project/swc/issues/7118.
 2023-03-31 15:15:21 +09:00
Donny/강동윤
0259a7465f
build(cargo): Update rustc to nightly-2023-03-20 (#7170) 
**Description:**

This PR also updates `rkyv` to `=0.7.40`.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6807.
 2023-03-30 08:06:02 +00:00
Donny/강동윤
12546c853a
build(cargo): Revert rustc upgrade (#7162) 
**Description:**

The `rkyv` bug is not fixed.
 2023-03-29 17:48:45 +09:00
Donny/강동윤
e445502072
build(cargo): Update rustc to nightly-2023-03-28 (#7154) 
**Description:**

This PR also updates `rkyv` to `=0.7.40`.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6807.
 2023-03-29 06:24:19 +00:00
Donny/강동윤
6d9763e8c0
fix(es/renamer): Don't use symbols used by declarations if eval exists (#7116) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6971.
 - Closes https://github.com/swc-project/swc/issues/7094.
 2023-03-22 06:31:43 +00:00
Donny/강동윤
610e1bb581
fix(es/minifier): Don't inline into arrow heads (#7099) 
**Related issue:**

 - https://github.com/vercel/next.js/issues/47005
 2023-03-22 02:24:13 +00:00
Donny/강동윤
6a570a334c
fix(es/ast): Fix EqIgnoreSpan impl of Number (#7112) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7111.
 2023-03-21 08:46:22 +00:00
Anders Kaseorg
493a4f7042
fix(es/minifier): Remove wrong optimization of new RegExp(…) (#7091) 2023-03-17 03:22:02 +00:00
Donny/강동윤
86295ba8f2
fix(es/minifier): Preserve delete of unresolved variables (#7072) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7045.
 2023-03-15 02:31:08 +00:00
Donny/강동윤
963c460613
refactor: Fix lints using clippy from nightly-2023-03-13 (#6920) 2023-03-14 04:56:21 +00:00
Donny/강동윤
a9fe1d2d22
perf(es/ast): Shrink size of Expr (#7041) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7019.
 2023-03-09 13:34:11 +00:00
Austaras
1318afe2b4
fix(es/minifier): Bailout regex optimization on invalid flags (#7020) 2023-03-07 11:05:04 +09:00
magic-akari
bb2486c459
fix(es/minifier): Don't create invalid property names (#7010) 2023-03-04 17:58:49 +09:00
Austaras
06cbb9002d
feat(es/minifier): Optimize calls to Boolean/Number/String/Symbol (#7006) 2023-03-04 04:14:14 +00:00
Austaras
cfeb088c37
fix(es/minifier): Don't skip expressions with side effects from seq inliner (#7007) 2023-03-04 12:32:15 +09:00
magic-akari
a27ffd2242
feat(es/minifier): Drop unused import bindings (#6967) 2023-02-21 06:22:25 +00:00
magic-akari
1dfadb8790
fix(es/minifier): Fix optimization of expressions in numeric context (#6965) 2023-02-20 05:28:28 +00:00
magic-akari
9382bda786
fix(es/minifier): Fix toFixed, toPrecision, toExponential and toString of Number (#6960) 2023-02-19 23:18:14 +09:00
Donny/강동윤
725d3fb645
fix(es/minifier): Don't skip shorthand properties from sequential inliner (#6918) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6914.
 2023-02-09 03:07:31 +00:00
Donny/강동윤
951dafbc1a
fix(es/minifier): Don't break ternary with assignment in test (#6906) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6903.
 2023-02-08 02:10:44 +00:00
Donny/강동윤
432dca647b
fix(es/minifier): Respect span hygiene from expr simplifier (#6899) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6896.
 2023-02-07 05:14:19 +00:00
Austaras
c0e72ef64a
fix(es/minifier): Track reassign in parent scope (#6865) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6864.
 2023-01-28 17:19:19 +00:00
Donny/강동윤
d1687d8e01
feat(es/minifier): Improve compatibility of arrows with terser (#6862) 
**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/6123.
 2023-01-27 14:36:12 +09:00
Austaras
55225cb994
refactor(es/minifier): Merge cond_init with reassigned (#6850) 
**Description:**

And optimize the following situation
```js
export function genElement(el, state) {
    if ('slot' === el.tag) return el1 = el, genChildren(el1);
    if (el.component) {
        var el1
        return 999;
    }
}
```
which rarely happens in hand written JS, but is often generated by swc merge variable pass.
 2023-01-26 10:17:33 +09:00