JoBoEVD/UglifyJS
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116 Commits

Author SHA1 Message Date
Alex Lam S.L
a8aa28a7a6 consolidate single-use function reduction (#2427) 
fixes #2423
 2017-11-05 04:27:01 +08:00
Alex Lam S.L
c8b6f4733d reduce this within functions (#2421) 
- only replace same-scope usages
- augment `test/ufuzz.js` to test for `this`


fixes #2420
 2017-11-04 00:31:37 +08:00
alexlamsl
086cb33163 Merge branch 'master' into harmony-v3.1.6 2017-10-29 13:23:39 +08:00
Alex Lam S.L
8428326ea1 enhance properties (#2412) 
- trim array items only if `side_effects`
- extend to non-identifier properties
 2017-10-29 04:11:26 +08:00
Alex Lam S.L
6371e2ee63 consistently reduce const safe literals (#2411) 
fixes #2406
 2017-10-28 11:36:44 +08:00
Alex Lam S.L
74ae16f9f8 fix unsafe reduce_vars on arrays & objects (#2397) 2017-10-24 22:10:36 +08:00
Alex Lam S.L
86ea38a259 enhance unsafe evaluate of arrays & objects (#2394) 2017-10-24 02:58:30 +08:00
Alex Lam S.L
24aa07855b safer properties transform (#2391) 
`{ a: x, b: y }.a` => `[ x, y ][0]`
- `x` cannot be function containing `this`

`[ x, y, z ][1]` => `(x, z, y)`
- only if `z` is side-effect-free
 2017-10-22 20:10:13 +08:00
Alex Lam S.L
011123223b fix unsafe escape analysis in reduce_vars (#2387) 2017-10-22 03:23:31 +08:00
alexlamsl
9f1c72ae28 update test 
Sub-optimal result due to block scope.
 2017-10-22 00:38:16 +08:00
alexlamsl
c60fa67827 Merge branch 'master' into harmony-v3.1.5 2017-10-22 00:35:00 +08:00
Alex Lam S.L
c927cea632 unsafe fix-ups for #2351 (#2379) 2017-10-21 04:08:26 +08:00
alexlamsl
d8ee2de95c adjust tests for #2351 2017-10-16 13:24:50 +08:00
alexlamsl
58a5608b66 Merge branch 'master' into harmony-v3.1.4 2017-10-16 12:32:50 +08:00
Alex Lam S.L
eba0f93bc0 more tests for #2351 (#2357) 2017-10-12 02:58:25 +08:00
Alex Lam S.L
b810e2f8da perform reduce_vars on safe literals (#2351) 
- constant expression
- single reference
- same scope
- not across loop body
 2017-10-09 12:25:06 +08:00
alexlamsl
744032755d add tests for #2336 & #2337 2017-10-01 13:20:17 +08:00
alexlamsl
4fac8076b8 Merge branch 'master' into harmony-v3.1.3 2017-10-01 12:42:40 +08:00
Alex Lam S.L
dd71639264 enhance reduce_vars for AST_Accessor (#2339) 
fixes #2336
 2017-10-01 03:01:50 +08:00
alexlamsl
a556dd2dcb Merge branch 'master' into harmony-v3.0.24 2017-07-08 13:12:54 +08:00
Alex Lam S.L
1ac25fc032 improve compress granularity through typeofs (#2201) 
fixes #2198
 2017-07-05 19:20:33 +08:00
alexlamsl
11afa816e3 Merge branch 'master' into harmony-v3.0.20 2017-06-25 16:43:44 +08:00
Alex Lam S.L
3d5bc08185 fix reduce_vars on this (#2145) 
fixes #2140
 2017-06-23 04:44:57 +08:00
alexlamsl
8af362ed57 Merge branch 'master' into harmony-v3.0.16 2017-06-14 17:09:30 +08:00
Alex Lam S.L
68138f2281 fix reduce_vars on AST_Arrow (#2091) 
fixes #2090
 2017-06-14 16:40:37 +08:00
Alex Lam S.L
3493a182b2 implement function inlining (#2053) 
- empty body
- single `AST_Return`
- single `AST_SimpleStatement`
- avoid `/*#__PURE__*/`

Miscellaneous
- enhance single-use function substitution

fixes #281
 2017-06-06 05:49:53 +08:00
Alex Lam S.L
540220b91b fix AST_Function scope invariance (#2052) 
improve function name hack in `run_code()`
 2017-06-04 19:27:43 +08:00
alexlamsl
cd6e849555 Revert "remove support for const (#1910)" 
This reverts commit c391576d52.
 2017-05-15 18:38:16 +08:00
Alex Lam S.L
3ca902258c fix bugs with getter/setter (#1926) 
- `reduce_vars`
- `side_effects`
- property access for object
- `AST_SymbolAccessor` as key names

enhance `test/ufuzz.js`
- add object getter & setter
  - property assignment to setter
  - avoid infinite recursion in setter
- fix & adjust assignment operators
  - 50% `=`
  - 25% `+=`
  - 2.5% each for the rest
- avoid "Invalid array length"
- fix `console.log()`
  - bypass getter
  - curb recursive reference
- deprecate `-E`, always report runtime errors
 2017-05-14 02:10:34 +08:00
Alex Lam S.L
c391576d52 remove support for const (#1910) 
As this is not part of ES5.
 2017-05-12 14:57:41 +08:00
Alex Lam S.L
ac73c5d421 avoid arguments and eval in reduce_vars (#1924) 
fixes #1922
 2017-05-12 12:34:55 +08:00
Alex Lam S.L
98cf95e5b5 fix test for #1865 (#1873) 2017-05-07 02:56:02 +08:00
Alex Lam S.L
2c7ee956fd fix unsafe on evaluate of reduce_vars (#1870) 
Determine if variables with non-constant values can escape and be modified.

fixes #1865
 2017-05-06 23:18:55 +08:00
Alex Lam S.L
2cb55b2ad0 enforce toplevel on other compress options (#1855) 
Respect "funcs" and "vars" properly.

fixes #1850
 2017-04-30 22:52:36 +08:00
Alex Lam S.L
f05d4f7af3 improve unused (#1832) 
- extract leading value with side-effects out of `var` statement
- reduce scanning of `AST_Definitions` from 3 passes to just once
 2017-04-20 13:06:14 +08:00
Alex Lam S.L
5d9f1da3ab support safe reassignments in reduce_vars (#1823) 
`var a=1;a=2;x(a)` => `x(2)`

fix pre-existing issues
- reference counting on assignment
- walking of anonymous functions
- chained assignment
 2017-04-18 13:38:42 +08:00
Alex Lam S.L
d1aa09c5c7 fix reduce_vars on conditionals (#1822) 2017-04-18 01:44:23 +08:00
Alex Lam S.L
6d5f341999 fix reduce_vars on boolean binary expressions (#1819) 
Side effects of `&&` and `||` have not mattered until #1814, which takes assignment expressions into account.
 2017-04-17 17:24:29 +08:00
Alex Lam S.L
4ffb6fce76 compress duplicated variable definitions (#1817) 
These are surprisingly common, as people reuse the same variable name within loops or switch branches.
 2017-04-17 17:11:29 +08:00
Alex Lam S.L
71a8d0d236 fix reduce_vars within try-block (#1818) 
Possible partial execution due to exceptions.
 2017-04-17 14:03:29 +08:00
Alex Lam S.L
1a498db2d3 enhance reduce_vars (#1814) 
- allow immediate assignment after declaration of variable
- relax modification rule for immutable value
- fix order of visit for TreeWalker
- remove extraneous code
 2017-04-17 01:36:50 +08:00
Alex Lam S.L
44dfa5a318 fix variable substitution (#1816) 
- let `collapse_vars` take care of value containing any symbols
- improve overhead accounting
 2017-04-16 17:25:39 +08:00
Alex Lam S.L
0f4cd73dcc introduce "strict" to pure_getters (#1795) 2017-04-07 13:31:58 +08:00
Alex Lam S.L
281e882d27 fix reduce_vars on catch variable (#1794) 
Improved catch handling in `figure_out_scope()` means special case treatment of IE8 is no longer valid in `reset_opt_flags()`.

Also fixed recursive assignment in variable definition.
 2017-04-07 12:32:56 +08:00
Alex Lam S.L
cc6aa3e5ac fix incorrect context in variable substitution (#1791) 
`AST_Node.optimize()` is context-aware, so don't cache its results to be used elsewhere.

Also fixed a few cases of AST corruption and beef up safety of `pure_getters`.
 2017-04-07 03:42:17 +08:00
Alex Lam S.L
f7ca4f2297 fix corner cases in switch and undefined (#1762) 
- fix side effects in switch condition for singular blocks
- fix `undefined` confusion with local variable
- gate `OPT(AST_Switch)` with `switches`

fixes #1758
fixes #1759
 2017-04-02 14:52:25 +08:00
Alex Lam S.L
57ce5bd9e0 handle overlapped variable definitions (#1691) 
Process variable definitions with or without assigned values against:
- `arguments`
- named function arguments
- multiple definitions within same scope

Essentially demote variable declarations with no value assignments.

Also fixed invalid use of `AST_VarDef` over `arguments` - should use a member of `AST_SymbolDeclaration` instead.
 2017-03-27 01:30:21 +08:00
Alex Lam S.L
861a79ac9f fix delete related issues in collapse_vars and reduce_vars (#1689) 2017-03-26 19:14:30 +08:00
Alex Lam S.L
0a65de89b9 fix reduce_vars on AST_Switch (#1671) 
Take conditional nature of switch branches into account.

fixes #1670
 2017-03-25 21:17:30 +08:00
Alex Lam S.L
a3cc3a9b87 make expect_stdout work on Node.js 0.12 (#1623) 
That particular version of Node.js has messed up error messages, so provide a version-specific workaround.

Also fixed an formatting issue which would cause `expect_stdout` to fail if error message contains excerpts of input.

Apply `expect_stdout` to more applicable tests.
 2017-03-19 12:00:32 +08:00