JoBoEVD/UglifyJS
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220 Commits

Author SHA1 Message Date
Alex Lam S.L
1b61a81b5d
enhance collapse_vars (#3613) 2019-11-29 17:45:49 +08:00
Alex Lam S.L
168ae747ad
enhance collapse_vars (#3611) 2019-11-28 03:57:10 +08:00
Alex Lam S.L
d4b7010678
fix corner case in unsafe_regexp (#3609) 2019-11-27 17:35:21 +08:00
Alex Lam S.L
81caadb709
enhance collapse_vars (#3602) 2019-11-20 12:54:49 +08:00
Alex Lam S.L
c289ba1139
fix corner case in collapse_vars (#3597) 
fixes #3596
 2019-11-19 02:30:52 +08:00
Alex Lam S.L
10c1a78772
fix corner case in collapse_vars (#3591) 2019-11-17 05:24:02 +08:00
Alex Lam S.L
fe65ce9658
fix corner case in collapse_vars (#3582) 
fixes #3581
 2019-11-13 16:45:16 +08:00
Alex Lam S.L
d6fd18d0b0
enhance evaluate & inline (#3580) 2019-11-13 04:17:09 +08:00
Alex Lam S.L
87e67ec299
fix corner case in collapse_vars (#3574) 
fixes #3573
 2019-11-07 20:38:03 +08:00
Alex Lam S.L
3e2c51a4da
enhance collapse_vars (#3572) 2019-11-05 18:15:28 +08:00
Alex Lam S.L
24bb288832
fix corner case in collapse_vars (#3563) 
fixes #3562
 2019-11-01 22:38:19 +08:00
Alex Lam S.L
85237b08d4
fix corner case in collapse_vars (#3527) 
fixes #3526
 2019-10-26 05:41:02 +08:00
Alex Lam S.L
0f7aa41e33
fix corner case in collapse_vars (#3521) 
fixes #3520
 2019-10-24 01:13:57 +08:00
Alex Lam S.L
0b3705e82f
fix corner cases in inline (#3507) 
fixes #3506
 2019-10-22 15:41:55 +08:00
Alex Lam S.L
ca6dce43fe
fix corner case in collapse_vars (#3501) 2019-10-20 03:53:20 +08:00
Alex Lam S.L
d3d1d11926
fix corner case in ie8 & rename (#3474) 
fixes #3473
 2019-10-15 07:27:02 +08:00
Alex Lam S.L
35338a100f
handle function/variable name collisions correctly (#3451) 
fixes #3439
 2019-10-06 08:51:38 +08:00
Alex Lam S.L
a21c348d93
improve sandbox fidelity (#3415) 2019-05-15 23:26:57 +08:00
Alex Lam S.L
5476cb8f05
fix corner case in inline (#3401) 
fixes #3400
 2019-05-10 01:22:44 +08:00
Alex Lam S.L
2ea96549c5
unify logging functionality (#3392) 
fixes #3253
fixes #3254
 2019-04-30 06:32:24 +08:00
Alex Lam S.L
f01cc1e413
unwind IIFE class patterns (#3373) 
fixes #2332
 2019-04-21 09:49:07 +08:00
Alex Lam S.L
65648d84a5
enhance collapse_vars (#3351) 2019-03-20 23:31:21 +08:00
Alex Lam S.L
615ae37ca3
introduce assignments (#3345) 2019-03-18 21:28:41 +08:00
Alex Lam S.L
b3ef5e514d
enhance evaluate (#3339) 
fixes #3299
 2019-03-15 02:48:23 +08:00
Alex Lam S.L
d074aa6e27
fix corner case in collapse_vars (#3333) 
fixes #3247
fixes #3305
fixes #3314
fixes #3327
 2019-03-13 23:48:52 +08:00
Alex Lam S.L
f352bcec3a
fix corner case in collapse_vars (#3239) 
fixes #3238
 2018-08-29 11:34:34 +08:00
Alex Lam S.L
cea685f8d9
fix corner case in ie8 (#3216) 
fixes #3215
 2018-07-19 14:45:36 +08:00
alexlamsl
5ffc17d4aa fix corner case in unused 2018-07-01 14:34:42 +08:00
Alex Lam S.L
9e19e63551
general clean-ups (#3175) 2018-06-06 17:50:56 +08:00
Alex Lam S.L
4fc39d8dad
fix corner case in collapse_vars (#3139) 2018-05-19 05:45:14 +08:00
Alex Lam S.L
f37b91879f
fix various corner cases (#3123) 2018-05-05 13:17:50 +08:00
Alex Lam S.L
70d4477e05
workaround vm context issue in node-chakracore (#3106) 2018-04-27 07:40:34 +08:00
Alex Lam S.L
9e87edfc2e
better fix for #2506 (#3099) 2018-04-25 04:46:07 +08:00
Alex Lam S.L
27211cf2d5
handle RHS side-effects in collapse_vars (#3097) 
fixes #3096
 2018-04-24 20:31:50 +08:00
Alex Lam S.L
06b9894c19
handle modifications to this correctly (#3036) 
fixes #3032
 2018-03-30 15:07:36 +09:00
Alex Lam S.L
ccf0e2ef4f
extend fuzzy RHS folding (#3006) 
- `a = []; if (1) x();` => `if (a = []) x();`
 2018-03-17 03:10:21 +08:00
Alex Lam S.L
fe51a91395
handle negated constants correctly in collapse_vars (#2975) 
fixes #2974
 2018-03-06 00:45:58 +08:00
Alex Lam S.L
0daa199fa8
migrate safe transformations out of unsafe_comps (#2962) 
fixes #2959
 2018-02-28 22:02:24 +08:00
Alex Lam S.L
73e98dcda4
drop side_effects-free return values (#2965) 2018-02-28 19:59:19 +08:00
Alex Lam S.L
36bca6934d
enhance collapse_vars (#2952) 
- `a = b, b` => `a = b`
- `a.b = c, c()` => `(a.b = c)()`
 2018-02-28 15:19:32 +08:00
Alex Lam S.L
b8b2ac5230
improve fix for #2954 (#2958) 2018-02-26 03:14:22 +08:00
Alex Lam S.L
ea2359381b
fix collapse_vars on nested exception (#2955) 
fixes #2954
 2018-02-25 15:39:00 +08:00
Alex Lam S.L
4b5993ff15
fix crash in may_throw() (#2932) 
fixes #2931
 2018-02-18 21:51:27 +08:00
Alex Lam S.L
7fdd2082a6
drop unused "class" definition IIFEs (#2923) 
fixes #805
 2018-02-17 05:11:31 +08:00
Alex Lam S.L
83d8aa8b12
fix collapse_vars within loops (#2915) 
fixes #2914
 2018-02-14 05:15:52 +08:00
Alex Lam S.L
0c4f315c02
fix corner case in collapse_vars (#2909) 
fixes #2908
 2018-02-13 01:41:22 +08:00
Alex Lam S.L
d66d86f20b
account for exceptions in AST_Assign.left (#2892) 
fixes #2891
 2018-02-08 03:31:51 +08:00
Alex Lam S.L
3026bd8975
improve exceptional flow compression by collapse_vars (#2880) 2018-02-04 04:18:22 +08:00
Alex Lam S.L
78a44d5ab0
maintain order between side-effects and externally observable assignments (#2879) 
fixes #2878
 2018-02-04 03:58:49 +08:00
Alex Lam S.L
7e13c0db40
handle break & continue in collapse_vars (#2875) 
fixes #2873
 2018-02-03 07:58:43 +08:00
Alex Lam S.L
e6a2e9e4d0
allow collapse_vars across conditional branches (#2867) 2018-02-03 02:44:40 +08:00
Alex Lam S.L
b16380d669
fix missing corner case in #2855 (#2868) 2018-02-02 18:08:56 +08:00
Alex Lam S.L
102f994b9d
account for declaration assignment in collapse_vars (#2859) 
fixes #2858
 2018-02-01 15:09:53 +08:00
Alex Lam S.L
2a4c68be4f
relax collapse_vars on AST_Exit (#2855) 
First introduced in #1862 to stop assignments to migrate beyond `return` or `throw`. Since then `collapse_vars` has been improved to handle various side-effect-related corner cases.
 2018-01-31 23:49:59 +08:00
Alex Lam S.L
6fa3fbeae8
compress chained compound assignments (#2850) 2018-01-29 15:13:25 +08:00
Alex Lam S.L
3e7873217c
improve unused on built-in functions (#2817) 2018-01-19 20:41:57 +08:00
Alex Lam S.L
b4aef753e7
general improvements around AST_ForIn (#2796) 
- compress using `collapse_vars`
- remove unused `name`
- simplify `loop_body`
 2018-01-16 17:03:12 +08:00
Alex Lam S.L
10f961c27b
enhance collapse_vars (#2788) 2018-01-15 18:47:23 +08:00
Alex Lam S.L
2972d58dbb
patch variable declaractions extracted within catch (#2753) 
fixes #2749
 2018-01-09 13:54:35 +08:00
Alex Lam S.L
4832bc5d88
replace single-use recursive functions (#2659) 
fixes #2628
 2017-12-26 21:25:35 +08:00
Alex Lam S.L
b29fc8b27c
improve transversal efficiency in collapse_vars (#2611) 
fixes #2603
 2017-12-18 03:00:05 +08:00
Alex Lam S.L
8f681b1d17
handle inline of function arguments (#2590) 
fixes #2476
 2017-12-15 13:28:30 +08:00
Alex Lam S.L
738fd52bc4
improve collapse_vars (#2591) 
- handle single-use assignments other than `AST_VarDef`
- scan `AST_Call` for candidates
 2017-12-14 15:31:35 +08:00
Alex Lam S.L
9a137e8613
drop local assign-only variable in return (#2587) 2017-12-14 02:59:59 +08:00
Alex Lam S.L
ef618332ea
fold cascade functionality into collapse_vars (#2586) 2017-12-14 01:20:36 +08:00
Alex Lam S.L
7f418978c9
recover lost opportunities from #2574 (#2584) 2017-12-13 18:20:53 +08:00
Alex Lam S.L
04cc395c35
improve collapse_vars on side-effect-free replacements (#2583) 2017-12-13 04:52:54 +08:00
Alex Lam S.L
ebfd5c5c74
fix AST_VarDef.may_throw() (#2580) 2017-12-12 03:30:25 +08:00
Alex Lam S.L
f2ad542679
fix collapse_vars on switch (#2578) 2017-12-11 18:11:09 +08:00
Alex Lam S.L
0e16d92786
handle exceptional flow correctly in collapse_vars (#2574) 
fixes #2571
 2017-12-11 00:16:02 +08:00
Alex Lam S.L
32def5ebf5
improve synergy between collapse_vars & unused (#2521) 2017-11-28 14:02:39 +08:00
Alex Lam S.L
ecc9f6b770
drop assignment in AST_VarDef.value (#2522) 
fixes #2516
 2017-11-28 13:08:40 +08:00
Alex Lam S.L
eb001dc1d9
fix argument/atom collision by collapse_vars (#2507) 
fixes #2506
 2017-11-24 07:26:22 +08:00
Alex Lam S.L
8987780db6
eliminate invalid state caching in collapse_vars (#2502) 
fixes #2497
 2017-11-24 04:12:37 +08:00
Alex Lam S.L
49fbe9c5ac
fix replacement logic in collapse_vars (#2475) 2017-11-13 07:37:42 +08:00
Alex Lam S.L
c6cfa04d10
allow symbol replacement on multiple occurrences (#2472) 
- all-or-nothing replacement
- avoid unmangleable names

fixes #2436
 2017-11-12 22:31:47 +08:00
Alex Lam S.L
3c74047368
implement compress option reduce_funcs (#2466) 
- inline single-use function declarations as expressions when permissible
- depend on `reduce_vars`
- enabled by default
- disable for speed critical code

fixes #2464
 2017-11-11 05:59:35 +08:00
Alex Lam S.L
1127a2caf3
fix multiple nested function substitutions (#2458) 
fixes #2449
 2017-11-09 23:30:00 +08:00
Alex Lam S.L
6c45101870
consolidate & enhance unused (#2439) 
- defer declaration removal in `collapse_vars`
- account for `AST_SymbolFunarg` in deduplication
- private accounting for `collapse_vars`
- avoid issues with identity reference due to deep cloning

fixes #2437
 2017-11-06 14:25:10 +08:00
Alex Lam S.L
fe5a68f9d5
maintain call argument order in collapse_vars (#2426) 
fixes #2425
 2017-11-05 00:00:18 +08:00
Alex Lam S.L
8a713e449f deduplicate declarations regardless of toplevel (#2393) 2017-10-23 01:00:50 +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
0f2ef3367c enhance collapse_vars around lazy operations (#2369) 2017-10-19 04:52:00 +08:00
Alex Lam S.L
7e5b5cac97 fix AST_PropAccess in collapse_vars (take 3) (#2375) 
Suppress scanning beyond assignment to `a.b`
 2017-10-18 02:54:51 +08:00
Alex Lam S.L
0d2fe8e3ef fix AST_PropAccess in collapse_vars (take 2) (#2372) 
fixes #2364
 2017-10-17 22:59:15 +08:00
Alex Lam S.L
f2b9c11e2a fix AST_PropAccess in collapse_vars (#2370) 
fixes #2364
 2017-10-17 18:33:03 +08:00
Alex Lam S.L
fe647b083e account for side-effects from AST_This in collapse_vars (#2365) 2017-10-17 01:18:55 +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
Alex Lam S.L
1abe14296e collapse a.b whenever safe (#2350) 2017-10-08 13:17:48 +08:00
Alex Lam S.L
00f509405b suppress collapse_vars of this into "use strict" (#2326) 
fixes #2319
 2017-09-20 05:23:20 +08:00
Alex Lam S.L
4f0953f7e9 handle LHS side-effects on cascade & collapse_vars (#2314) 
fixes #2313
 2017-09-16 11:45:19 +08:00
Alex Lam S.L
395a17ccda fix collapse_vars on default function argument (#2299) 
Avoid collision with local variable `undefined` under certain corner cases.

fixes #2298
 2017-09-04 02:32:33 +08:00
Alex Lam S.L
5229cb2b1b drop unused compound assignments (#2230) 
fixes #2226
 2017-07-14 00:39:34 +08:00
Alex Lam S.L
71ee91e716 handle duplicate argument names in collapse_vars (#2215) 2017-07-08 04:42:35 +08:00
Alex Lam S.L
9306da3c58 suppress collapse_vars of this as call argument (#2204) 
fixes #2203
 2017-07-06 01:03:52 +08:00
Alex Lam S.L
8b69a3d18e drop argument value after collapse_vars (#2190) 2017-07-02 04:28:11 +08:00
Alex Lam S.L
d40950b741 improve inline efficiency (#2188) 
... by teaching `collapse_vars` some new tricks.

fixes #2187
 2017-07-02 01:05:14 +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
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
1d407e761e fix invalid transform on const (#1919) 
- preserve (re)assignment to `const` for runtime error
- suppress `cascade` on `const`, as runtime behaviour is ill-defined
 2017-05-12 04:51:44 +08:00
Alex Lam S.L
dee5a27516 enhance collapse_vars (#1862) 
- extend expression types
  - `a++`
  - `a=x;`
- extend scan range
  - `for(init;;);`
  - `switch(expr){case expr:}`
  - `a = x; a = a || y;`
- terminate upon `debugger;`

closes #1821
fixes #27
fixes #315
fixes #1858
 2017-05-06 16:15:43 +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
4dcff038cb improve collapse_vars on AST_Var (#1828) 
Perform the same cascaded scanning within `var` statement as we do on array of statements.
 2017-04-19 04:49:09 +08:00
Alex Lam S.L
0f4f01b66c clean up collapse_vars (#1826) 
- remove overlap in functionality of singular, consecutive reference of constant value
- remove workarounds for previous bugs in `lib/scope.js`
- distribute recursive `collapse_single_use_vars()` calls to their respective `OPT(AST_Node)`
- enable collapsing of variables within a single `AST_Definitions`
 2017-04-18 21:45:34 +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
06cdb74279 improve pure_getters (#1786) 
- property access to `null` & `undefined` always has side effects
- utilise `reduce_vars` to determine safe property access
- may-be cases treated as side effects unless `unsafe`
 2017-04-06 11:18:59 +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
e918748d88 improve collapsible value detection (#1638) 
- #1634 bars variables with cross-scope references in between to collapse
- but if assigned value is side-effect-free, no states can be modified, so it is safe to move
 2017-03-24 02:55:32 +08:00
Alex Lam S.L
48ffbef51d account for cross-scope modifications in collapse_vars (#1634) 
mostly done by @kzc

fixes #1631
 2017-03-23 07:17:34 +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
Alex Lam S.L
5ae04b3545 make collapse_vars consistent with toplevel (#1608) 
fixes #1605
 2017-03-16 13:22:26 +08:00
kzc
3ac2421932 collapse_vars: do not replace a constant in loop condition or init (#1562) 2017-03-07 01:42:33 +08:00
kzc
4d63d4f5b3 collapse_vars should not replace constant in for-in init section (#1538) 
fixes #1537
 2017-03-03 03:51:15 +08:00
kzc
ee3b39b909 optimize trivial IIFEs returning constants (#1530) 2017-03-02 15:11:40 +08:00
alexlamsl
148047fbbf drop unused: toplevel, assign-only 
- assign statement does not count towards variable usage by default
- only works with assignments on the same scope level as declaration
- can be disabled with `unused` set to "keep_assign"
- `toplevel` to drop unused top-level variables and/or functions
- `top_retain` to whitelist top-level exceptions

closes #1450
 2017-02-21 13:29:57 +08:00
kzc
09d5707a8a collapse_vars: Do not consider RegExp literals to be constants 
Fixes #1100
 2016-05-27 00:03:51 -04:00
kzc
929de2b0de collapse_vars: fix if/else and ternary operator side effects 2016-01-28 12:17:06 -05:00
kzc
af2472d85e collapse_vars: fix bug in repeated var defs of same name 2016-01-28 16:48:50 +01:00
kzc
0a38a688f9 fix bug in collapse_vars for right side of "||" and "&&" 2016-01-27 14:18:46 -05:00
kzc
f4c2ea37bf Collapse single use var definitions 
Fix #721
 2016-01-27 11:48:15 +02:00