JoBoEVD/UglifyJS
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218 Commits

Author SHA1 Message Date
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