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684 Commits

Author SHA1 Message Date
kzc
d600c78d7b have keep_quoted respect quoted method names (#2258) 
fixes #2257
 2017-07-28 19:42:12 +08:00
Alex Lam S.L
d3df2f985d extend collapse_vars to let and const (#2252) 
fixes #2250
 2017-07-25 22:07:21 +08:00
alexlamsl
98b850580b fix for #2242 on harmony 2017-07-23 16:20:53 +08:00
alexlamsl
29011ea60a remove ascii_identifiers 2017-07-23 12:54:50 +08:00
alexlamsl
77d18be073 Merge branch 'master' into harmony-v3.0.26 2017-07-23 12:53:13 +08:00
Alex Lam S.L
6a5e74b44e unescape surrogate pairs only (#2246) 
fixes #2242
 2017-07-23 12:38:21 +08:00
alexlamsl
3a2b737c42 Merge branch 'master' into harmony-v3.0.25 2017-07-16 11:15:07 +08:00
Alex Lam S.L
9e1da9235e ensure ie8 works with mangled properties (#2238) 
fixes #2234
 2017-07-15 22:50:59 +08:00
Alex Lam S.L
a5ffe2c23f drop unused builtin globals under unsafe (#2236) 
fixes #2233
 2017-07-15 15:16:11 +08:00
Alex Lam S.L
9282e7b0c6 fix unsafe evaluate of Object static methods (#2232) 
fixes #2231
 2017-07-14 19:52:01 +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
458e3e15f0 enhance passes (#2229) 
- remove hardcoded upper limit
- continue based on node count reduction
- emit verbose statistics

fixes #2226
 2017-07-13 02:18:59 +08:00
alexlamsl
ef63de6968 handle AST_Arrow IIFEs in collapse_vars 2017-07-08 14:27:06 +08:00
alexlamsl
2539fb8096 inline property access of AST_ConciseMethod 2017-07-08 14:25:58 +08:00
alexlamsl
a556dd2dcb Merge branch 'master' into harmony-v3.0.24 2017-07-08 13:12:54 +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
4f70d2e28c inlining of static methods & constants (#2211) 
- guard by `unsafe`
- support `Array`, `Math`, `Number`, `Object` & `String`

fixes #2207
 2017-07-07 05:35:32 +08:00
Alex Lam S.L
4b6ca5e742 inline property access of object literal (#2209) 
- only if property value is side-effect-free
- guard by `unsafe`

fixes #2208
 2017-07-06 21:51:58 +08:00
Alex Lam S.L
f5c46db738 improve AST_ConciseMethod compression (#2202) 
p(){return x;} ---> p:()=>x

Optimization subject to the `compress` option `arrows`.
 2017-07-06 01:21:04 +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
1ac25fc032 improve compress granularity through typeofs (#2201) 
fixes #2198
 2017-07-05 19:20:33 +08:00
kzc
fdbb1d09ef Convert p: function(){} to p(){} in object literals (#2199) 
when `compress` option `ecma` is 6 or greater.
 2017-07-04 14:35:58 +08:00
Alex Lam S.L
af0262b7e5 improve parenthesis emission (#2196) 
- eliminate `throw` usages
- suppress extraneous parenthesis
  - `new function() {foo.bar()}.baz`
  - `for (function() { "foo" in bar; };;);`
 2017-07-03 04:17:37 +08:00
alexlamsl
5ea1da2d42 handle AST_Expansion in collapse_vars & inline 2017-07-02 18:15:16 +08:00
alexlamsl
e77b6d525c Merge branch 'master' into harmony-v3.0.23 2017-07-02 17:47:21 +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
52cc21d999 remove extraneous ! before AST_Arrow (#2185) 2017-06-30 11:17:58 +08:00
kzc
a938fe5e1f async arrow function IIFE fix (#2184) 
fixes #2183
 2017-06-30 10:12:42 +08:00
kzc
07a5a57336 fix await parens for property access and calls (#2181) 
fixes #2179
 2017-06-30 09:14:24 +08:00
alexlamsl
087bce508a Merge branch 'master' into harmony-v3.0.21 2017-06-29 00:58:28 +08:00
Alex Lam S.L
4d5aeeddfb compress AST_Arrow properly (#2170) 2017-06-28 01:06:30 +08:00
Alex Lam S.L
f0a99125ee improve unsafe_Func (#2171) 
- minimise disturbance to `compute_char_frequency()`
- remove extraneous quotation marks
 2017-06-27 23:53:42 +08:00
Alex Lam S.L
1e4de2e6d3 parse @global_defs as expressions (#2169) 
- let parser rejects non-conformant input
- eliminate need for extraneous parenthesis
 2017-06-27 10:31:19 +08:00
Alex Lam S.L
ad139aa34d fix side_effects on AST_Expansion (#2165) 
fixes #2163
 2017-06-27 01:13:00 +08:00
alexlamsl
11afa816e3 Merge branch 'master' into harmony-v3.0.20 2017-06-25 16:43:44 +08:00
Alex Lam S.L
285401ced8 more tests for #2158 (#2160) 2017-06-25 14:21:48 +08:00
Alex Lam S.L
9db4c42380 fix cascade & collapse on property access of constants (#2158) 2017-06-24 21:30:06 +08:00
Alex Lam S.L
d1f085bce7 add new arrows compress option (#2154) 
Convert ES5 style anonymous function expressions
to arrow functions if permissible by language semantics.

Note: `arrows` requires that the `ecma` compress option
is set to `6` or greater.

fixes #2150
 2017-06-24 14:45:24 +08:00
Alex Lam S.L
7b95b63ca1 [ES6] support async arrow functions (#2153) 
fixes #2102
 2017-06-24 05:26:35 +08:00
Alex Lam S.L
dc6bcaa18e synchronise mangle.properties for minify() & test/compress (#2151) 2017-06-23 15:53:13 +08:00
Alex Lam S.L
137e4c4753 fix unused on AST_Destructuring (#2146) 2017-06-23 13:11:26 +08:00
Alex Lam S.L
3d5bc08185 fix reduce_vars on this (#2145) 
fixes #2140
 2017-06-23 04:44:57 +08:00
Alex Lam S.L
b163b13a0b fix export of keyword and redirection (#2143) 
fixes #2141
fixes #2142
 2017-06-23 03:49:30 +08:00
alexlamsl
f5931866e0 Merge branch 'master' into harmony-v3.0.19 2017-06-22 03:26:49 +08:00
Alex Lam S.L
471db8a717 fix inline & unused on AST_Expansion (#2138) 
- handle rest parameters
- suppress cases with spread arguments

fixes #2136
 2017-06-22 01:39:11 +08:00
Alex Lam S.L
8ba9e4e0da fix toplevel on export (#2137) 
fixes #2134
 2017-06-22 00:31:17 +08:00
Alex Lam S.L
71556d00b5 correctly parse export of function & class (#2135) 2017-06-21 23:15:39 +08:00
Alex Lam S.L
8709753bfb fix mangle on export (#2133) 
- `export default ...`
- `export` with `AST_Destructuring`

fixes #2129
 2017-06-21 14:22:09 +08:00
Alex Lam S.L
db877e8729 fix drop_unused() accounting of symbols within export function (#2132) 
fixes #2131
 2017-06-21 12:32:58 +08:00
Alex Lam S.L
11923e3ae8 reject non-toplevel import/export (#2128) 
fixes #2124
 2017-06-21 03:18:48 +08:00
Alex Lam S.L
62d1fbf645 support export statements properly (#2126) 
- mangle & compress correctly with `toplevel`
- retain non-toplevel import/export
- parse & output `export { variable as name }`
- remove extraneous spaces from `beautify`


fixes #2038
fixes #2124
 2017-06-21 00:51:36 +08:00
Alex Lam S.L
343ea326c2 ensure mangling works if catch reuses a scope variable (#2123) 
fixes #2120
 2017-06-20 02:14:05 +08:00
kzc
849ba79dee retain names in export default class and function (#2122) 
fixes #2121
 2017-06-19 14:30:59 +08:00
alexlamsl
daaf1273fa Merge branch 'master' into harmony-v3.0.18 2017-06-18 15:49:49 +08:00
Alex Lam S.L
0a0f4f5591 make defensive copies when inline (#2116) 
fixes #2114
 2017-06-17 14:32:37 +08:00
Alex Lam S.L
931daa85bf fix loss of context in collapse_vars & cascade (#2112) 
fixes #2110
 2017-06-16 21:18:43 +08:00
Alex Lam S.L
11e63bc335 correctly determine scope of AST_This (#2109) 
fixes #2107
 2017-06-16 14:54:46 +08:00
kzc
3fa862ce19 support shorthand property named "async" (#2108) 2017-06-16 12:18:18 +08:00
Alex Lam S.L
33405bb24b enforce inline scope restriction (#2106) 
fixes #2105
 2017-06-16 03:21:38 +08:00
alexlamsl
78cf35f89c Merge branch 'master' into harmony-v3.0.17 2017-06-15 19:01:36 +08:00
Alex Lam S.L
b85a358deb suppress inline of this (#2103) 
fixes #2101
 2017-06-15 12:14:16 +08:00
kzc
100e18305d first cut of async/await (#2098) 
- async arrow functions not yet supported


fixes #1789
 2017-06-15 06:15:48 +08:00
Alex Lam S.L
3f961bbba0 compute uses_arguments correctly in figure_out_scope() (#2099) 
fixes #2097
 2017-06-15 03:28:26 +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
fed0096556 allow expect_stdout to specify Error (#2087) 2017-06-13 04:57:26 +08:00
Alex Lam S.L
2bdc8802dd fix variable accounting in inline (#2085) 
fixes #2084
 2017-06-13 01:40:14 +08:00
Alex Lam S.L
4ad7b1dae4 fix portability of sandbox.run_code() on Node.js 0.1x (#2078) 2017-06-10 01:08:58 +08:00
Alex Lam S.L
9db0695b10 fix cascade on multi-branch evaluations (#2067) 
Partially reverts #2059 as this has better coverage and performance.

fixes #2062
 2017-06-07 19:52:01 +08:00
Alex Lam S.L
a7971f4e34 fix unused crash with top-level AST_Var (#2066) 
fixes #2063
 2017-06-07 19:12:35 +08:00
Alex Lam S.L
b9ad53d1ab fix inline handling of AST_Call.args (#2059) 2017-06-06 22:55:25 +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
27c5284d3d workaround webkit parsing error (#2056) 
apply `webkit` to jetstream tests
 2017-06-06 04:06:42 +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
kzc
82fefc5d29 fix class expression statements (#2051) 
- class expression statements require parentheses
- allow unused class expression statements to be dropped

fixes #1782
closes #1784
 2017-06-04 02:45:26 +08:00
kzc
753932b302 drop unused arrow functions (#2050) 2017-06-04 00:20:46 +08:00
Alex Lam S.L
84634da4b5 add tests for AST_SymbolAccessor (#2049) 2017-06-03 16:08:10 +08:00
Alex Lam S.L
1edbd6556f fix beautify whitespace output within AST_Destructuring (#2046) 
fixes #2044
 2017-06-02 18:50:39 +08:00
alexlamsl
ee5c03f7f1 Merge branch 'master' into harmony-v3.0.15 2017-06-01 18:26:09 +08:00
Alex Lam S.L
bac14ba881 fix non-identifier getter/setter name (#2041) 
fixes #2040
 2017-06-01 18:11:16 +08:00
Alex Lam S.L
ec095ed647 whitelist unsafe evaluate candidates (#2039) 
- all arguments may accept constant values
- return constant value
- free of side effects
- available & identical across locales and runtime environments
 2017-06-01 04:33:05 +08:00
Alex Lam S.L
17e73121fa enhance unsafe evaluate (#2037) 2017-06-01 00:56:28 +08:00
alexlamsl
c814060b4a Merge branch 'master' into harmony-v3.0.14 2017-05-31 11:42:54 +08:00
Alex Lam S.L
e9645e017f introduce unsafe_Func (#2033) 
Separate flag for #203 functionality.
 2017-05-31 03:38:00 +08:00
Alex Lam S.L
303293e4aa fix side_effects on AST_Class (#2031) 
fixes #2028
 2017-05-31 01:44:29 +08:00
Alex Lam S.L
23265ac253 mangle destructuring function parameters (#2029) 
fixes #2025
 2017-05-30 23:41:55 +08:00
Alex Lam S.L
0cc6dedccc fix block elimination (#2023) 
fixes #1664
fixes #1672
 2017-05-30 14:59:54 +08:00
kzc
ec63588496 fix compress of IIFE with destructuring args (#2022) 2017-05-30 13:17:06 +08:00
Alex Lam S.L
c2e471e3ad fix if_return on block-scoped variables (#2021) 
fixes #1317
 2017-05-29 18:08:08 +08:00
alexlamsl
520da57fdc Merge branch 'master' into harmony-v3.0.13 2017-05-29 10:58:05 +08:00
Alex Lam S.L
1aa38051fb better fix for #512 & #2010 (#2019) 
- remove duplicated functionalities
- fix similar issue with `else`
 2017-05-29 10:51:41 +08:00
Alex Lam S.L
79131cd647 extend node_version range on applicable tests (#2015) 2017-05-27 22:18:28 +08:00
alexlamsl
94d2aeee89 fix block-scoped function for ES6 
fixes #1903
 2017-05-27 19:28:07 +08:00
alexlamsl
aa835eb0f6 Merge branch 'master' into harmony-v3.0.12 2017-05-27 18:12:10 +08:00
Alex Lam S.L
7b13159cda fix hoist_funs on block-scoped function under "use strict" (#2013) 
Technically not part of ES5, but commonly used code exists in the wild.
 2017-05-27 17:44:59 +08:00
Alex Lam S.L
95094b9c22 fix if_return on AST_Defun (#2010) 
Previous fiix for #1052 perturbs declaration order of functions which leads to incorrect behaviour under "use strict".
 2017-05-27 13:41:49 +08:00
Alex Lam S.L
dc33facfcb fix dead_code on block-scoped function under "use strict" (#2006) 
Technically not part of ES5, but commonly used code exists in the wild.
 2017-05-26 16:08:51 +08:00
Alex Lam S.L
39d4d7e20a fix export related issues (#2005) 
- `mangle` non-exported names
- `unused` on `export` of `function`
- `hoist_funs` on `export`
- `export default`
  - prohibit definition statements
  - parse `AST_Defun` properly
  - drop only unused class and function names


fixes #2001
fixes #2004
 2017-05-26 13:35:40 +08:00
Alex Lam S.L
02811ce35e fix issues related to export & function (#2002) 
- `unused` function names
- confusion with function call syntax

fixes #2001
 2017-05-26 03:12:52 +08:00
alexlamsl
37e549ff4f Merge branch 'master' into harmony-v3.0.11 2017-05-23 22:29:04 +08:00
kzc
7bcb442e4c fix destructuring bugs in mangle and compress (#1992) 
- destructuring mangle
- destructuring array default values

fixes #1335
 2017-05-23 02:53:01 +08:00
kzc
a658cd84a5 fix destructuring of non string keys (#1989) 2017-05-22 16:38:03 +08:00
Alex Lam S.L
efdb65913b improve usability of global_defs in minify() (#1987) 
Use `@key` to `parse()` string value as `AST_Node`.

fixes #1986
 2017-05-22 01:38:43 +08:00
alexlamsl
a3053c537a Merge branch 'master' into harmony-v3.0.10 2017-05-21 01:36:38 +08:00
Alex Lam S.L
58fae7dc07 enhance if_return to handle return void... (#1977) 
fixes #512
 2017-05-20 15:58:46 +08:00
Alex Lam S.L
a2172e1a99 fix parsing of yield as object key (#1976) 
fixes #1974
 2017-05-20 13:11:37 +08:00
alexlamsl
02b14528fa Merge branch 'master' into harmony-v3.0.9 2017-05-19 09:51:00 +08:00
Alex Lam S.L
eae26756f1 introduce unsafe_regexp (#1970) 
fixes #1964
 2017-05-19 09:06:29 +08:00
Alex Lam S.L
3db2001633 suppress unused on block variables (#1969) 
fixes #1968
 2017-05-19 00:28:19 +08:00
alexlamsl
5f29fced0a Merge branch 'master' into harmony-v3.0.8 2017-05-18 14:54:18 +08:00
Alex Lam S.L
efcf167e5e make expect_stdout node version specific (#1963) 
... via semver string on `node_version` label.
 2017-05-18 11:28:35 +08:00
kzc
b1b918e6d6 better extends paren fix (#1962) 2017-05-18 02:36:29 +08:00
Alex Lam S.L
569c21e952 improve RegExp handling (#1959) 
- remove `options.output.unescape_regexps`
- preserve original pattern whenever possible

fixes #54
fixes #1929
 2017-05-17 20:10:50 +08:00
kzc
ebb469e4cd fix class extends expression (#1956) 2017-05-17 03:29:25 +08:00
kzc
c22d26b483 support export default of anonymous functions and classes (#1954) 2017-05-17 03:28:24 +08:00
alexlamsl
99fb3e8f0d Merge branch 'master' into harmony-v3.0.6 2017-05-16 06:48:23 +08:00
Alex Lam S.L
9464d3c20f fix parsing of property access after new line (#1944) 
Account for comments when detecting property access in `tokenizer`.

fixes #1943
 2017-05-16 05:40:49 +08:00
alexlamsl
81243c4e71 Merge branch 'master' into harmony-v3.0.5 2017-05-15 18:58:54 +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
kzc
4d8f289eb0 fix export default expression; (#1932) 2017-05-13 12:56:46 +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
alexlamsl
daf44f2b21 Merge branch 'master' into harmony-v3.0.4 2017-05-12 05:13:11 +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
Gyusun Yeom
fcd90db30d fix safari syntax error - declare twice (#1851) 
To avoid Safari bug, scope of for loop should enclose parent scope variables.


fixes #1753
 2017-05-11 16:48:43 +08:00
kzc
9d59c693c2 fix for-of loop with const iterator (#1899) 2017-05-10 11:36:03 +08:00
Alex Lam S.L
2944e3df7d fix collapse_vars on destructuring declarations (#1889) 
fixes #1886
 2017-05-09 17:44:28 +08:00
alexlamsl
b4c18f6b83 Merge branch 'master' into harmony-v3.0.0 2017-05-07 15:34:16 +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
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
kzc
ea9289771b improve literal return optimization (#1860) 2017-05-02 00:10:11 +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
kzc
73d6438773 fix \\n and \\r in template strings (#1857) 
fixes #1856
 2017-04-30 17:05:32 +08:00
kzc
5c6316a37d fix class method formatting (#1853) 
fixes #1852
 2017-04-29 18:13:25 +08:00
Alex Lam S.L
9e62628171 fix unused on for-in statements (#1843) 
Only need to avoid `var` within the initialisation block.

fixes #1841
 2017-04-24 03:14:01 +08:00
Alex Lam S.L
45ce369480 fix AST_For.init patch-up in drop_unused() (#1839) 
fixes #1838
 2017-04-23 01:51:56 +08:00
Alex Lam S.L
ca32a09032 fix label-related bugs (#1835) 
- deep cloning of `AST_LabeledStatement`
- `L:do{...}while(false)`
- empty statement with label within block

extend `test/ufuzz.js`
- generate labels for blocks & loops
- generate for-in statements
- skip suspicious option search if `minify()` errs


fixes #1833
 2017-04-22 22:15:04 +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
88e7a542cd fix unused on labeled for-loop (#1831) 
fixes #1830
 2017-04-20 04:18:38 +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
28cfb65c47 extend cascade into a.b (#1829) 
fixes #27
 2017-04-19 04:17:15 +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
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