Alex Lam S.L [Sat, 6 May 2017 08:15:43 +0000 (16:15 +0800)]
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
Alex Lam S.L [Tue, 2 May 2017 12:47:10 +0000 (20:47 +0800)]
rename variables for better readability (#1863)
Alex Lam S.L [Tue, 2 May 2017 11:48:12 +0000 (19:48 +0800)]
update `test/benchmark.js` resources (#1864)
Alex Lam S.L [Mon, 1 May 2017 17:42:29 +0000 (01:42 +0800)]
restore report of supported options (#1861)
fixes #1859
kzc [Mon, 1 May 2017 16:10:11 +0000 (12:10 -0400)]
improve literal return optimization (#1860)
Alex Lam S.L [Sun, 30 Apr 2017 14:52:36 +0000 (22:52 +0800)]
enforce `toplevel` on other compress options (#1855)
Respect "funcs" and "vars" properly.
fixes #1850
kzc [Tue, 25 Apr 2017 17:30:43 +0000 (13:30 -0400)]
Update ISSUE_TEMPLATE.md (#1846)
Alex Lam S.L [Sun, 23 Apr 2017 19:15:03 +0000 (03:15 +0800)]
fix fuzzer on `this` (#1842)
- forbid redeclaration of `this`
- suppress probability for `this` within nested functions
Alex Lam S.L [Sun, 23 Apr 2017 19:14:01 +0000 (03:14 +0800)]
fix `unused` on for-in statements (#1843)
Only need to avoid `var` within the initialisation block.
fixes #1841
Alex Lam S.L [Sun, 23 Apr 2017 12:05:22 +0000 (20:05 +0800)]
improve parser under "use strict" (#1836)
- `const` without value
- `delete` of expression
- redefining `arguments` or `eval`
extend `test/ufuzz.js`
- optionally generate "use strict"
- improve handling of test cases with syntax errors
- group IIFE generation
- generate bare anonymous functions
- workaround `console.log()` for `new function()`
- generate expressions with `this`
fixes #1810
kzc [Sat, 22 Apr 2017 20:28:32 +0000 (16:28 -0400)]
update README for 3.x (#1840)
Alex Lam S.L [Sat, 22 Apr 2017 17:51:56 +0000 (01:51 +0800)]
fix `AST_For.init` patch-up in `drop_unused()` (#1839)
fixes #1838
Alex Lam S.L [Sat, 22 Apr 2017 14:15:04 +0000 (22:15 +0800)]
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
Roman Dvornov [Thu, 20 Apr 2017 18:23:41 +0000 (21:23 +0300)]
Fix API reference examples (#1834)
Alex Lam S.L [Thu, 20 Apr 2017 05:06:14 +0000 (13:06 +0800)]
improve `unused` (#1832)
- extract leading value with side-effects out of `var` statement
- reduce scanning of `AST_Definitions` from 3 passes to just once
Alex Lam S.L [Wed, 19 Apr 2017 20:18:38 +0000 (04:18 +0800)]
fix `unused` on labeled for-loop (#1831)
fixes #1830
Alex Lam S.L [Tue, 18 Apr 2017 20:49:09 +0000 (04:49 +0800)]
improve `collapse_vars` on `AST_Var` (#1828)
Perform the same cascaded scanning within `var` statement as we do on array of statements.
Alex Lam S.L [Tue, 18 Apr 2017 20:27:13 +0000 (04:27 +0800)]
fix parser bugs & CLI reporting (#1827)
fixes #1825
Alex Lam S.L [Tue, 18 Apr 2017 20:17:15 +0000 (04:17 +0800)]
extend `cascade` into `a.b` (#1829)
fixes #27
Alex Lam S.L [Tue, 18 Apr 2017 13:45:34 +0000 (21:45 +0800)]
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`
Alex Lam S.L [Tue, 18 Apr 2017 05:38:42 +0000 (13:38 +0800)]
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
Alex Lam S.L [Mon, 17 Apr 2017 17:44:23 +0000 (01:44 +0800)]
fix `reduce_vars` on conditionals (#1822)
Alex Lam S.L [Mon, 17 Apr 2017 09:24:29 +0000 (17:24 +0800)]
fix `reduce_vars` on boolean binary expressions (#1819)
Side effects of `&&` and `||` have not mattered until #1814, which takes assignment expressions into account.
Alex Lam S.L [Mon, 17 Apr 2017 09:11:29 +0000 (17:11 +0800)]
compress duplicated variable definitions (#1817)
These are surprisingly common, as people reuse the same variable name within loops or switch branches.
Alex Lam S.L [Mon, 17 Apr 2017 06:03:29 +0000 (14:03 +0800)]
fix `reduce_vars` within try-block (#1818)
Possible partial execution due to exceptions.
Alex Lam S.L [Sun, 16 Apr 2017 17:36:50 +0000 (01:36 +0800)]
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
Alex Lam S.L [Sun, 16 Apr 2017 09:25:39 +0000 (17:25 +0800)]
fix variable substitution (#1816)
- let `collapse_vars` take care of value containing any symbols
- improve overhead accounting
Alex Lam S.L [Sat, 15 Apr 2017 20:04:28 +0000 (04:04 +0800)]
update README (#1813)
- mention major version bump
- remove reference to internal API
Alex Lam S.L [Sat, 15 Apr 2017 15:50:50 +0000 (23:50 +0800)]
unify CLI & API under `minify()` (#1811)
- rename `screw_ie8` to `ie8`
- rename `mangle.except` to `mangle.reserved`
- rename `mangle.properties.ignore_quoted` to `mangle.properties.keep_quoted`
- compact `sourceMap` options
- more stringent verification on input `options`
- toplevel shorthands
- `ie8`
- `keep_fnames`
- `toplevel`
- `warnings`
- support arrays and unquoted string values on CLI
- drop `fromString` from `minify()`
- `minify()` no longer handles any `fs` operations
- unify order of operations for `mangle_properties()` on CLI & API
- `bin/uglifyjs` used to `mangle_properties()` before even `Compressor`
- `minify()` used to `mangle_properties()` after `Compressor` but before `mangle_names()`
- both will now do `Compressor`, `mangle_names()` then `mangle_properties()`
- `options.parse` / `--parse` for parser options beyond `bare_returns`
- add `mangle.properties.builtins` to disable built-in reserved list
- disable with `--mangle-props builtins` on CLI
- `warnings` now off by default
- add `--warn` and `--verbose` on CLI
- drop `--enclose`
- drop `--export-all`
- drop `--reserved-file`
- use `--mangle reserved` instead
- drop `--reserve-domprops`
- enabled by default, disable with `--mangle-props domprops`
- drop `--prefix`
- use `--source-map base` instead
- drop `--lint`
- remove `bin/extract-props.js`
- limit exposure of internal APIs
- update documentations
closes #96
closes #102
closes #136
closes #166
closes #243
closes #254
closes #261
closes #311
closes #700
closes #748
closes #912
closes #1072
closes #1366
fixes #101
fixes #123
fixes #124
fixes #263
fixes #379
fixes #419
fixes #423
fixes #461
fixes #465
fixes #576
fixes #737
fixes #772
fixes #958
fixes #1036
fixes #1142
fixes #1175
fixes #1220
fixes #1223
fixes #1280
fixes #1359
fixes #1368
Alex Lam S.L [Fri, 14 Apr 2017 21:52:29 +0000 (05:52 +0800)]
drop `angular` (#1812)
Remove support for `@ngInject` as there are proper alternatives anyway.
Alex Lam S.L [Wed, 12 Apr 2017 13:56:27 +0000 (21:56 +0800)]
convert `AST_Seq` from binary tree to array (#1460)
- rename `AST_Seq` to `AST_Sequence`
- raise default sequences_limit from 200 to 800
Alex Lam S.L [Sun, 9 Apr 2017 03:36:57 +0000 (11:36 +0800)]
v2.8.22
Alex Lam S.L [Sat, 8 Apr 2017 19:18:14 +0000 (03:18 +0800)]
fix LHS cases for NaN & friends (#1804)
`Infinity = beyond` should not become `1/0 = beyond`
Alex Lam S.L [Sat, 8 Apr 2017 17:36:38 +0000 (01:36 +0800)]
enhance `test/ufuzz.js` (#1803)
- `-E` to report test cases with runtime errors
- favor returning expressions rather than empty return
- emit a newline upon fuzzer completion to not erase the iteration count
closes #1800
Alex Lam S.L [Sat, 8 Apr 2017 08:46:25 +0000 (16:46 +0800)]
fix a couple of bugs in `global_defs` (#1802)
- `optimize()` substituted expression
- compute nested property string correctly
fixes #1801
Miscellaneous
- reset optimisation flags on all node types
Alex Lam S.L [Sat, 8 Apr 2017 06:25:28 +0000 (14:25 +0800)]
fix `delete` corner cases (#1799)
- assignment
- boolean
- conditional
- sequence
Alex Lam S.L [Fri, 7 Apr 2017 10:47:30 +0000 (18:47 +0800)]
extend ufuzz generator (#1783)
- property access
- property assignment
- allow bare expression within try-block
- normalise `Error` in `console.log()`
- generate more unary expressions
- add parenthesis to enforce precedence
- adjust variable reuse/creation
- add parameters to function declaration & expression
- add return expression
- add trivial arguments to function call
Alex Lam S.L [Fri, 7 Apr 2017 09:06:01 +0000 (17:06 +0800)]
fix `pure_getters` for chained property access (#1798)
Alex Lam S.L [Fri, 7 Apr 2017 07:39:59 +0000 (15:39 +0800)]
fix corner cases with `delete` (#1796)
`delete Infinity` returns `false` where as `delete (1/0)` returns `true`
Alex Lam S.L [Fri, 7 Apr 2017 05:31:58 +0000 (13:31 +0800)]
introduce "strict" to `pure_getters` (#1795)
Alex Lam S.L [Fri, 7 Apr 2017 04:32:56 +0000 (12:32 +0800)]
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.
Alex Lam S.L [Thu, 6 Apr 2017 19:42:17 +0000 (03:42 +0800)]
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`.
Alex Lam S.L [Thu, 6 Apr 2017 16:45:51 +0000 (00:45 +0800)]
enable `inline_script` by default (#1793)
Alex Lam S.L [Thu, 6 Apr 2017 03:18:59 +0000 (11:18 +0800)]
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`
Alex Lam S.L [Wed, 5 Apr 2017 13:06:42 +0000 (21:06 +0800)]
implement delayed resolution for `reduce_vars` (#1788)
Although it would be nice to enforce `AST_Node` cloning during transformation, that ship has sailed a long time ago.
We now get the assigned value when resolving `AST_SymbolRef` instead of `reset_opt_flags()`, which has the added advantage of improved compressor efficiency.
fixes #1787
Alex Lam S.L [Tue, 4 Apr 2017 15:48:22 +0000 (23:48 +0800)]
optimise `do{...}while(false)` (#1785)
- better heuristics to avoid issues like #1532
- fix `TreeWalker.loopcontrol_target()`
- `continue` cannot refer to `switch` blocks
Alex Lam S.L [Tue, 4 Apr 2017 08:24:16 +0000 (16:24 +0800)]
remove `--mangle-props` from fuzzing (#1777)
The inherently unsafe nature makes this feature unsuitable to be tested this way.
fixes #1774
Alex Lam S.L [Mon, 3 Apr 2017 19:50:19 +0000 (03:50 +0800)]
exclude mangling of special property names (#1779)
- `null`
- `true`
- `false`
- numeric literals
Alex Lam S.L [Mon, 3 Apr 2017 15:17:47 +0000 (23:17 +0800)]
fix `mangleProperties` on identifiers (#1776)
- fix handling of "-Infinity"
- add test case for "-0"
reverts #1481
Alex Lam S.L [Mon, 3 Apr 2017 10:56:11 +0000 (18:56 +0800)]
workaround Node.js bugs (#1775)
Wrap test code in IIFE before passing to `vm`
fixes #1768
fixes #1771
Alex Lam S.L [Mon, 3 Apr 2017 04:31:05 +0000 (12:31 +0800)]
fix mangleProperties of `undefined` & `Infinity` (#1772)
`NaN` already works by the happy accident of `Number.NaN`
fixes #1770
Alex Lam S.L [Sun, 2 Apr 2017 20:00:33 +0000 (04:00 +0800)]
extend `test/ufuzz.js` (#1769)
New expressions:
- property access
- array literal
- object literal
Miscellaneous:
- reduce execution timeout
- test `toplevel` and `mangleProperties`
Alex Lam S.L [Sun, 2 Apr 2017 09:07:55 +0000 (17:07 +0800)]
v2.8.21
Alex Lam S.L [Sun, 2 Apr 2017 09:07:20 +0000 (17:07 +0800)]
fix corner case in `switch` (#1765)
Alex Lam S.L [Sun, 2 Apr 2017 08:14:09 +0000 (16:14 +0800)]
avoid confusion of `NaN` & `Infinity` with `catch` symbol of the same name (#1763)
fixes #1760
fixes #1761
Alex Lam S.L [Sun, 2 Apr 2017 06:52:25 +0000 (14:52 +0800)]
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
Alex Lam S.L [Sat, 1 Apr 2017 21:11:29 +0000 (05:11 +0800)]
speed up fuzzer code generation (#1757)
- only output one top-level function or statement block
- reduce `rng()` granularity from 2^32 to 65536
- fix overflow in `rng()`
- track `canThrow` during `typeof` creation
Alex Lam S.L [Sat, 1 Apr 2017 19:17:01 +0000 (03:17 +0800)]
minor tweaks to `test/ufuzz.js` (#1756)
- count iterations from `1` instead of `0`
- remove `unsafe` from default set of `minify()` tests
- improve usability of help
Alex Lam S.L [Sat, 1 Apr 2017 18:10:50 +0000 (02:10 +0800)]
upgrade fuzzer (#1754)
- configurable set of `minify()` options
- test and report suspects upon failure
- continue after failure if infinite iterations is specified
kzc [Sat, 1 Apr 2017 18:08:46 +0000 (14:08 -0400)]
fuzz regexp literals, more constant numbers, typeof expression (#1755)
Alex Lam S.L [Sat, 1 Apr 2017 09:19:57 +0000 (17:19 +0800)]
fix switch branch elimination (#1752)
Merge unreachable case body with previous fallthrough case
fixes #1750
Alex Lam S.L [Sat, 1 Apr 2017 09:09:52 +0000 (17:09 +0800)]
minor tweaks to fuzzer (#1751)
- remove `let` as variable name
- employ `crypto.randomBytes()`
Alex Lam S.L [Fri, 31 Mar 2017 21:47:11 +0000 (05:47 +0800)]
implement `test/sandbox.js` (#1749)
- `test/run-tests.js` and `test/ufuzz.js` now shares the same `run_code()` and `same_stdout()`
- re-enable fuzzer to generate top-level `NaN`, `Infinity` & `undefined`
- attempt to show beautified output only when `run_code()` output is preserved
Alex Lam S.L [Fri, 31 Mar 2017 19:02:14 +0000 (03:02 +0800)]
improve compression of undefined, NaN & Infinitiy (#1748)
- migrate transformation logic from `OutputStream` to `Compressor`
- always turn `undefined` into `void 0` (unless `unsafe`)
- always keep `NaN` except when avoiding local variable redefinition
- introduce `keep_infinity` to suppress `1/0` transform, except when avoiding local variable redefinition
supersedes #1723
fixes #1730
Alex Lam S.L [Fri, 31 Mar 2017 10:47:44 +0000 (18:47 +0800)]
combine rules for binary boolean operations (#1744)
Peter van der Zee [Fri, 31 Mar 2017 09:23:50 +0000 (11:23 +0200)]
Massive extension of the fuzzer (#1697)
Fix bug where a `throw` was generated without expression
Reenable try/catch/finally and fix them up
Skip serialization errors
Allow function decl in other funcs but not in blocks etc
Rename function to be more appropriate
Fix global functions not getting certain names
Make the canaries more likely to appear as expressions
Add a silly rounding edge case
Add a new canary, `c`, which should only ever be incremented
Refactoring
Fix (another) iife not actually being invoked
When a statement hits recursion max return an expression instead of `;`
When a expression hits recursion max also inc `c`
Generate global code as well as function code
Also fixes some argument juggling related bugs.
No longer reduces the recursion max when generating sub functions.
Generates a function arg.
Add used names to var name pool while in that scope
This is a little wonky, possibly a hack, but since it's synchronous code I think it's alright to do this. The alternative is to slice the varnames array and juggle them through almost all the generator functions and there are various reasons why this patch is a better alternative.
Minify generated code, not beautified code. Prevents beautifier bias.
Prevent unnecessary duplication
Remove serialization protection because I think it got handled elsewhere
Abstract toplevel code generation
Add example line of running test case
Add poor man options parser, and some options
Reindent to 4 spaces
Lower chance of `default` generation
Comment example of testing a case and output improvement
Enable `default` clause appearing at any clause index
Removing some training wheels; dont add parens where we dont absolutely need them
Support `-s1` and `-s2` to force specific statements being generated at that recursion level
Add round number to output when failing. For stats and fun and profit.
Solidify statement depth counting. The argument juggling is real.
Renamed option to something long. -scf was ugly and probably confusing.
Fix missing arguments causing `canThrow` to be truthy, generating crashing code
Generate more binary nested expressions
Add black and white list cli options for statement generation
Allows you to explicitly require or forbid certain statements from/to being made.
```
node test/ufuzz.js --without-stmt switch,try -t 5 -r 5 -V
```
```
node test/ufuzz.js --only-stmt ifelse,expr -t 5 -r 5 -V
```
Similar granularity for expression may be added later.
There can be no comma between names; it just does a split on that arg.
Trim down the binary expression generator
Prevent scoping issues in nodejs by preventing certain names in global space
Oh this list was incomplete?
Allow bin-expr to generate assignments too. More vigilant with storing and reusing vars.
Add more global builtin names
Update wrapper code
Also patch Function valueOf
Alex Lam S.L [Fri, 31 Mar 2017 08:41:04 +0000 (16:41 +0800)]
sort options in alphabetical order (#1743)
They started off as functional groups I guess, but given the sheer number of options this is becoming too difficult to read.
Alex Lam S.L [Fri, 31 Mar 2017 07:27:40 +0000 (15:27 +0800)]
v2.8.20
Alex Lam S.L [Fri, 31 Mar 2017 07:26:57 +0000 (15:26 +0800)]
fix missing preamble when shebang is absent (#1742)
Alex Lam S.L [Fri, 31 Mar 2017 04:26:10 +0000 (12:26 +0800)]
v2.8.19
Alex Lam S.L [Thu, 30 Mar 2017 18:57:47 +0000 (02:57 +0800)]
fix catch symbol mangling (#1734)
Only need to look up the immediate non-block/catch scope for the same-name special case.
fixes #1733
Alex Lam S.L [Thu, 30 Mar 2017 08:09:00 +0000 (16:09 +0800)]
remove paranthesis for `-(x*y)` (#1732)
Alex Lam S.L [Thu, 30 Mar 2017 04:16:58 +0000 (12:16 +0800)]
optimize try-catch-finally (#1731)
- eliminate empty blocks
- flatten out if try-block does not throw
Alex Lam S.L [Wed, 29 Mar 2017 16:13:46 +0000 (00:13 +0800)]
improve tests from #1726 (#1729)
Alex Lam S.L [Wed, 29 Mar 2017 15:27:35 +0000 (23:27 +0800)]
speed up IIFE elimination (#1728)
- `side_effects` will clean up inner statements, so checking for an empty function body should suffice
- drop side effects when dropping `return` from statement
Alex Lam S.L [Wed, 29 Mar 2017 14:08:26 +0000 (22:08 +0800)]
speed up `equivalent_to()` and `AST_Switch` (#1727)
Alex Lam S.L [Wed, 29 Mar 2017 12:53:03 +0000 (20:53 +0800)]
fix missing parentheses around NaN/Infinity shorthands (#1726)
fixes #1724
fixes #1725
Alex Lam S.L [Wed, 29 Mar 2017 10:31:55 +0000 (18:31 +0800)]
output optimal representations of NaN & Infinity (#1723)
- move these optimisations out from `Compressor` to `OutputStream`
- fixes behaviour inconsistency when running uglified code from global or module levels due to redefinition
Alex Lam S.L [Tue, 28 Mar 2017 20:40:05 +0000 (04:40 +0800)]
improve beautified output of switch blocks (#1721)
Alex Lam S.L [Tue, 28 Mar 2017 19:13:30 +0000 (03:13 +0800)]
v2.8.18
Alex Lam S.L [Tue, 28 Mar 2017 17:27:24 +0000 (01:27 +0800)]
remove UGLIFY_DEBUG (#1720)
fixes #1719
Alex Lam S.L [Tue, 28 Mar 2017 17:00:21 +0000 (01:00 +0800)]
fix corner case in `unused` (#1718)
When fixing catch-related issue in #1715, it tries to optimise for duplicate definitions but did not take anonymous functions into account.
Remove such optimisation for now and we can cover this as a more general rule later.
Alex Lam S.L [Tue, 28 Mar 2017 13:49:04 +0000 (21:49 +0800)]
v2.8.17
Alex Lam S.L [Tue, 28 Mar 2017 13:25:49 +0000 (21:25 +0800)]
fix `unused` on var of the same name within catch (#1716)
fixes #1715
Alex Lam S.L [Tue, 28 Mar 2017 09:08:16 +0000 (17:08 +0800)]
fix `is_number()` on `+=` (#1714)
fixes #1710
Alex Lam S.L [Tue, 28 Mar 2017 09:02:20 +0000 (17:02 +0800)]
drop anonymous function name when overshadowed by other declarations (#1712)
fixes #1709
Alex Lam S.L [Tue, 28 Mar 2017 08:42:39 +0000 (16:42 +0800)]
handle var within catch of the same name (#1711)
The following code prints `1`:
var a = 1;
!function(){
a = 4;
try{
throw 2;
} catch (a) {
var a = 3;
}
}();
console.log(a);
fixes #1708
Alex Lam S.L [Mon, 27 Mar 2017 19:59:13 +0000 (03:59 +0800)]
fix tail trimming of switch blocks (#1707)
now guarded under `dead_code`
fixes #1705
Alex Lam S.L [Mon, 27 Mar 2017 19:26:35 +0000 (03:26 +0800)]
fix mangle for variable declared within catch block (#1706)
fixes #1704
Alex Lam S.L [Mon, 27 Mar 2017 13:49:08 +0000 (21:49 +0800)]
ufuzz: workaround for Function.toString() v2 (#1700)
Alex Lam S.L [Mon, 27 Mar 2017 10:09:35 +0000 (18:09 +0800)]
`has_side_effects()` should take `AST_Switch.expression` into account (#1699)
fixes #1698
Alex Lam S.L [Sun, 26 Mar 2017 20:37:42 +0000 (04:37 +0800)]
fix typeof side effects (#1696)
`statement_to_expression()` drops `typeof` even if it operates on undeclared variables.
Since we now have `drop_side_effect_free()`, replace and remove this deprecated functionality.
Alex Lam S.L [Sun, 26 Mar 2017 18:32:46 +0000 (02:32 +0800)]
preserve side effects in switch expression (#1694)
fixes #1690
Alex Lam S.L [Sun, 26 Mar 2017 17:58:21 +0000 (01:58 +0800)]
fix `cascade` on anonymous function reference (#1693)
Unlike normal variables and even function definitions, these cannot be reassigned, even though assignment expressions would "leak" the assigned value as normal.
Alex Lam S.L [Sun, 26 Mar 2017 17:30:21 +0000 (01:30 +0800)]
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.
Alex Lam S.L [Sun, 26 Mar 2017 11:14:30 +0000 (19:14 +0800)]
fix `delete` related issues in `collapse_vars` and `reduce_vars` (#1689)
Alex Lam S.L [Sun, 26 Mar 2017 10:18:44 +0000 (18:18 +0800)]
ufuzz: workaround function name and toString() (#1688)
fixes #1686
Alex Lam S.L [Sun, 26 Mar 2017 10:08:44 +0000 (18:08 +0800)]
fix `cascade` on `delete` operator (#1687)
Conditions including strict mode would make `delete` return `true` or `false`, and are too complex to be evaluated by the compressor.
Suppress assignment folding into said operator.
fixes #1685
Alex Lam S.L [Sun, 26 Mar 2017 08:52:38 +0000 (16:52 +0800)]
fallthrough should not execute case expression (#1683)
- de-duplicate trailing cases only, avoid all potential side-effects
- enable switch statement fuzzing
fixes #1680
kzc [Sun, 26 Mar 2017 08:36:33 +0000 (04:36 -0400)]
optimize conditional when condition symbol matches consequent (#1684)