guix - Wojtek's customized Guix

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(#1763) fixes #1760 fixes #1761 2017-04-02fix corner cases in switch and undefined (#1762)Alex Lam S.L - 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 2017-04-01fix switch branch elimination (#1752)Alex Lam S.L Merge unreachable case body with previous fallthrough case fixes #1750 2017-04-01improve compression of undefined, NaN & Infinitiy (#1748)Alex Lam S.L - 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 2017-03-31combine rules for binary boolean operations (#1744)Alex Lam S.L 2017-03-31sort options in alphabetical order (#1743)Alex Lam S.L They started off as functional groups I guess, but given the sheer number of options this is becoming too difficult to read. 2017-03-31fix missing preamble when shebang is absent (#1742)Alex Lam S.L 2017-03-31fix catch symbol mangling (#1734)Alex Lam S.L Only need to look up the immediate non-block/catch scope for the same-name special case. fixes #1733 2017-03-30remove paranthesis for `-(x*y)` (#1732)Alex Lam S.L 2017-03-30optimize try-catch-finally (#1731)Alex Lam S.L - eliminate empty blocks - flatten out if try-block does not throw 2017-03-29speed up IIFE elimination (#1728)Alex Lam S.L - `side_effects` will clean up inner statements, so checking for an empty function body should suffice - drop side effects when dropping `return` from statement 2017-03-29speed up `equivalent_to()` and `AST_Switch` (#1727)Alex Lam S.L 2017-03-29fix missing parentheses around NaN/Infinity shorthands (#1726)Alex Lam S.L fixes #1724 fixes #1725 2017-03-29output optimal representations of NaN & Infinity (#1723)Alex Lam S.L - move these optimisations out from `Compressor` to `OutputStream` - fixes behaviour inconsistency when running uglified code from global or module levels due to redefinition 2017-03-29improve beautified output of switch blocks (#1721)Alex Lam S.L 2017-03-29fix corner case in `unused` (#1718)Alex Lam S.L 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. 2017-03-28fix `unused` on var of the same name within catch (#1716)Alex Lam S.L fixes #1715 2017-03-28fix `is_number()` on `+=` (#1714)Alex Lam S.L fixes #1710 2017-03-28drop anonymous function name when overshadowed by other declarations (#1712)Alex Lam S.L fixes #1709 2017-03-28handle var within catch of the same name (#1711)Alex Lam S.L The following code prints `1`: var a = 1; !function(){ a = 4; try{ throw 2; } catch (a) { var a = 3; } }(); console.log(a); fixes #1708 2017-03-28fix tail trimming of switch blocks (#1707)Alex Lam S.L now guarded under `dead_code` fixes #1705 2017-03-28fix mangle for variable declared within catch block (#1706)Alex Lam S.L fixes #1704 2017-03-27`has_side_effects()` should take `AST_Switch.expression` into account (#1699)Alex Lam S.L fixes #1698 2017-03-27fix typeof side effects (#1696)Alex Lam S.L `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. 2017-03-27preserve side effects in switch expression (#1694)Alex Lam S.L fixes #1690 2017-03-27fix `cascade` on anonymous function reference (#1693)Alex Lam S.L Unlike normal variables and even function definitions, these cannot be reassigned, even though assignment expressions would "leak" the assigned value as normal. 2017-03-27handle overlapped variable definitions (#1691)Alex Lam S.L 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. 2017-03-26fix `delete` related issues in `collapse_vars` and `reduce_vars` (#1689)Alex Lam S.L 2017-03-26fix `cascade` on `delete` operator (#1687)Alex Lam S.L 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 2017-03-26fallthrough should not execute case expression (#1683)Alex Lam S.L - de-duplicate trailing cases only, avoid all potential side-effects - enable switch statement fuzzing fixes #1680 2017-03-26optimize conditional when condition symbol matches consequent (#1684)kzc 2017-03-26suppress switch branch de-duplication upon side effects (#1682)Alex Lam S.L fixes #1679 2017-03-26fix side-effects detection on switch statements (#1678)Alex Lam S.L extension of #1675 2017-03-26improve switch optimisations (#1677)Alex Lam S.L - correctly determine reachability of (default) branches - gracefully handle multiple default branches - optimise branches with duplicate bodies fixes #376 fixes #441 fixes #1674 2017-03-25fix `has_side_effects()` (#1675)Alex Lam S.L `AST_Try` is an `AST_Block`, so besides try block we also need to inspect catch and finally blocks for possible side effects. Also extend this functionality to handle `AST_If` and `AST_LabeledStatement` while we are at it. fixes #1673 2017-03-25fix `reduce_vars` on `AST_Switch` (#1671)Alex Lam S.L Take conditional nature of switch branches into account. fixes #1670 2017-03-25fix typeof side-effects (#1669)Alex Lam S.L `has_side_effects()` does not take `typeof`'s magical power of not tripping over undeclared variable into account. fixes #1668 2017-03-25fix `dead_code` on `AST_Switch` (#1667)Alex Lam S.L Need to call `extract_declarations_from_unreachable_code()`. fixes #1663 2017-03-25fix invalid `AST_For.init` (#1657)Alex Lam S.L Turns out the only place in `Compressor` which can generate invalid `AST_For.init` is within `drop_unused()`, so focus the fix-up efforts. supercedes #1652 fixes #1656 2017-03-24fix cascade of `evaluate` optimisation (#1654)Alex Lam S.L Operator has changed, so break out from rest of the rules. fixes #1649 2017-03-24fix corner case in `AST_For.init` (#1652)Alex Lam S.L Enforce `null` as value for empty initialisation blocks. fixes #1648 2017-03-24fix assignment extraction from conditional (#1651)Alex Lam S.L fixes #1645 fixes #1646 2017-03-24fix assignment substitution in sequences (#1643)Alex Lam S.L take side effects of binary boolean operations into account fixes #1639 2017-03-24improve error marker placement (#1644)Alex Lam S.L For AST_UnaryPrefix, points to the operator rather than end of expression. 2017-03-24fix regression: CLI options with hyphens like -b ascii-only (#1640)kzc fixes #1637 2017-03-24improve collapsible value detection (#1638)Alex Lam S.L - #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 2017-03-23account for cross-scope modifications in `collapse_vars` (#1634)Alex Lam S.L mostly done by @kzc fixes #1631


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