refactor(transformer): shared VarDeclarations
#6170
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This is having a slightly negative effect on benchmarks. Which is not surprising, as access to the stack is now going through a We can remove the |
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First step towards #5049. Various transforms need to add a `var` statement at top of enclosing statement block. e.g.: ```js // Input a ??= b; ``` ```js // Output var _a; (_a = a) !== null && _a !== void 0 ? _a : (a = b); ``` Each of these transforms previously maintained it's own stack and added `var` statements individually. Share this functionality in a "common" utility transform which maintains a single stack to serve them all.
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## [0.31.0] - 2024-10-08 - 01b878e parser: [**BREAKING**] Use `BindingIdentifier` for `namespace` declaration names (#6003) (DonIsaac) - 95ca01c cfg: [**BREAKING**] Make BasicBlock::unreachable private (#6321) (DonIsaac) - 020bb80 codegen: [**BREAKING**] Change to `CodegenReturn::code` and `CodegenReturn::map` (#6310) (Boshen) - 409dffc traverse: [**BREAKING**] `generate_uid` return a `BoundIdentifier` (#6294) (overlookmotel) - 5a73a66 regular_expression: [**BREAKING**] Simplify public APIs (#6262) (leaysgur) - 32d972e parser: [**BREAKING**] Treat unambiguous files containing TS export assignments as modules (#6253) (overlookmotel) - 4f6bc79 transformer: [**BREAKING**] Remove `source_type` param from `Transformer::new` (#6251) (overlookmotel) - afc3ccb napi/transform: [**BREAKING**] Rename `TransformOptions::react` to `jsx`. (#6211) (Boshen) - 82ab689 transformer,minifier: [**BREAKING**] Move define and inject plugin from minifier to transformer (#6199) (Boshen) ### Features - fa4d505 cfg: Derive more base traits for CFG blocks (#6320) (DonIsaac) - 14275b1 cfg: Color-code edges in CFG dot diagrams (#6314) (DonIsaac) - 7566c2d data_structures: Add `as_slice` + `as_mut_slice` methods to stacks (#6216) (overlookmotel) - c3c3447 data_structures: Add `oxc_data_structures` crate; add stack (#6206) (Boshen) - e304e8c minifier: Minify exponential arithmetic operation. (#6281) (7086cmd) - f9ae70c minifier: Minify basic arithmetic calculations. (#6280) (7086cmd) - 4008afe minifier: Fold array and object constructors (#6257) (camchenry) - 115ccc9 minifier: Bitwise not in exceeded value. (#6235) (7086cmd) - ee6c850 minifier: Scaffold peephole replace known methods. (#6245) (7086cmd) - c32af57 minifier: Fold demical bitwise not for bigint. (#6233) (7086cmd) - 23b6464 minifier: Fold true / false comparison. (#6225) (7086cmd) - 585ccda minifier: Support subtraction assignment. (#6214) (7086cmd) - cca0034 minifier: Handle positive `NaN` and `Infinity`. (#6207) (7086cmd) - dac8f09 minifier: Minify unary plus negation. (#6203) (7086cmd) - 3b79e1b minifier: Evaluate bigint in fold constant (#6178) (Boshen) - abd3a9f napi/transform: Perform dce after define plugin (#6312) (Boshen) - a0ccc26 napi/transform: Add `lang` option to change source type (#6309) (Boshen) - f98e12c napi/transform: Add inject plugin (#6250) (Boshen) - 291891e napi/transform: Add `define` option (#6212) (Boshen) - 51a78d5 napi/transform: Rename all mention of React to Jsx; remove mention of `Binding` (#6198) (Boshen) - 2f888ed oxc: Add napi transform options (#6268) (Boshen) - 8729755 oxc,napi/transform: Napi/transform use oxc compiler pipeline (#6298) (Boshen) - f6e42b6 sourcemap: Add support for sourcemap debug IDs (#6221) (Tim Fish) - 9e62396 syntax_operations: Add crate `oxc_syntax_operations` (#6202) (Boshen) - cf20f3a transformer: Exponentiation transform: support private fields (#6345) (overlookmotel) ### Bug Fixes - 84b2d07 codegen: Converts line comment to block comment if it is a `PURE` comment (#6356) (Dunqing) - e9eeae0 isolated-declarations: False positive for function with a type asserted parameters (#6181) (Dunqing) - d953a6b minifier: Correct the reference link (#6283) (dalaoshu) - 37cbabb minifier: Should not handle the strict operation for bool comparison. (#6261) (7086cmd) - e29c067 minifier: Handle exceeded shifts. (#6237) (7086cmd) - 294da86 napi/transform: Fix index.d.ts (Boshen) - 9736aa0 oxc_transformer: Define `import.meta` and `import.meta.*` (#6277) (IWANABETHATGUY) - 6159560 parser: String `ImportSpecifier`s for type imports (#6352) (DonIsaac) - 1380d8b parser: Should regard comments where after `=` as leading comments of next token (#6355) (Dunqing) - 2bcd12a transformer: Exponentiation transform: fix reference flags (#6330) (overlookmotel) - 28cbfa7 transformer: Exponentiation transform: fix temp var names (#6329) (overlookmotel) - 3a4bcc7 transformer: Exponentiation transform: fix temp var names (#6318) (overlookmotel) - ccb7bdc transformer: Exponentiation transform: do not replace object when private property (#6313) (overlookmotel) - 56d50cf transformer: Exponentiation transform: do not assume `Math` is not a local var (#6302) (overlookmotel) - bd81c51 transformer: Exponentiation transform: fix duplicate symbols (#6300) (overlookmotel) - 06797b6 transformer: Logical assignment operator transform: fix reference IDs (#6289) (overlookmotel) - 4b42047 transformer: Fix memory leak in `ReplaceGlobalDefines` (#6224) (overlookmotel) - a28926f transformer: Fix inserting `require` with `front` option (#6188) (overlookmotel) - b92fe84 transformer: `NonEmptyStack::push` write value before updating cursor (#6169) (overlookmotel) ### Performance - 5db9b30 allocator: Use lower bound of size hint when creating Vecs from an iterator (#6194) (DonIsaac) - 788e444 transformer: Parse options from comments only once (#6152) (overlookmotel) - da2b2a4 transformer: Look up `SymbolId` for `require` only once (#6192) (overlookmotel) - 40bd919 transformer: Faster parsing JSX pragmas from comments (#6151) (overlookmotel) ### Documentation - eb1d0b8 transformer: Exponentiation transform: update doc comments (#6315) (overlookmotel) - c7636d7 traverse: Remove erroneous doc comment (#6328) (overlookmotel) ### Refactor - f7d1136 allocator: Remove unnecessary `Vec` impl (#6213) (overlookmotel) - 40932f7 cfg: Use IndexVec for storing basic blocks (#6323) (DonIsaac) - a1e0d30 cfg: Add type alias for Graph (#6322) (DonIsaac) - 7672793 cfg: Move block data types to separate file (#6319) (DonIsaac) - cc57541 data_structures: `NonEmptyStack::len` hint that `len` is never 0 (#6220) (overlookmotel) - 147a5d5 data_structures: Remove `is_empty` methods for non-empty stacks (#6219) (overlookmotel) - 61805fd data_structures: Add debug assertion to `SparseStack` (#6218) (overlookmotel) - dbfa0bc data_structures: Add `len` method to `StackCommon` trait (#6215) (overlookmotel) - ac5a23f minifier: Use ctx.ast.vec instead of Vec::new. (#6331) (7086cmd) - 1cee207 minifier: Some boilerplate work for PeepholeFoldConstants (#6054) (Boshen) - 5b5daec napi: Use vitest (#6307) (Boshen) - 58a8615 napi/transform: Remove context (#6306) (Boshen) - 099ff3a napi/transform: Remove "Binding" from types; fix type error (#6260) (Boshen) - 54c1c53 napi/transform: Remove a call on `TransformOptions::clone` (#6210) (Boshen) - aa0dbb6 oxc: Add `napi` feature, change napi parser to use `oxc` crate (#6265) (Boshen) - 3b53dd4 parser: Provide better error messages for `const` modifiers on class elements (#6353) (DonIsaac) - acab777 regular_expression: Misc fixes (#6234) (leaysgur) - bdd9e92 semantic: Rename vars from `ast_node_id` to `node_id` (#6304) (overlookmotel) - d110700 semantic: Dereference IDs as quickly as possible (#6303) (overlookmotel) - 03bc041 syntax: Remove some unsafe code creating IDs (#6324) (overlookmotel) - bd5fb5a transformer: Exponentiation transform: rename methods (#6344) (overlookmotel) - 4aa4e6b transformer: Exponentiation transform: do not wrap in `SequenceExpression` if not needed (#6343) (overlookmotel) - a15235a transformer: Exponentiation transform: no cloning (#6338) (overlookmotel) - 7d93b25 transformer: Exponentiation transform: split into 2 paths (#6316) (overlookmotel) - 15cc8af transformer: Exponentiation transform: break up into functions (#6301) (overlookmotel) - 7f5a94b transformer: Use `Option::get_or_insert_with` (#6299) (overlookmotel) - 0cea6e9 transformer: Exponentiation transform: reduce identifier cloning (#6297) (overlookmotel) - ac7a3ed transformer: Logical assignment transform: reduce identifier cloning (#6296) (overlookmotel) - 527f7c8 transformer: Nullish coalescing transform: no cloning identifier references (#6295) (overlookmotel) - 7b62966 transformer: Move `BoundIdentifier` into `oxc_traverse` crate (#6293) (overlookmotel) - c7fbf68 transformer: Logical assignment operator transform: no cloning identifier references (#6290) (overlookmotel) - f0a74ca transformer: Prefer `create_bound_reference_id` to `create_reference_id` (#6282) (overlookmotel) - ba3e85b transformer: Fix spelling (#6279) (overlookmotel) - bc757c8 transformer: Move functionality of common transforms into stores (#6243) (overlookmotel) - 1c31932 transformer: Rename var in `VarDeclarations` common transform (#6242) (overlookmotel) - 0400ff9 transformer: `VarDeclarations` common transform: check if at top level with `ctx.parent()` (#6231) (overlookmotel) - 235cdba transformer: Use AstBuilder instance from TraverseCtx (#6209) (overlookmotel) - a7ed29e transformer: Insert `import` statement or `require` depending on source type (#6191) (overlookmotel) - 4c63f0e transformer: Rename methods (#6190) (overlookmotel) - 900cb46 transformer: Convert `ModuleImports` into common transform (#6186) (overlookmotel) - 00e2802 transformer: Introduce `TopLevelStatements` common transform (#6185) (overlookmotel) - 70d4c56 transformer: Rename `VarDeclarationsStore` methods (#6184) (overlookmotel) - 81be545 transformer: Export `var_declarations` module from `common` module (#6183) (overlookmotel) - 02fedf5 transformer: Shorten import (#6180) (overlookmotel) - f2ac584 transformer: Use TraverseCtx's ast in ModuleImports (#6175) (Dunqing) - 21b08ba transformer: Shared `VarDeclarations` (#6170) (overlookmotel) - 0dd9a2e traverse: Add helper methods to `BoundIdentifier` (#6341) (overlookmotel) - c0e2fef traverse: Function to get var name from node (#6317) (overlookmotel) - adc5381 traverse: `TraverseAncestry` use `NonEmptyStack` (#6217) (overlookmotel) ### Testing - 964d71e minifier: Add arithmetic tests for fold constants. (#6269) (7086cmd) - fcb4651 minifier: Enable null comparison with bigint. (#6252) (7086cmd) - d4f2ee9 transformer: Tidy up transform checker (#6287) (overlookmotel) - 0f5afd7 transformer: Transform checker output symbol name for mismatches (#6286) (overlookmotel) --------- Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com> Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
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First step towards #5049.
Various transforms need to add a
varstatement at top of enclosing statement block.e.g.:
Each of these transforms previously maintained it's own stack and added
varstatements individually.Share this functionality in a "common" utility transform which maintains a single stack to serve them all.