# Changelog

## v1.4.0

Supported `polkadot-sdk` rev: `2604.2.0`

### Added

- Support for solc v0.8.36 and the "Amsterdam" EVM version.

### Fixed

- Restored the top-level `revive_version` field in `--standard-json` output and the `resolc_version` field in `--combined-json` output, both of which stopped being populated in `v0.4.0`. [#557](https://github.com/paritytech/revive/pull/557)
- ICE triggered by `--disable-solc-optimizer --newyork` where inlined loops could emit an unterminated basic block in the inlined entrypoint. [#561](https://github.com/paritytech/revive/pull/561)
- `--newyork`: dead-store elimination could drop a store whose memory expansion an intervening `msize()` observes, so `msize()` read a stale (unexpanded) value. [#565](https://github.com/paritytech/revive/pull/565)
- `--newyork`: dead-store elimination could drop a store that a later overlapping unaligned `mload` reads, returning zeroed memory instead of the stored bytes. [#563](https://github.com/paritytech/revive/pull/563)
- `--newyork`: an unaligned full-word `mload`/`mstore` overlapping a word kept native (little-endian) by the heap optimization returned byte-swapped bytes. [#562](https://github.com/paritytech/revive/pull/562)
- `--newyork`: a `calldatacopy`/`codecopy`/`returndatacopy` to a dynamic destination that could overwrite the free-memory-pointer word truncated a subsequent `mload(0x40)` to `0`. [#564](https://github.com/paritytech/revive/pull/564)
- `--newyork`: a full-width value stored to the free-memory-pointer slot (e.g. a function parameter `>= 2^64`) was narrowed to 64 bits, inserting a checked truncation that consumed all gas. [#567](https://github.com/paritytech/revive/pull/567)
- `--newyork`: an unaligned `mstore` corrupting the free-memory-pointer word let a later store through the corrupted pointer silently succeed where EVM runs out of gas. [#566](https://github.com/paritytech/revive/pull/566)
- Fixed a bytecode divergence (yet functionally equivalent) between the resolc Linux/macOS builds and the Windows build for contracts with loops indexing array elements at constant offsets from a `uint8` loop variable (e.g. `array[i]`/`array[i + 1]`), compiled with `--newyork` at `-Oz` with the solc optimizer disabled. [#570](https://github.com/paritytech/revive/pull/570)

## v1.3.0

Supported `polkadot-sdk` rev: `2604.2.0`

### Added

- The newyork IR code size optimization pipeline, selectable via the `--newyork` CLI flag or the `settings.polkavm.newyork` standard JSON input field.
  This can reduce code size by up to 50%. Considered a new and experimental feature, switched off by default. [#519](https://github.com/paritytech/revive/pull/519)

### Changed

- The latest supported `polkadot-sdk` version is now `2604.2.0`

## v1.2.0

Supported `polkadot-sdk` rev: `2603`

### Changed

- Updated `LLVM` from `21.1.8` to LLVM `22.1.4`

### Added

- Support for solc v0.8.35.

### Fixed

- A constant folding bug causing incorrect translation of a signed remainder edge case. The affected pattern (Solidity % or Yul smod):
  - SREM over the two constant operands `type(int256).min` and `-1`.
  - At least one of the two constants needs folding (i.e. not just `type(int256).min % -1`),
    and is written specifically such that solc doesn't fold but LLVM does, resulting in UB (signed-overflow).
- Fix `mulmod` returning out-of-range result for large moduli.

## v1.1.0

Supported `polkadot-sdk` rev: `2603`

### Added
- Support for solc v0.8.34.
- Inherit `STDERR` in recursive processes, allowing debug logs to be printed to the console [#485](https://github.com/paritytech/revive/pull/485)

### Fixed

- npm package: The `--bin` CLI flag was not producing bytecode because the `outputSelection` was not updated to explicitly requested it.
- Yul mode now properly exits when solc reports validation errors (e.g., invalid hex literals), matching `--standard-json` behavior. [#477](https://github.com/paritytech/revive/issues/477)
- Fixed a bytecode divergence (yet functionally equivalent) between the resolc Linux/macOS builds and the Windows build for Solidity contracts containing a value multiplied by itself (e.g. via explicit squaring or exponentiation), manifesting primarily when using optimization level `-O0`. [#500](https://github.com/paritytech/revive/pull/500)
- Recursive processes use the current executable by default [#484](https://github.com/paritytech/revive/pull/484)
- Work around some LLVM indeterminism problem [#500](https://github.com/paritytech/revive/pull/500)

### Changed

- Updated `LLVM` from `18.1.8` to LLVM `21.1.8`
- Updated `musl` to `1.2.5`
- Updated `inkwell` to `0.8.0`
- Updated `polkavm-*` to `0.31.0`
- Updated `EMSDK` to `5.0.0`
- Switched building LLVM for Windows from Visual Studio to MSVC-compatible Clang (clang-cl) and Ninja. [#497](https://github.com/paritytech/revive/pull/497)
- Append optnone and noinline for -O0 optlevel [#502](https://github.com/paritytech/revive/pull/502)

## v1.0.0

Supported `polkadot-sdk` rev: `unstable2507`

### Changed
- Removed the `revive-explorer` utility.

### Fixed
- OOB access in `calldataload` and `calldatacopy` should always produce zero values instead of consuming all gas.
- The superfluous byte swap in `linkersymbol`.
- Compiling with `--standard-json` now compiles to PolkaVM bytecode _only_ for the contracts explicitly requested in the `outputSelection`, significantly improving compilation time when none or a subset of files requests bytecode. [PR#461](https://github.com/paritytech/revive/pull/461)
- Compiling with `--standard-json` now outputs _only_ the explicitly requested output (e.g. `evm.assembly`, `evm.bytecode`, `ast`, etc.). [PR#461](https://github.com/paritytech/revive/pull/461)
```jsonc
// Example:
{
  "settings": {
    // ...
    "outputSelection": {
      "path/to/my/file1.sol": {
        // Contracts in this file will generate bytecode.
        // Only these fields of the JSON output selection will be in the `contracts` output.
        "*": ["abi", "evm.methodIdentifiers", "metadata", "evm.bytecode"],
        // Only this field of the JSON output selection will be in the `sources` output.
        "": ["ast"]
      },
      "path/to/my/file2.sol": {
        // No contracts in this file will generate bytecode.
        "*": ["abi", "evm.methodIdentifiers", "metadata"],
        // No `ast` will be in the `sources` output (only the automatically added `id`,
        // similar to solc as this is not a configurable output selection).
        "": []
      },
    }
  }
}
```

## v0.6.0

This is a development pre-release.

Supported `polkadot-sdk` rev: `unstable2507`

### Added
- The comprehensive revive compiler book documentation page: https://paritytech.github.io/revive/
- Support for solc v0.8.33.
- Support for the `clz` Yul builtin.

### Changed
- Instruct the LLVM backend and linker to `--relax` (may lead to smaller contract code size).
- Standard JSON mode: Don't forward EVM bytecode related output selections to solc.
- The supported `polkadot-sdk` release is `unstable2507`.
- The `INVALID` opcode and OOB memory accesses now consume all remaining gas.
- Emit the `call_evm` and `delegate_call_evm` syscalls for contract calls.
- The `revive-runner` can execute arbitrarily large contract blobs.
- Set the default PolkaVM stack and heap size values to 128KB.

### Fixed:
- The missing `STOP` instruction at the end of `code` blocks.
- The missing bounds check in the internal sbrk implementation.
- The call gas is no longer ignored.
- The `settings.polkavm.memoryConfig` object and its fields are now in camelCase.

## v0.5.0

This is a development pre-release.

Supported `polkadot-sdk` rev: `2509.0.0`

### Added
- Support for `SELFDESTRUCT`.

### Changed
- Emulated EVM heap memory accesses of zero length are never out of bounds.
- Switched to newer and cheaper storage syscalls (omits reads and writes of `0` values).

### Fixed
- Introduced a workaround avoiding compiler crashes caused by a bug in LLVM affecting `SDIV`.
- An off-by-one bug affecting `SDIV` overflow semantics.

## v0.4.1

This is a development pre-release.

Supported `polkadot-sdk` rev: `2503.0.1`

### Changed
- The `ast` output is no longer pruned in standard JSON mode (required for foundry).
- Support `standard_json.output_selection` to also look at per file settings.

## v0.4.0

This is a development pre-release.

Supported `polkadot-sdk` rev: `2503.0.1`

### Changed
- Remove the broken `--llvm-ir` mode.
- Remove the unused fallback for size optimization setting.
- Unlinked contract binaries are emitted as raw ELF objects.

### Added
- Line debug information per YUL builtin and for `if` statements.
- Column numbers in debug information.
- Support for the YUL optimizer details in the standard json input definition.
- The `revive-explorer` compiler utility.
- `revive-yul`: The AST visitor interface.
- The `--link` deploy time linking mode.

### Fixed
- The debug info source file matches the YUL path in `--debug-output-dir`, allowing tools to display the source line. 
- Incosistent type forwarding in JSON output (empty string vs. null object).
- The solc automatic import resolution.
- Compiler panic on missing libraries definition.

## v0.3.0

This is a development pre-release.

Supported `polkadot-sdk` rev: `2503.0.1`

### Fixed

- llvm-context: Bugfix the SAR YUL builtin translation.
- runtime-api: Add the missing `memset` builtin.
- npm package: Bugfix the exports field defined in the `package.json`.


## v0.2.0

This is a development pre-release.

Supported `polkadot-sdk` rev: `2503.0.1`

### Changed

- Removed the license printer from the `resolc` binary.
- EVM bytecode is no longer requested from solc (except in test utils) leading to less compilation work in the pipeline.

### Fixed

- solc-json-interface: Serializing of any custom key in the JSON input is only skipped if not provided.
- npm package resolution no longer fails with an 'ERR_PACKAGE_PATH_NOT_EXPORTED' error for packages defining exports fields in the `package.json`.

## v0.1.0

This is a development pre-release.

Supported `polkadot-sdk` rev: `2503.0.1`

### Added

- Add the PolkaVM heap size, stack size and debug info CLI compiler options to the standard JSON settings. This makes the standard JSON input succint for reproducible builds.

### Changed

- Supported `polkadot-sdk` version is now `2503.0.1`
- The `emsdk` version is now `4.0.9`

### Fixed

## v0.1.0-dev.16

This is a development pre-release.

Supported `polkadot-sdk` rev:`c29e72a8628835e34deb6aa7db9a78a2e4eabcee`

### Added

- Move the npm package from paritytech/js-revive, into this repo. The package `@parity/resolc` will be deployed to npm for each release.
- Support for solc v0.8.30

### Changed

- By default, heavy size optimizations are applied.

### Fixed

- @parity/resolc: The solc dependency package is constrained to the latest supported version, preventing breaking the package ever time a new solc package was released. 
- The resolc npm package no longer ignores the optimizer settings

## v0.1.0-dev.14

This is a development pre-release.

Supported `polkadot-sdk` rev:`c29e72a8628835e34deb6aa7db9a78a2e4eabcee`

### Added

- The `revive-runner` helper utility binary which helps to run contracts locally without a blockchain node.
- Allow configuration of the EVM heap memory size and stack size via CLI flags and JSON input settings.

### Changed

- The default PVM stack memory size was increased from 16kb to 32kb.

### Fixed

- Constructors avoid storing zero sized immutable data on exit.

## v0.1.0-dev.13

This is a development pre-release.

Supported `polkadot-sdk` rev:`c29e72a8628835e34deb6aa7db9a78a2e4eabcee`

### Added

- Support for solc v0.8.29
- Decouples the solc JSON-input-output type definitions from the Solidity fronted and expose them via a dedicated crate.
- `--supported-solc-versions` for `resolc` binary to return a `semver` range of supported `solc` versions.
- Support for passing LLVM command line options via the prcoess input or providing one or more `--llvm-arg='..'` resolc CLI flag. This allows more fine-grained control over the LLVM backend configuration.

### Changed

- Storage keys and values are big endian. This was a pre-mature optimization because for the contract itself it this is a no-op and thus not observable. However we should consider the storage layout as part of the contract ABI. The endianness of transient storage values are still kept as-is.
- Running `resolc` using webkit is no longer supported.

### Fixed

- A missing byte swap for the create2 salt value.

## v0.1.0-dev.12

This is a development pre-release.

Supported `polkadot-sdk` rev: `21f6f0705e53c15aa2b8a5706b208200447774a9`

### Added

- Per file output selection for `--standard-json` mode.
- The `ir` output selection option for `--standard-json` mode.

### Changed

- Improved code size: Large contracts compile to smaller code blobs when enabling aggressive size optimizations (`-Oz`).

### Fixed

## v0.1.0-dev.11

This is a development pre-release.

Supported `polkadot-sdk` rev: `274a781e8ca1a9432c7ec87593bd93214abbff50`

### Added

### Changed

### Fixed

- A bug causing incorrect loads from the emulated EVM linear memory.
- A missing integer truncate after switching to 64bit.

## v0.1.0-dev.10

This is a development pre-release.

Supported `polkadot-sdk` rev: `274a781e8ca1a9432c7ec87593bd93214abbff50`

### Added

- Support for the `coinbase` opcode.
- The resolc web JS version.

### Changed

- Missing the `--overwrite` flag emits an error instead of a warning.
- The `resolc` executable prints the help by default.
- Removed support for legacy EVM assembly (EVMLA) translation.
- integration: identify cached code blobs on source code to fix potential confusions.
- Setting base, include or allow paths in emscripten is now a hard error.
- Employ a heuristic to detect `address.transfer` and `address.send` calls.
  If detected, the re-entrant call flag is not set and 0 deposit limit is endowed.

### Fixed

- Solidity: Add the solc `--libraries` files to sources.
- A data race in tests.
- Fix `broken pipe` errors.
- llvm-builder: Allow warnings.
- solidity: Fix the custom compiler warning messages.

## v0.1.0-dev.9

This is a development pre-release.

### Added

### Changed

- Syscalls with more than 6 arguments now pack them into registers.

### Fixed

- Remove reloading of the resolc.js file (fix issue with relative path in web worker)

## v0.1.0-dev.8

This is a development pre-release.

### Added

- The `revive-llvm-builder` crate with the `revive-llvm` helper utility for streamlined management of the LLVM framework dependency.
- Initial support for running `resolc` in the browser.

### Changed

- Suported contracts runtime is polkadot-sdk git version `d62a90c8c729acd98c7e9a5cab9803b8b211ffc5`.
- The minimum supported Rust version is `1.81.0`.
- Error out early instead of invoking `solc` with invalid base or include path flags.

### Fixed

- Decouple the LLVM target dependency from the LLVM host dependency.
- Do not error out if no files and no errors were produced. This aligns resolc closer to solc.
- Fixes input normalization in the Wasm version.

## v0.1.0-dev.7

This is a development pre-release.

### Added

- Implement the `GASPRICE` opcode.
- Implement the `BASEFEE` opcode.
- Implement the `GASLIMIT` opcode.

### Changed

- The `GAS` opcode now returns the remaining `ref_time`.
- Contracts can now be supplied call data input of arbitrary size.
- Some syscalls now return the value in a register, slightly improving emitted contract code.
- Calls forward maximum weight limits instead of 0, anticipating a change in polkadot-sdk where weight limits of 0 no longer interprets as uncapped limit.

### Fixed

- A linker bug which was preventing certain contracts from linking with the PVM linker.
- JS: Fix encoding conversion from JS string (UTF-16) to UTF-8.
- The git commit hash slug is always displayed in the version string.

## v0.1.0-dev.6

This is a development pre-release.

# Added

- Implement the `BLOCKHASH` opcode.
- Implement delegate calls.
- Implement the `GASPRICE` opcode. Currently hard-coded to return `1`.
- The ELF shared object contract artifact is dumped into the debug output directory.
- Initial support for emitting debug info (opt in via the `-g` flag)

# Changed

- resolc now emits 64bit PolkaVM blobs, reducing contract code size and execution time.
- The RISC-V bit-manipulation target feature (`zbb`) is enabled.

# Fixed

- Compilation to Wasm (for usage in node and web browsers)

## v0.1.0-dev.5

This is development pre-release.

# Added

- Implement the `CODESIZE` and `EXTCODESIZE` opcodes.

# Changed

- Include the full revive version in the contract metadata.

# Fixed

## v0.1.0-dev-4

This is development pre-release.

# Added

- Support the `ORIGIN` opcode.

# Changed

- Update polkavm to `v0.14.0`.
- Enable the `a`, `fast-unaligned-access` and `xtheadcondmov` LLVM target features, decreasing the code size for some contracts.

# Fixed