Make LLVM the sole production backend - #574
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Sep 29, 2026
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- Remove C emission, debugging options, and automatic backend fallback.
- Complete LLVM lowering and native bootstrap coverage across supported targets.
- Link executables and libraries with precompiled C runtime packs, including iOS and Android.
- Remove C emission, debugging options, and automatic backend fallback. - Complete LLVM lowering and native bootstrap coverage across supported targets. - Link executables and libraries with precompiled C runtime packs, including iOS and Android.
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- Preserve promise presence checks and local class capture environments. - Restore target diagnostics and update LLVM bootstrap fixtures and baselines. - Give native self-hosting checks enough heap and worker response time.
- Run runtime-pack and native-toolchain compiler passes in child processes. - Preserve static coverage and native behavior assertions without relying on an unsupported RPC timeout setting.
- Lower logical chains iteratively while preserving operand values and short-circuit evaluation. - Cover long logical chains through the sanitized native frontend and differential corpus. - Compare full bootstrap IR and LLVM in a child process with sufficient heap.
- Cover release and development compilation once per combined differential lane. - Cancel superseded pull request runs to free runner capacity for the latest commit.
- Build optimized compiler executables and reuse retained LLVM during self-hosting checks. - Isolate the frontend bootstrap and report compilation phase timings. - Preserve module stream aliases across JavaScript function boundaries.
- End the TypeScript session and release intermediate compiler data before invoking LLVM. - Preserve retained LLVM and existing outputs across native code generation failures.
- Include source locations and runtime diagnostics in the typed frontend fixture.
- Share one feature traversal across LLVM emission and runtime selection. - Preserve feature detection through native differential coverage and mutable IR snapshots. - Keep frontend integration workers responsive during compilation and execution.
- Skip the aggregate gate on cancelled runs while retaining failure reporting for completed lanes.
- Avoid repeated dynamic copies when checking call boundaries and island coverage. - Run full compiler bootstrap checks independently of corpus shards.
- Index large union conversions and avoid repeated type narrowing during equality checks. - Release frontend state before native optimization and verify large conversions in native builds.
- Give LLVM optimization and native compiler rebuilds more memory on standard CI runners. - Preserve plain and sanitized bootstrap coverage alongside Darwin platform checks.
- Share identical exceptional scope cleanup to reduce generated LLVM. - Preserve typed function bodies without dynamic class dispatch sites. - Resolve the Linux linker before testing the standalone compiler without PATH.
- Reuse frontend traversal results and avoid unnecessary conversion work. - Preserve recursive union variants and optional logical values. - Keep sanitized bootstrap comparisons precise and exercise inferred record conversions in native builds.
- Borrow immediate field receivers and share equivalent union field layouts to reduce generated code and reference counting. - Preserve literal NaN output and cover receiver lifetimes through native compiler bootstraps. - Reuse prepared Sandbox snapshots for faster full validation and record missing TypeScript parity baselines.
- Clear stale incremental build metadata after replacing a snapshot's source tree so CLI tests load the current compiler.
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