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feat: replace Cranelift JIT with C backend

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Remove Cranelift JIT compiler and expose the existing C backend as the
compilation target. Generated C code can be compiled with GCC/Clang.

Changes:
- Remove cranelift-* dependencies from Cargo.toml
- Delete src/compiler.rs (565 lines of Cranelift code)
- Add compile_to_c() function with -o and --run flags
- Fix C backend name mangling (main -> main_lux) to avoid conflicts
- Update CLI help text and documentation

Usage:
  lux compile <file.lux>           # Output C to stdout
  lux compile <file.lux> -o out.c  # Write to file
  lux compile <file.lux> --run     # Compile and execute

C backend supports: functions, basic types, operators, if/then/else,
records, enums, Console.print. Future work: closures, lists, patterns.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Brandon Lucas
2026-02-14 03:37:35 -05:00
parent 8c7354131e
commit 67437b8273
8 changed files with 132 additions and 999 deletions
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9
docs/ROADMAP.md
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@@ -67,10 +67,10 @@
| Task | Priority | Effort | Status |
|------|----------|--------|--------|
| Elm-quality error messages | P1 | 2 weeks | ⚠️ Partial (context shown, suggestions missing) |
| Full JS compilation | P2 | 4 weeks | ⚠️ JIT for numeric code only |
| Full JS compilation | P2 | 4 weeks | ❌ Missing |
| Hot reload / watch mode | P2 | — | ✅ Complete |
| Debugger improvements | P3 | 2 weeks | ✅ Basic |
| JIT CLI integration | P1 | — | ✅ Complete (`lux compile`) |
| C backend CLI integration | P1 | — | ✅ Complete (`lux compile`) |
### Success Criteria for Use Case 1
- [ ] Can build a REST API with database access
@@ -220,7 +220,8 @@
| Task | Priority | Effort | Status |
|------|----------|--------|--------|
| Extend JIT (strings, lists) | P1 | 2 weeks | ❌ Missing |
| C backend (basic) | P1 | — | ✅ Complete (functions, Console.print) |
| Extend C backend (closures, lists) | P1 | 2 weeks | ❌ Missing |
| JS backend | P2 | 4 weeks | ❌ Missing |
| WASM backend | P3 | 4 weeks | ❌ Missing |
@@ -296,7 +297,7 @@
- ✅ JSON parsing/serialization (parse, stringify, get, object, array)
**Tooling:**
- ✅ JIT compiler (~160x speedup, CLI: `lux compile`)
- ✅ C backend (functions, Console.print, CLI: `lux compile`)
- ✅ REPL with history
- ✅ Basic LSP server
- ✅ Formatter