Jooris Hadeler
c2fc83b74b
Implements a full LLVM IR text emitter and three-step toolchain:
1. Emit LLVM IR (.ll) via alloca-based codegen (mem2reg-friendly)
2. `opt -O2` → optimised IR (override with FLUXC_OPT)
3. `llc -filetype=obj` → object file (override with FLUXC_LLC)
4. `cc` → link into executable (override with FLUXC_CC)
(step 4 skipped in -c mode)
Emitter supports all Flux types, operators, control flow (if/else,
while, loop, break, continue), structs, arrays, pointer operations,
function calls, string literals, and integer literal type inference
via UnboundInt → concrete-type coercion.
Also adds -o <file> CLI flag, exposes CheckResult from the checker
(sigma + phi tables reused by codegen), and updates main.rs to run
the full parse → check → codegen pipeline.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>