Pipeline:
- main.rs now runs IR lowering and optimization before codegen
- IR is built and optimized but output still uses AST-based codegen
(IR-based codegen is a future improvement)
Coin Cavern example (examples/coin_cavern.ne):
- 3-state game: Title → Playing → GameOver
- Functions (clamp_x), constants, gravity physics, coin collection
- Demonstrates most M2 language features
Integration tests (14 total, 7 new):
- program_with_functions: functions with params and return values
- program_with_while_loop: while loops compile correctly
- program_with_fast_slow_vars: placement hints accepted
- program_with_multi_state_transitions: 3-state cycle
- coin_cavern_compiles: full Coin Cavern example
- ir_pipeline_produces_ir: validates IR lowering + optimizer
- error_test_recursion_detected: E0402 for recursive functions
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
Analyzer extensions:
- Call graph construction from function bodies and state handlers
- DFS-based recursion detection (direct and mutual) with E0402 errors
- Max call depth computation per entry point with E0401 enforcement
- Function declarations registered as symbols (E0503 for undefined calls)
- Collects calls from all statement/expression types recursively
Optimizer (new module):
- Constant folding: evaluate known-constant arithmetic at compile time
- Dead code elimination: remove ops with unused destination temps
- Both operate per-basic-block in a single pass
171 tests total (22 new: 6 analyzer + 11 IR lowering + 5 optimizer)
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
- CI: new "Build Examples" job compiles all .ne files and validates
the output ROMs have correct iNES headers
- Examples: add notes explaining that sprite names (Smiley, Ball) are
parsed but not yet resolved — all draws use the built-in CHR tile 0.
Custom sprite declarations come in M3.
- Codegen: explicit `let _ = &draw.sprite_name` to document the
intentional skip, with comment about M2/M3 scope
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
Two example .ne programs with compiled .nes ROMs:
- hello_sprite: d-pad controlled sprite movement
- bouncing_ball: auto-bouncing sprite with edge detection
Includes README with build instructions and emulator setup.
https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
