e356524b0a
feat(joinir): Phase 246-EX Part 1 - FromHost carrier infrastructure
...
Extends Phase 247-EX dual-value architecture for _atoi NumberAccumulation
support. Implements FromHost carrier handling throughout JoinIR pipeline.
## Problem Analysis
_atoi requires `result = result * 10 + digit_pos` where:
- digit_pos is promoted to dual carriers: is_digit_pos (bool) + digit_value (int)
- digit_value is used in NumberAccumulation but NOT updated itself
- Existing infrastructure filtered out carriers without updates
## Implementation
### 1. Carrier Filtering (pattern2_with_break.rs:507-514)
**Added FromHost retention**:
```rust
carrier_updates.contains_key(&carrier.name)
|| carrier.role == CarrierRole::ConditionOnly
|| carrier.init == CarrierInit::FromHost // Phase 247-EX
```
**Effect**: Keeps digit_value carrier despite no update expression
### 2. Carrier Update Passthrough (loop_with_break_minimal.rs:411-426)
**Added FromHost passthrough**:
- FromHost carriers without updates pass through from env
- Similar to Phase 227 ConditionOnly handling
- Logged as `[loop/carrier_update] Phase 247-EX: FromHost carrier passthrough`
### 3. Exit Bindings Collection (meta_collector.rs:156-172)
**Added FromHost exit_bindings inclusion**:
```rust
Some((CarrierRole::LoopState, CarrierInit::FromHost)) => {
// Include in exit_bindings for latch incoming
// Not for exit PHI or variable_map
}
```
**Effect**: digit_value gets latch incoming for header PHI
## Test Results
- **Before**: 931 tests PASS
- **After**: 931 tests PASS (0 regressions)
## Verification
**Phase 247-EX UpdateEnv working**:
```
[update_env/phase247ex] Resolved promoted 'digit_pos' → 'digit_value' (integer carrier): ValueId(111)
```
**NumberAccumulation MIR generated**:
```
%39 = %14 Mul %38 ← result * 10
%40 = %39 Add %9 ← tmp + digit_value
```
## Status
- ✅ Pattern2 classification
- ✅ NumberAccumulation detection
- ✅ dual-value carrier resolution
- ✅ FromHost carrier handling
- ⚠️ RC:0 issue (runtime value problem, Part 2)
## Related
- Phase 247-EX: DigitPos dual-value architecture (commit 8900a3cc🤖 Generated with [Claude Code](https://claude.com/claude-code )
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com >
2025-12-11 15:28:36 +09:00
