a3df5ecc7a
Implements role-based separation of LoopBodyLocal variables to prevent inappropriate Trim promotion for body-only local variables. ## Changes ### Task 183-1: Design Documentation - Created `phase183-loopbodylocal-role-separation.md` with role taxonomy: - Condition LoopBodyLocal: Used in loop conditions → Trim promotion target - Body-only LoopBodyLocal: Only in body → No promotion needed - Documented architectural approach and implementation strategy ### Task 183-2: Implementation - Added `TrimLoopLowerer::is_var_used_in_condition()` helper - Recursively checks if variable appears in condition AST - Handles BinaryOp, UnaryOp, MethodCall node types - Updated `try_lower_trim_like_loop()` to filter condition LoopBodyLocal - Only processes LoopBodyLocal that appear in break conditions - Skips body-only LoopBodyLocal (returns Ok(None) early) - Added 5 unit tests for variable detection logic ### Task 183-3: Test Files - Created `phase183_body_only_loopbodylocal.hako` - Demonstrates body-only LoopBodyLocal (`temp`) not triggering Trim - Verified trace output: "No LoopBodyLocal detected, skipping Trim lowering" - Created additional test files (phase183_p1_match_literal, phase183_p2_atoi, phase183_p2_parse_number) ### Task 183-4: Documentation Updates - Updated `joinir-architecture-overview.md` with Phase 183 results - Updated `CURRENT_TASK.md` with Phase 183 completion status ## Results ✅ LoopBodyLocal role separation complete ✅ Body-only LoopBodyLocal skips Trim promotion ✅ 5 unit tests passing ✅ Trace verification successful ## Next Steps (Phase 184+) - Body-local variable MIR lowering support - String concatenation filter relaxation - Full _parse_number/_atoi implementation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
44 lines
1.2 KiB
Plaintext
44 lines
1.2 KiB
Plaintext
// Phase 183-3: Pattern2 Break test (_parse_number pattern)
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// Tests: Integer loop with break, body-only LoopBodyLocal
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// This test demonstrates that body-only locals don't trigger Trim promotion
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static box Main {
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main(args) {
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// Simulate _parse_number: parse digits until non-digit
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// For simplicity, we use integer accumulation instead of string concat
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local result = 0
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local p = 0
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local limit = 5
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loop(p < limit) {
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// Body-only LoopBodyLocal: digit_pos computation
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// In real _parse_number: local digit_pos = "0123456789".indexOf(ch)
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// Here we simulate: valid digits for p=0,1,2 (values 4,2,7)
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local digit_pos = -1
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if p == 0 { digit_pos = 4 } // '4'
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if p == 1 { digit_pos = 2 } // '2'
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if p == 2 { digit_pos = 7 } // '7'
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// p >= 3: digit_pos stays -1 (non-digit)
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// Break on non-digit
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if digit_pos < 0 {
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break
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}
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result = result * 10 + digit_pos
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p = p + 1
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}
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// Expected: result = 427 (from digits 4, 2, 7)
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if result == 427 {
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if p == 3 {
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print("PASS: P2 Break with body-only LoopBodyLocal works")
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return 0
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}
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}
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print("FAIL: result or p incorrect")
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return 1
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}
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}
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