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refactor(joinir): Phase 229 - Remove redundant ConditionAlias

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Replace static alias mapping with dynamic condition variable resolution using:
- promoted_loopbodylocals as source of truth
- Naming conventions: is_<var> or is_<var>_match
- Pattern-aware inference during lowering

Benefits:
- Simpler data structure (6 fields → 5)
- Single source of truth
- Self-documenting with explicit naming conventions
- Fewer maintenance points

Net: -25 lines (60 additions, 85 deletions)
Tests: 877/884 PASS (no regressions)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
nyash-codex
2025-12-10 21:53:27 +09:00
parent 717a50ceeb
commit 38e810d071
10 changed files with 1329 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
src/mir/builder/control_flow/joinir/patterns/pattern2_with_break.rs
View File

@ -348,43 +348,42 @@ impl MirBuilder {
carrier.name, carrier_join_id);
}
// Phase 224-D: Save carriers with join_ids BEFORE filtering
let carriers_with_join_ids = carrier_info.carriers.clone();
// Phase 229: Dynamic condition variable resolution for promoted variables
// Instead of using condition_aliases, we dynamically resolve promoted variables
// using promoted_loopbodylocals + naming convention
for promoted_var in &carrier_info.promoted_loopbodylocals {
// Try both naming conventions:
// 1. DigitPos pattern: "var" → "is_var"
// 2. Trim pattern: "var" → "is_var_match"
// Phase 224-D: Add condition aliases to ConditionEnv
// This allows promoted variables to be referenced by their original names in conditions
for alias in &carrier_info.condition_aliases {
// Check if the carrier_name matches the loop_var_name (promoted as main carrier)
if alias.carrier_name == carrier_info.loop_var_name {
// Use loop variable's join_id from env
if let Some(join_id) = env.get(&carrier_info.loop_var_name) {
env.insert(alias.old_name.clone(), join_id);
eprintln!(
"[pattern2/phase224d] Added condition alias '{}' → loop_var '{}' (join_id={:?})",
alias.old_name, carrier_info.loop_var_name, join_id
);
}
} else {
// Find the carrier's join_id in the carriers list (BEFORE filtering, with join_ids)
if let Some(carrier) = carriers_with_join_ids.iter().find(|c| c.name == alias.carrier_name) {
if let Some(join_id) = carrier.join_id {
// Add alias mapping: old_name → carrier's join_id
env.insert(alias.old_name.clone(), join_id);
let candidate_names = vec![
format!("is_{}", promoted_var), // DigitPos pattern
format!("is_{}_match", promoted_var), // Trim pattern
];
for carrier_name in candidate_names {
// Check if it's the loop variable
if carrier_name == carrier_info.loop_var_name {
if let Some(join_id) = env.get(&carrier_info.loop_var_name) {
env.insert(promoted_var.clone(), join_id);
eprintln!(
"[pattern2/phase224d] Added condition alias '{}' → carrier '{}' (join_id={:?})",
alias.old_name, alias.carrier_name, join_id
);
} else {
eprintln!(
"[pattern2/phase224d] WARNING: Carrier '{}' has no join_id yet!",
alias.carrier_name
"[pattern2/phase229] Dynamically resolved promoted '{}' → loop_var '{}' (join_id={:?})",
promoted_var, carrier_info.loop_var_name, join_id
);
break; // Found resolution
}
}
// Otherwise check carriers
if let Some(carrier) = carrier_info.carriers.iter().find(|c| c.name == carrier_name) {
if let Some(join_id) = carrier.join_id {
env.insert(promoted_var.clone(), join_id);
eprintln!(
"[pattern2/phase229] Dynamically resolved promoted '{}' → carrier '{}' (join_id={:?})",
promoted_var, carrier_name, join_id
);
break; // Found resolution
}
} else {
eprintln!(
"[pattern2/phase224d] WARNING: Carrier '{}' not found in carriers list!",
alias.carrier_name
);
}
}
}

2
src/mir/builder/control_flow/joinir/patterns/pattern4_carrier_analyzer.rs
View File

@ -73,7 +73,6 @@ impl Pattern4CarrierAnalyzer {
carriers: updated_carriers,
trim_helper: all_carriers.trim_helper.clone(),
promoted_loopbodylocals: all_carriers.promoted_loopbodylocals.clone(), // Phase 224
condition_aliases: all_carriers.condition_aliases.clone(), // Phase 224-D
})
}
@ -296,7 +295,6 @@ mod tests {
],
trim_helper: None,
promoted_loopbodylocals: Vec::new(), // Phase 224
condition_aliases: Vec::new(), // Phase 224-D
};
// Analyze carriers

2
src/mir/builder/control_flow/joinir/patterns/pattern_pipeline.rs
View File

@ -409,7 +409,6 @@ mod tests {
],
trim_helper: None,
promoted_loopbodylocals: Vec::new(), // Phase 224
condition_aliases: Vec::new(), // Phase 224-D
},
loop_scope: LoopScopeShapeBuilder::empty_body_locals(
BasicBlockId(0),
@ -449,7 +448,6 @@ mod tests {
whitespace_chars: vec![" ".to_string(), "\t".to_string()],
}),
promoted_loopbodylocals: Vec::new(), // Phase 224
condition_aliases: Vec::new(), // Phase 224-D
},
loop_scope: LoopScopeShapeBuilder::empty_body_locals(
BasicBlockId(0),

47
src/mir/join_ir/lowering/carrier_info.rs
View File

@ -77,28 +77,9 @@ pub enum CarrierInit {
BoolConst(bool),
}
/// Phase 224-D: Alias for promoted LoopBodyLocal in condition expressions
///
/// When a LoopBodyLocal variable is promoted to a carrier, the original variable
/// name must still be resolvable in condition expressions for backward compatibility.
///
/// # Example
///
/// ```ignore
/// // Original variable: "digit_pos"
/// // Promoted carrier: "is_digit_pos"
/// ConditionAlias {
/// old_name: "digit_pos".to_string(),
/// carrier_name: "is_digit_pos".to_string(),
/// }
/// ```
#[derive(Debug, Clone)]
pub struct ConditionAlias {
/// Original variable name (e.g., "digit_pos")
pub old_name: String,
/// Promoted carrier name (e.g., "is_digit_pos")
pub carrier_name: String,
}
// Phase 229: ConditionAlias removed - redundant with promoted_loopbodylocals
// The naming convention (old_name → "is_<old_name>" or "is_<old_name>_match")
// is sufficient to resolve promoted variables dynamically.
/// Information about a single carrier variable
#[derive(Debug, Clone)]
@ -186,13 +167,13 @@ pub struct CarrierInfo {
/// These variables were originally LoopBodyLocal but have been promoted to carriers
/// during condition promotion (e.g., DigitPosPromoter). The lowerer should skip
/// LoopBodyLocal checks for these variables.
pub promoted_loopbodylocals: Vec<String>,
/// Phase 224-D: Condition aliases for promoted LoopBodyLocal variables
///
/// Maps old variable names to their promoted carrier names for condition resolution.
/// This allows break/continue conditions to reference promoted variables by their
/// original names (e.g., `if digit_pos < 0` still works after promotion to "is_digit_pos").
pub condition_aliases: Vec<ConditionAlias>,
/// Phase 229: Naming convention for promoted carriers:
/// - DigitPos pattern: "var" → "is_var" (e.g., "digit_pos" → "is_digit_pos")
/// - Trim pattern: "var" → "is_var_match" (e.g., "ch" → "is_ch_match")
///
/// Condition variable resolution dynamically infers the carrier name from this list.
pub promoted_loopbodylocals: Vec<String>,
}
impl CarrierInfo {
@ -256,7 +237,6 @@ impl CarrierInfo {
carriers,
trim_helper: None, // Phase 171-C-5: No Trim pattern by default
promoted_loopbodylocals: Vec::new(), // Phase 224: No promoted variables by default
condition_aliases: Vec::new(), // Phase 224-D: No aliases by default
})
}
@ -317,7 +297,6 @@ impl CarrierInfo {
carriers,
trim_helper: None, // Phase 171-C-5: No Trim pattern by default
promoted_loopbodylocals: Vec::new(), // Phase 224: No promoted variables by default
condition_aliases: Vec::new(), // Phase 224-D: No aliases by default
})
}
@ -345,7 +324,6 @@ impl CarrierInfo {
carriers,
trim_helper: None, // Phase 171-C-5: No Trim pattern by default
promoted_loopbodylocals: Vec::new(), // Phase 224: No promoted variables by default
condition_aliases: Vec::new(), // Phase 224-D: No aliases by default
}
}
@ -406,13 +384,6 @@ impl CarrierInfo {
self.promoted_loopbodylocals.push(promoted_var.clone());
}
}
// Phase 224-D: Merge condition_aliases (deduplicate by old_name)
for alias in &other.condition_aliases {
if !self.condition_aliases.iter().any(|a| a.old_name == alias.old_name) {
self.condition_aliases.push(alias.clone());
}
}
}
/// Phase 171-C-5: Get Trim pattern helper

8
src/mir/loop_pattern_detection/loop_body_carrier_promoter.rs
View File

@ -83,11 +83,9 @@ impl TrimPatternInfo {
// Phase 171-C-5: Attach TrimLoopHelper for pattern-specific lowering logic
carrier_info.trim_helper = Some(TrimLoopHelper::from_pattern_info(self));
// Phase 224-D: Record condition alias for promoted variable
carrier_info.condition_aliases.push(crate::mir::join_ir::lowering::carrier_info::ConditionAlias {
old_name: self.var_name.clone(),
carrier_name: self.carrier_name.clone(),
});
// Phase 229: Record promoted variable (no need for condition_aliases)
// Dynamic resolution uses promoted_loopbodylocals + naming convention
carrier_info.promoted_loopbodylocals.push(self.var_name.clone());
carrier_info
}

10
src/mir/loop_pattern_detection/loop_body_digitpos_promoter.rs
View File

@ -199,18 +199,16 @@ impl DigitPosPromoter {
vec![promoted_carrier],
);
// Phase 224-D: Record condition alias for promoted variable
carrier_info.condition_aliases.push(crate::mir::join_ir::lowering::carrier_info::ConditionAlias {
old_name: var_in_cond.clone(),
carrier_name: carrier_name.clone(),
});
// Phase 229: Record promoted variable (no need for condition_aliases)
// Dynamic resolution uses promoted_loopbodylocals + naming convention
carrier_info.promoted_loopbodylocals.push(var_in_cond.clone());
eprintln!(
"[digitpos_promoter] A-4 DigitPos pattern promoted: {} → {}",
var_in_cond, carrier_name
);
eprintln!(
"[digitpos_promoter] Phase 224-D: Added condition alias '{}' → '{}'",
"[digitpos_promoter] Phase 229: Recorded promoted variable '{}' (carrier: '{}')",
var_in_cond, carrier_name
);