feat(joinir): Phase 176 Pattern2 multi-carrier lowering complete
Task 176-1: Pattern2 limitation investigation - Identified 10 limitation points where only position carrier was handled - Added TODO markers for Phase 176-2/3 implementation - Created phase176-pattern2-limitations.md documentation Task 176-2: CarrierUpdateLowerer helper implementation - Implemented emit_carrier_update() helper function - Supports CounterLike and AccumulationLike UpdateExpr patterns - Added 6 unit tests (all passing) - Fail-Fast error handling for carrier/variable not found Task 176-3: Pattern2 lowerer multi-carrier extension - Extended header PHI generation for all carriers - Implemented loop update for all carriers using emit_carrier_update() - Extended ExitLine/ExitMeta construction for all carriers - Updated function call/jump args to include all carriers - 9/10 tests passing (1 pre-existing test issue) Task 176-4: E2E testing and bug fixes - Fixed Trim pattern loop_var_name overwrite bug (pattern2_with_break.rs) - Fixed InstructionRewriter latch_incoming mapping bug - All E2E tests passing (RC=0): pos + result dual-carrier loops work - test_jsonparser_parse_string_min2.hako verified Task 176-5: Documentation updates - Created phase176-completion-report.md - Updated phase175-multicarrier-design.md with completion status - Updated joinir-architecture-overview.md roadmap - Updated CURRENT_TASK.md with Phase 176 completion + Phase 177 TODO - Updated loop_pattern_space.md F-axis (multi-carrier support complete) Technical achievements: - Pattern2 now handles single/multiple carriers uniformly - CarrierInfo architecture proven to work end-to-end - Two critical bugs fixed (loop_var overwrite, latch_incoming mapping) - No regressions in existing tests Next: Phase 177 - Apply to JsonParser _parse_string full implementation
This commit is contained in:
nyash-codex
@ -65,6 +65,11 @@ impl MirBuilder {
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None, // Pattern 2 handles break-triggered vars via condition_bindings
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)?;
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eprintln!(
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"[pattern2/init] CommonPatternInitializer returned: loop_var='{}', loop_var_id={:?}, carriers={}",
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loop_var_name, loop_var_id, carrier_info.carriers.len()
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);
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// Phase 195: Use unified trace
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trace::trace().varmap("pattern2_start", &self.variable_map);
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@ -175,8 +180,22 @@ impl MirBuilder {
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// Phase 171-C-4: Convert to CarrierInfo and merge
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let promoted_carrier = trim_info.to_carrier_info();
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eprintln!(
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"[pattern2/promoter] Phase 171-C-4 DEBUG: BEFORE merge - carrier_info.loop_var_name='{}'",
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carrier_info.loop_var_name
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);
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eprintln!(
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"[pattern2/promoter] Phase 171-C-4 DEBUG: promoted_carrier.loop_var_name='{}'",
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promoted_carrier.loop_var_name
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);
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carrier_info.merge_from(&promoted_carrier);
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eprintln!(
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"[pattern2/promoter] Phase 171-C-4 DEBUG: AFTER merge - carrier_info.loop_var_name='{}'",
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carrier_info.loop_var_name
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);
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eprintln!(
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"[pattern2/promoter] Phase 171-C-4: Merged carrier '{}' into CarrierInfo (total carriers: {})",
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trim_info.carrier_name,
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@ -248,12 +267,12 @@ impl MirBuilder {
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eprintln!("[pattern2/trim] Registered carrier '{}' in variable_map", carrier_name);
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// Update carrier_info with actual ValueId
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carrier_info.loop_var_id = is_ch_match0;
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carrier_info.loop_var_name = carrier_name.clone();
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// Note: DO NOT overwrite carrier_info.loop_var_id/loop_var_name here!
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// The loop variable is 'pos' (counter), not 'is_ch_match' (carrier).
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// carrier_info.loop_var_name should remain as the original loop variable.
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eprintln!("[pattern2/trim] Updated carrier_info: loop_var='{}', loop_var_id={:?}",
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carrier_info.loop_var_name, carrier_info.loop_var_id);
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eprintln!("[pattern2/trim] Carrier registered. Loop var='{}' remains unchanged",
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carrier_info.loop_var_name);
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// Phase 172-4: Break condition will be replaced below after JoinIR generation
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eprintln!("[pattern2/trim] Trim pattern lowering enabled, proceeding to JoinIR generation");
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@ -298,6 +317,15 @@ impl MirBuilder {
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eprintln!("[pattern2/trim] Added carrier '{}' to ConditionEnv: HOST {:?} → JoinIR {:?}",
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helper.carrier_name, condition_bindings.last().unwrap().host_value, condition_bindings.last().unwrap().join_value);
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// Phase 176-6: Also map the original variable name to the same JoinIR ValueId
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// This allows the loop body to reference the original variable (e.g., 'ch')
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// even though it was promoted to a carrier (e.g., 'is_ch_match')
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let join_value = condition_bindings.last().unwrap().join_value;
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env.insert(helper.original_var.clone(), join_value);
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eprintln!("[pattern2/trim] Phase 176-6: Also mapped original var '{}' → JoinIR {:?}",
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helper.original_var, join_value);
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// Generate negated carrier check: !is_ch_match
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let negated_carrier = TrimPatternLowerer::generate_trim_break_condition(helper);
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@ -310,9 +338,71 @@ impl MirBuilder {
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break_condition_node.clone()
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};
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// Phase 176-3: Analyze carrier updates from loop body
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use crate::mir::join_ir::lowering::loop_update_analyzer::LoopUpdateAnalyzer;
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let carrier_updates = LoopUpdateAnalyzer::analyze_carrier_updates(_body, &carrier_info.carriers);
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eprintln!(
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"[cf_loop/pattern2] Phase 176-3: Analyzed {} carrier updates",
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carrier_updates.len()
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);
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// Phase 176-4: Filter carriers to only include those with actual updates
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// Issue: CommonPatternInitializer includes all variables in variable_map as carriers,
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// but only variables with updates in the loop body are true carriers.
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// Condition-only variables (like 'len', 's') should be excluded.
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let original_carrier_count = carrier_info.carriers.len();
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carrier_info.carriers.retain(|carrier| {
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carrier_updates.contains_key(&carrier.name)
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});
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eprintln!(
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"[cf_loop/pattern2] Phase 176-4: Filtered carriers: {} → {} (kept only carriers with updates)",
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original_carrier_count,
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carrier_info.carriers.len()
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);
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// Phase 176-5: Add body-only carriers to ConditionEnv
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// Issue: Carriers that are updated in the loop body but not used in the condition
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// need to be added to ConditionEnv with their initial values.
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for carrier in &carrier_info.carriers {
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if env.get(&carrier.name).is_none() {
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// Allocate a new JoinIR ValueId for this carrier
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let join_value = alloc_join_value();
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// Add to ConditionEnv
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env.insert(carrier.name.clone(), join_value);
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// Add to condition_bindings for later processing
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condition_bindings.push(ConditionBinding {
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name: carrier.name.clone(),
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host_value: carrier.host_id,
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join_value,
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});
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eprintln!(
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"[cf_loop/pattern2] Phase 176-5: Added body-only carrier '{}' to ConditionEnv: HOST {:?} → JoinIR {:?}",
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carrier.name, carrier.host_id, join_value
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);
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}
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}
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// Phase 169 / Phase 171-fix / Phase 172-3 / Phase 170-B: Call Pattern 2 lowerer with break_condition
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// Phase 33-14: Now returns (JoinModule, JoinFragmentMeta) for expr_result + carrier separation
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let (join_module, fragment_meta) = match lower_loop_with_break_minimal(scope, condition, &effective_break_condition, &env, &loop_var_name) {
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// Phase 176-3: Multi-carrier support - pass carrier_info and carrier_updates
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eprintln!(
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"[pattern2/before_lowerer] About to call lower_loop_with_break_minimal with carrier_info.loop_var_name='{}'",
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carrier_info.loop_var_name
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);
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let (join_module, fragment_meta) = match lower_loop_with_break_minimal(
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scope,
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condition,
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&effective_break_condition,
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&env,
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&carrier_info,
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&carrier_updates,
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) {
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Ok((module, meta)) => (module, meta),
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Err(e) => {
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// Phase 195: Use unified trace
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@ -328,13 +418,30 @@ impl MirBuilder {
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use crate::mir::builder::control_flow::joinir::merge::exit_line::ExitMetaCollector;
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let exit_bindings = ExitMetaCollector::collect(self, &exit_meta, debug);
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// Phase 176-3: Build input mappings for all carriers
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// JoinIR main() params: [ValueId(0), ValueId(1), ValueId(2), ...] for (i, carrier1, carrier2, ...)
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// Host values: [loop_var_id, carrier1_host_id, carrier2_host_id, ...]
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let mut join_input_slots = vec![ValueId(0)]; // Loop variable
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let mut host_input_values = vec![loop_var_id]; // Loop variable
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for (idx, carrier) in carrier_info.carriers.iter().enumerate() {
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join_input_slots.push(ValueId((idx + 1) as u32));
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host_input_values.push(carrier.host_id);
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}
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eprintln!(
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"[cf_loop/pattern2] Phase 176-3: Boundary inputs - {} JoinIR slots, {} host values",
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join_input_slots.len(),
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host_input_values.len()
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);
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// Phase 200-2: Use JoinInlineBoundaryBuilder for clean construction
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// Canonical Builder pattern - see docs/development/current/main/joinir-boundary-builder-pattern.md
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use crate::mir::join_ir::lowering::JoinInlineBoundaryBuilder;
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let boundary = JoinInlineBoundaryBuilder::new()
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.with_inputs(
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vec![ValueId(0)], // JoinIR's main() parameter (loop variable init)
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vec![loop_var_id], // Host's loop variable
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join_input_slots, // JoinIR's main() parameters (loop variable + carriers)
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host_input_values, // Host's loop variable + carrier values
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)
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.with_condition_bindings(condition_bindings)
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.with_exit_bindings(exit_bindings.clone())
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