phase29ao(p23): strict/dev adopt pattern3 from facts

src/mir/builder/control_flow/joinir/patterns/router.rs

@@ -357,6 +357,28 @@ pub(crate) fn route_loop_pattern(
             return PlanLowerer::lower(builder, core_plan, ctx);
         }
 
+        if strict_or_dev
+            && matches!(
+                domain_plan,
+                crate::mir::builder::control_flow::plan::DomainPlan::Pattern3IfPhi(_)
+            )
+        {
+            let facts = outcome
+                .facts
+                .as_ref()
+                .ok_or_else(|| "pattern3 strict/dev adopt failed: facts missing".to_string())?;
+            if facts.facts.pattern3_ifphi.is_none() {
+                return Err("pattern3 strict/dev adopt failed: facts mismatch".to_string());
+            }
+            let core_plan =
+                PlanNormalizer::normalize_pattern3_if_phi_from_facts(builder, facts, ctx)?
+                    .ok_or_else(|| {
+                        "pattern3 strict/dev adopt failed: compose rejected".to_string()
+                    })?;
+            PlanVerifier::verify(&core_plan)?;
+            return PlanLowerer::lower(builder, core_plan, ctx);
+        }
+
         return lower_via_plan(builder, domain_plan, ctx);
     }
 

src/mir/builder/control_flow/plan/normalizer/pattern3_if_phi.rs

@@ -3,12 +3,28 @@ use super::{CoreEffectPlan, CoreLoopPlan, CorePhiInfo, CorePlan, Pattern3IfPhiPl
 use crate::mir::basic_block::EdgeArgs;
 use crate::mir::builder::control_flow::edgecfg::api::{BlockParams, BranchStub, EdgeStub, ExitKind, Frag};
 use crate::mir::builder::control_flow::joinir::patterns::router::LoopPatternContext;
+use crate::mir::builder::control_flow::plan::facts::pattern3_ifphi_facts::Pattern3IfPhiFacts;
+use crate::mir::builder::control_flow::plan::normalize::CanonicalLoopFacts;
 use crate::mir::builder::MirBuilder;
 use crate::mir::join_ir::lowering::inline_boundary::JumpArgsLayout;
 use crate::mir::MirType;
 use std::collections::BTreeMap;
 
 impl super::PlanNormalizer {
+    pub(in crate::mir::builder) fn normalize_pattern3_if_phi_from_facts(
+        builder: &mut MirBuilder,
+        facts: &CanonicalLoopFacts,
+        ctx: &LoopPatternContext,
+    ) -> Result<Option<CorePlan>, String> {
+        let Some(pattern3) = facts.facts.pattern3_ifphi.as_ref() else {
+            return Ok(None);
+        };
+
+        let parts = plan_from_facts(pattern3);
+        let core_plan = Self::normalize_pattern3_if_phi(builder, parts, ctx)?;
+        Ok(Some(core_plan))
+    }
+
     /// Phase 286 P2.6.1: Pattern3IfPhi → CorePlan 変換
     ///
     /// Expands Pattern3 (Loop with If-Phi) semantics into generic CorePlan:
@@ -299,3 +315,15 @@ impl super::PlanNormalizer {
         Ok(CorePlan::Loop(loop_plan))
     }
 }
+
+fn plan_from_facts(facts: &Pattern3IfPhiFacts) -> Pattern3IfPhiPlan {
+    Pattern3IfPhiPlan {
+        loop_var: facts.loop_var.clone(),
+        carrier_var: facts.carrier_var.clone(),
+        condition: facts.condition.clone(),
+        if_condition: facts.if_condition.clone(),
+        then_update: facts.then_update.clone(),
+        else_update: facts.else_update.clone(),
+        loop_increment: facts.loop_increment.clone(),
+    }
+}