refactor(optimizer): 重构SSA对象稳定性分析以支持动态方法调用优化

- 将对象稳定性分析从属性提升优化中分离为独立方法
- 添加analyzeStableObjects方法用于分析方法分派的对象稳定性
- 修改optimizeObjectProps方法只在启用原生类型时执行属性提升
- 提取collectStableObjectCandidates辅助方法收集稳定对象候选者
- 更新翻译器中的优化执行顺序和条件判断逻辑
- 添加两个新的动态调用测试用例验证重

src/Php/Optimizer/SsaPropOptimizer.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * SSA-based object property reference hoisting optimizer.
+ * SSA-based object stability and property reference hoisting optimizer.
  *
  * Extends the existing $this->intProp optimization to any SSA-proven stable
  * object. When an object variable has a single definition, no escape/reference/
@@ -33,7 +33,8 @@ use PhpParser\Node\Expr;
 trait SsaPropOptimizer
 {
     /**
-     * Analyze object stability and identify safe property accesses.
+     * Analyze object stability for method dispatch and other non-native
+     * optimizations.
      * Called after SSA build and var type optimization in parseFunction().
      *
      * Scans the function body AST to find object assignments (e.g. $o = new Foo()),
@@ -41,12 +42,28 @@ trait SsaPropOptimizer
      * This must be done during analysis because $this->context->objects is only
      * populated during code generation (after analysis).
      */
-    protected function optimizeObjectProps(SsaBuilder $ssa): void
+    protected function analyzeStableObjects(SsaBuilder $ssa): void
     {
-        if (!$this->nativeTypes) {
+        [$objectAssigns] = $this->collectStableObjectCandidates($ssa);
-            return;
+
+        foreach ($objectAssigns as $objName => $className) {
+            if (!$className || $className === 'stdClass' || !$this->hasClass($className)) {
+                continue;
+            }
+
+            if (!$this->isObjectSsaStable($ssa, $objName, $objectAssigns)) {
+                continue;
+            }
+
+            $this->context->stableObjects[$objName] = $className;
         }
+    }
 
+    /**
+     * Identify safe property accesses for native typed property hoisting.
+     */
+    protected function optimizeObjectProps(SsaBuilder $ssa): void
+    {
         if ($this->classDef && !$this->classDef->trait) {
             if ($this->isClassSafeForPropHoisting($this->getFullClassName())) {
                 $unsafeProps = $this->collectDangerousPropOps('this_', $ssa->getStmts());
@@ -58,36 +75,11 @@ trait SsaPropOptimizer
             }
         }
 
-        if (empty($ssa->ssaVars)) {
+        [, $objectAliases] = $this->collectStableObjectCandidates($ssa);
-            return;
-        }
-
-        // Seed with function parameters that are typed objects, then propagate
-        // simple object aliases such as `$next = $right`.
-        $objectAssigns = [];
-        foreach ($this->context->objects as $objName => $className) {
-            if ($objName === 'this_') {
-                continue;
-            }
-            $objectAssigns[$objName] = $className;
-        }
-        $objectAliases = [];
-        $objectAssigns = $this->collectObjectAssignments($ssa->getStmts(), $objectAssigns, $objectAliases);
-
-        foreach ($objectAssigns as $objName => $className) {
-            if ($objName === 'this_') {
-                continue;
-            }
-
-            if (!$className || $className === 'stdClass' || !$this->hasClass($className)) {
-                continue;
-            }
-
-            if (!$this->isObjectSsaStable($ssa, $objName, $objectAssigns)) {
-                continue;
-            }
 
+        foreach ($this->context->stableObjects as $objName => $className) {
             if (!$this->isClassSafeForPropHoisting($className)) {
+                $this->context->unsafeObjectProps[$objName] = ['*' => true];
                 continue;
             }
 
@@ -98,9 +90,31 @@ trait SsaPropOptimizer
             if ($unsafeProps) {
                 $this->context->unsafeObjectProps[$objName] = $unsafeProps;
             }
+        }
+    }
 
-            $this->context->stableObjects[$objName] = $className;
+    /**
+     * @return array{0: array<string, string>, 1: array<string, string>}
+     */
+    protected function collectStableObjectCandidates(SsaBuilder $ssa): array
+    {
+        if (empty($ssa->ssaVars)) {
+            return [[], []];
         }
+
+        $objectAssigns = [];
+        foreach ($this->context->objects as $objName => $className) {
+            if ($objName === 'this_') {
+                continue;
+            }
+            $objectAssigns[$objName] = $className;
+        }
+        $objectAliases = [];
+
+        return [
+            $this->collectObjectAssignments($ssa->getStmts(), $objectAssigns, $objectAliases),
+            $objectAliases,
+        ];
     }
 
     /**

src/Php/Translator.php

@@ -2835,12 +2835,14 @@ CODE;
             $ssaBuilder = new SsaBuilder($v->stmts, $this->functionDef->argInfoList);
             $ssaBuilder->build();
             $this->context->ssaBuilder = $ssaBuilder;
-            // Narrow local variable types based on SSA analysis
+            $this->analyzeStableObjects($ssaBuilder);
-            $this->optimizeVarTypes($ssaBuilder);
+            if ($this->nativeTypes) {
-            // Narrow range-proven loop counters independent of native_types
+                // Narrow local variable types based on SSA analysis.
-            $this->optimizeLoopVars($ssaBuilder);
+                $this->optimizeVarTypes($ssaBuilder);
-            // Analyze object stability for property reference hoisting
+                // Narrow range-proven loop counters and native property accesses.
-            $this->optimizeObjectProps($ssaBuilder);
+                $this->optimizeLoopVars($ssaBuilder);
+                $this->optimizeObjectProps($ssaBuilder);
+            }
             $this->context->resetAnalysisTemporaries($oriLocalVars, $oriTmpVarIndex);
         }
 

tests/aot/dynamic_call/call-namespaced-parent-override.phpt

@@ -0,0 +1,43 @@
+--TEST--
+call overridden method through namespaced parent type
+--FILE--
+<?php
+namespace Demo {
+    use native_types;
+
+    class Base
+    {
+        public function run(): string
+        {
+            return 'base';
+        }
+    }
+
+    class Impl extends Base
+    {
+        public function run(): string
+        {
+            return 'impl';
+        }
+    }
+
+    function run(Base $obj): string
+    {
+        $alias = $obj;
+        return $alias->run();
+    }
+}
+
+namespace {
+    use Demo\Impl;
+
+    function main(): int
+    {
+        $r = Demo\run(new Impl());
+        echo "result: $r\n";
+        return $r === 'impl' ? 0 : 1;
+    }
+}
+?>
+--EXPECT--
+result: impl

tests/aot/dynamic_call/call-parent-return-override-no-native-types.phpt

@@ -0,0 +1,35 @@
+--TEST--
+call overridden method through parent parameter type without native_types
+--FILE--
+<?php
+class Base
+{
+    public function run(): string
+    {
+        return 'base';
+    }
+}
+
+class Impl extends Base
+{
+    public function run(): string
+    {
+        return 'impl';
+    }
+}
+
+function run(Base $obj): string
+{
+    $alias = $obj;
+    return $alias->run();
+}
+
+function main(): int
+{
+    $r = run(new Impl());
+    echo "result: $r\n";
+    return $r === 'impl' ? 0 : 1;
+}
+?>
+--EXPECT--
+result: impl