perf: streamline dynamic property writes

src/Parser/AssignOpTrait.php

@@ -102,7 +102,12 @@ trait AssignOpTrait
         return $code . '((' . $tmp . ' = ' . $value . ', ' . "{$array}.offsetSet({$dim}, {$tmp})" . '), ' . $tmp . ')';
     }
 
-    protected function parseAssignPropertyFetch(NodeAbstract $left, NodeAbstract $right, ?PropertyWriteTarget $target = null): string
+    protected function parseAssignPropertyFetch(
+        NodeAbstract $left,
+        NodeAbstract $right,
+        ?PropertyWriteTarget $target = null,
+        bool $resultUnused = false,
+    ): string
     {
         if ($target !== null) {
             $this->assertCanAssignPropertyWrite($target, $right);
@@ -115,6 +120,15 @@ trait AssignOpTrait
             $rightExpr = $this->wrapObjectPropertyAssignTypeCheck($left, $right, $rightExpr);
         }
 
+        if ($resultUnused
+            && $left instanceof Expr\PropertyFetch
+            && !$this->shouldMaterializeOrderedOperand($left->name)
+            && $this->canEmitDirectArrayWriteOperand($right)
+            && $this->canEmitDynamicPropertyTarget($target)
+        ) {
+            return $this->emitDynamicPropertyFetchWrite($left, $rightExpr, $target);
+        }
+
         $tmp = $this->genTmpVarName();
         $this->addLocalVar($tmp, Type::VAR);
         // Comma expression: store RHS → execute side effect → evaluate to stored value
@@ -494,7 +508,7 @@ trait AssignOpTrait
         }
 
         if ($propertyWriteTarget !== null && $this->shouldUseDynamicNativePropertyWrite($left, $type)) {
-            return $this->parseAssignPropertyFetch($left, $right, $propertyWriteTarget);
+            return $this->parseAssignPropertyFetch($left, $right, $propertyWriteTarget, $resultUnused);
         }
 
         if ($this->isVarExpr($left)) {
@@ -645,7 +659,7 @@ trait AssignOpTrait
                 }
             }
         } elseif ($this->isPropertyFetch($left) and !$this->isNativePropertyAccess($left)) {
-            return $this->parseAssignPropertyFetch($left, $right, $propertyWriteTarget);
+            return $this->parseAssignPropertyFetch($left, $right, $propertyWriteTarget, $resultUnused);
         } elseif ($this->isArrayDimFetch($left) and $this->isVarExpr($left->var)) {
             $tmp = $this->parseIdentifier($left->var);
             if ($this->getVarType($tmp) === Type::STR and $left->dim === null) {

src/Parser/ForeachTrait.php

@@ -124,7 +124,7 @@ trait ForeachTrait
     {
         $iterator = $this->genTmpVarName();
         $byRef = $node->byRef ? 'true' : 'false';
-        $scope = $this->class ? $this->getClassEntryPtr($this->getFullClassName()) : 'nullptr';
+        $scope = $this->class ? $this->getLocalClassEntryPtr($this->getFullClassName()) : 'nullptr';
         $code = '{' . PHP_EOL;
         $this->indentLevel++;
         $code .= $this->getIndent() . "php::ForeachIterator $iterator{{$iterableVar}, $byRef, $scope};" . PHP_EOL;

src/Parser/PropertyAccessTrait.php

@@ -41,7 +41,7 @@ trait PropertyAccessTrait
     {
         $scope = $this->usesTraitPropertyScope($object)
             ? 'php::FakeScopeGuard::current()'
-            : ($this->class ? $this->getClassEntryPtr($this->getFullClassName()) : 'nullptr');
+            : ($this->class ? $this->getLocalClassEntryPtr($this->getFullClassName()) : 'nullptr');
         return 'typephp_write_property_scoped('
             . $object . ', ' . $property . ', ' . $value . ', ' . $scope . ')';
     }

tests/compiler/object_property/dynamic-property-write-fast-path.phpt

@@ -0,0 +1,60 @@
+--TEST--
+Dynamic property statement writes preserve scope, evaluation and reference value semantics
+--FILE--
+<?php
+declare(strict_types=1);
+
+final class DynamicWriter
+{
+    private int $hidden = 0;
+
+    public function write(string $name, mixed $value): void
+    {
+        $this->$name = $value;
+    }
+
+    public function writeFromReference(string $name, mixed &$value): void
+    {
+        $this->$name = $value;
+    }
+
+    public function writeComputed(string $name, int &$calls): void
+    {
+        $this->$name = nextDynamicValue($calls);
+    }
+
+    public function value(): int
+    {
+        return $this->hidden;
+    }
+}
+
+function nextDynamicValue(int &$calls): int
+{
+    $calls++;
+    return 41;
+}
+
+function main(): void
+{
+    $writer = new DynamicWriter();
+    $name = 'hidden';
+    $writer->write($name, 17);
+    var_dump($writer->value());
+
+    $calls = 0;
+    $writer->writeComputed($name, $calls);
+    var_dump($writer->value(), $calls);
+
+    $source = 42;
+    $writer->writeFromReference($name, $source);
+    $source = 43;
+    var_dump($writer->value(), $source);
+}
+?>
+--EXPECT--
+int(17)
+int(41)
+int(1)
+int(42)
+int(43)